Patent Publication Number: US-9889643-B2

Title: Recording device and recording method

Description:
TECHNICAL FIELD 
     The present invention relates to a recording device that performs recording on a medium and a recording method that is used in a recording device. 
     BACKGROUND ART 
     In the related art, ink jet type printers, which are provided with a support table (a support unit) that includes a support surface on which a medium is supported, and a printing unit (recording unit), which is provided so as to extend over the top of the support table, and which is configured to be moveable along the support surface on the basis of drive power which is transmitted from a drive motor, are widely known as a kind of recording device (for example, refer to PTL 1). In printers that are configured in this manner, a printing head, which is built into a carriage, performs printing on a medium that is supported on a support surface while the carriage that configures a printing unit scans in a scanning direction, which is intersects a movement direction of the printing unit. 
     CITATION LIST 
     Patent Literature 
     PTL 1: JP-A-2009-291995 
     SUMMARY OF INVENTION 
     Technical Problem 
     Given that, in the abovementioned printers, a power source, which is to be a supply source of a voltage of an entire device that includes a printing unit, is arranged on a support table. Further, in a case in which a voltage is supplied to the printing unit from the power source, it is necessary to make a length of a cable that leads from the power source to the printing unit sufficiently long to an extent at which the cable does not interfere with movement of the printing unit. As a result of this, there is a problem in that it is more likely that a voltage drop will occur when supplying a voltage to the printing unit from the power source. 
     Accordingly, it is an object of the present invention to provide a recording device that can suppress the occurrence of a voltage drop in a voltage that is supplied to a recording unit, and a recording method that is used in the recording device. 
     Solution to Problem 
     According to an aspect of the invention, there is provided a recording device including: a support unit that includes a support surface that supports a medium; and a recording unit, which is capable of moving relatively in a direction that runs along the support surface with respect to the medium that is supported on the support unit, and which performs a recording operation on the medium from a recording head, in which the support unit includes a first power source, and a support control unit that controls operation of the support unit on the basis of power that is supplied from the first power source, and the recording unit includes a second power source, and a recording control unit that controls operation of the recording unit on the basis of power that is supplied from the second power source. 
     According to the abovementioned configuration, the recording unit includes the individual second power source that is separate from the first power source that is provided in the support unit. Therefore, even if a configuration in which the recording unit moves relatively in a direction that runs along the support surface with respect to the support unit, is used, a cable that leads from the second power source does not interfere with the relative movement. Therefore, as a result of the fact that shortening of the length of a cable that leads from the second power source is made possible, it is possible to suppress a voltage drop from occurring in a voltage that is supplied from the second power source to the recording unit through a cable. 
     In addition, in the abovementioned recording device, it is preferable that the support control unit and the recording control unit are capable of executing a reset operation that returns respective operational states to an initial state, and in a case in which one control unit of the support control unit and the recording control unit has initiated the reset operation, the corresponding control unit transmits a reset initiation signal, which initiates the reset operation after causing an operational state save operation to be performed, to the other control unit. 
     In addition, according to another aspect of the invention, there is provided a recording method that is used in a recording device that is provided with a support unit that includes a support surface that supports a medium, and a recording unit, which is capable of moving relatively in a direction that runs along the support surface with respect to the medium that is supported on the support unit, and which performs a recording operation on the medium from a recording head, in which the support unit includes a first power source, and a support control unit that controls operation of the support unit on the basis of power that is supplied from the first power source, and the recording unit includes a second power source, and a recording control unit that controls operation of the recording unit on the basis of power that is supplied from the second power source. The recording method causes the recording device to execute a power source OFF signal transmission step of transmitting a power source OFF signal, which shows that supply of power from the first power source and the second power source has been terminated, from the first power source and the second power source to the control units to which the first power source and the second power source correspond, and a reset initiation signal transmission step of transmitting a reset initiation signal, which initiates a reset operation, from a control unit to which the power source OFF signal was transmitted in the power source OFF signal transmission step to a partner control unit after causing an operational state save operation to be performed. 
     According to the abovementioned configuration or method, when one control unit of the support control unit and the recording control unit initiates a reset operation, an operational state save operation is performed in the other control unit, and a reset operation of the control unit is subsequently initiated. Therefore, since there is not a circumstance in which only one of the control units of the support control unit and the recording control unit performs a reset operation, it is possible to avoid a circumstance in which a communication error is generated between the control units. 
     In addition, in the abovementioned recording device, it is preferable that the support control unit and the recording control unit are capable of mutually transmitting a reset completion signal in a case in which the respective reset operations have been completed, and each control unit determines whether or not the reset operation of both control units has been completed on the basis of whether or not the reset completion signal has been transmitted from a partner control unit in a state in which a self-reset operation has been completed. 
     In addition, it is preferable that the abovementioned recording method further causes the recording device to execute a reset completion signal transmission step of mutually transmitting a reset completion signal in a case in which the support control unit and the recording control unit have completed the respective reset operations, and a reset completion determination step of causing each control unit determine whether or not the reset operations of both control units have been completed on the basis of whether or not the reset completion signal was transmitted from a partner control unit in the reset completion signal transmission step in a state in which a self-reset operation has been completed. 
     According to the abovementioned configuration or method, it is possible to determine whether or not a reset operation of both control units has been completed due to the support control unit and the recording control unit mutually transmitting a reset completion signal. 
     In addition, in the abovementioned recording device, it is preferable that each control unit terminates transmission of the reset completion signal to the partner control unit in a case in which the reset completion signal has been transmitted from the partner control unit in a state in which the self-reset operation has been completed. 
     In addition, it is preferable that the abovementioned recording method further cause the recording device to execute a reset completion signal termination step of causing each control unit to terminate transmission of the reset completion signal to the partner control unit in the reset completion determination step in a case in which it is determined that the reset operation of the partner control unit has been completed. 
     According to this configuration or method, since the transmission of the reset completion signal by each of the support control unit and the recording control unit to the partner control unit is not necessary after the reset operation of both control units has been completed, the transmission of the reset completion signal is terminated. Therefore, it is possible to avoid a circumstance in which the support control unit and the recording control unit transmit the reset completion signal over a period of time that is longer than necessary. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a perspective view of an embodiment of a printer. 
         FIG. 2  is a block diagram that shows a control configuration of a printer of the same embodiment. 
         FIG. 3  is a flowchart that shows a process routine of a reset operation that the printer of the same embodiment executes. 
         FIG. 4  is a diagram that shows timing charts of the process routine of the reset operation that the printer of the same embodiment executes. Part (a) is a timing chart that shows a transition of an AC voltage that is supplied to a first power source device from an AC power source, Part (b) is a timing chart that shows a transition of a DC voltage that is supplied to a first CPU from the first power source device, Part (c) is a timing chart that shows a transition of a signal voltage of an AC OFF signal that is transmitted to the first CPU from the first power source device, Part (d) is a timing chart that shows a transition of a signal voltage of a memory writing signal that is transmitted to a first non-volatile memory from the first CPU, Part (e) is a timing chart that shows a transition of a signal voltage of a reset signal that is transmitted to the first CPU from a first reset IC, Part (f) is a timing chart that shows a transition of a signal voltage of an NMI signal that is transmitted to a second CPU from the first CPU, Part (g) is a timing chart that shows a transition of a signal voltage of a synchronization signal that is transmitted to the second CPU from the first CPU, Part (h) is a timing chart that shows a transition of an AC voltage that is supplied to a second power source device from an AC power source, Part (i) is a timing chart that shows a transition of a DC voltage that is supplied to the second CPU from the second power source device, Part (j) is a timing chart that shows a transition of a signal voltage of an AC OFF signal that is transmitted to the second CPU from the second power source device, Part (k) is a timing chart that shows a transition of a signal voltage of a memory writing signal that is transmitted to a second non-volatile memory from the second CPU, Part (l) is a timing chart that shows a transition of a signal voltage of a reset signal that is transmitted to the second CPU from a second reset IC, Part (m) is a timing chart that shows a transition of a signal voltage of an NMI signal that is transmitted to the first CPU from the second CPU, and Part (n) is a timing chart that shows a transition of a signal voltage of a synchronization signal that is transmitted to the first CPU from the second CPU. 
     
    
    
     DESCRIPTION OF EMBODIMENT 
     Hereinafter, an embodiment in which the recording device is realized in an ink jet type printer will be described with reference to the drawings. 
     As shown in  FIG. 1 , a printer is provided with a base platform  12  as an example of a support unit that is configured to include a support frame  11  with a frame structure placed on the bottom surface thereof. An upper surface of the base platform  12  forms a support surface  13  on which a medium P is supported, and a plurality of suction holes  14  are open in the support surface  13 . In addition, a decompression chamber  15  is provided in a bottom part of the support surface  13  of the base platform  12 , and a vacuum pump  16  is connected to the decompression chamber  15 . In addition, a first power source device  17 , as an example of a first power source that is provided in the bottom part of the support surface  13  of the base platform  12 , is connected to the vacuum pump  16  via a cable C 1 . Further, in a case in which the vacuum pump  16  is driven on the basis of power that is supplied from the first power source device  17  via the cable C 1 , a suction force acts on the medium P, which is supported on the support surface  13  of the base platform  12 , via the suction holes  14  due to the decompression chamber  15  reaching a decompression atmosphere. 
     A guiding groove  18  is formed on a side surface of both sides (only one side is illustrated in  FIG. 1 ) of the base platform  12  that run along a length direction X of the medium P. A bottom end part of a liquid ejecting unit  20 , as an example of a gate type recording unit that extends in one direction, is engaged with the guiding groove  18  in a manner in which reciprocating movement along the length direction X of the medium P is possible. 
     In addition, a ball screw  21  is installed in the base platform  12  along a side surface of one side (the right side in  FIG. 1 ) in the length direction X of the medium P. A drive mechanism  22  that is provided in a bottom end part of one side of the liquid ejecting unit  20  in a longitudinal direction thereof, is linked to the ball screw  21 . The drive mechanism  22  is configured to include a nut member that engages with the ball screw  21 , and a drive motor that performs rotational drive of the nut member in forward and reverse directions. A second power source device  23 , as an example of a second power source that is provided on one side of the liquid ejecting unit  20  in a longitudinal direction thereof, is connected to the drive mechanism  22  via a cable C 2 . Further, in a case in which the drive motor of the drive mechanism  22  is driven on the basis of power that is supplied from the second power source device  23  via the cable C 2 , the liquid ejecting unit  20  performs reciprocating movement in the length direction X of the medium P while being guided by the guiding groove  18  due to the nut member of the drive mechanism  22  moving along the ball screw  21  while rotating. 
     The liquid ejecting unit  20  includes a main shaft  24  and an auxiliary shaft  25  that run along a longitudinal direction. A carriage  26 , which extends in a direction that intersects the length direction X of the medium P, is supported by the shafts  24  and  25  in a manner in which sliding movement along the longitudinal direction is possible. 
     A drive pulley  27  and driven pulley  28  are supported in a freely rotatable manner at positions in the liquid ejecting unit  20  that correspond to both end parts of the shafts  24  and  25 . In addition to an output shaft of a carriage motor  29 , which acts as a drive source when performing reciprocating movement of the carriage  26 , being linked to the drive pulley  27 , an endless timing belt  30 , a portion of which is linked to the carriage  26 , is hung between the pair of pulleys  27  and  28 . Therefore, the carriage  26  moves along the longitudinal direction of the shafts  24  and  25  via the endless timing belt  30  due to drive power of the carriage motor  29  while being guided by the shafts  24  and  25 . 
     Ink cartridges  31  that accommodate UV curable ink (hereinafter, referred to as “UV ink”) are arranged in a predetermined position on an end side (the right end side in  FIG. 1 ) of the liquid ejecting unit  20  in the longitudinal direction thereof. The UV ink inside the ink cartridges  31  can be supplied toward a recording head  32  that is supported on a bottom surface side of the carriage  26  through an ink supply tube  33 . Further, the recording head  32  performs printing on the medium P that is supported on the support surface  13  of the base platform  12  by ejecting the UV ink that is supplied from the ink cartridges  31 . 
     In addition, a pair of irradiation instruments  35  are supported by both side surfaces of the carriage  26 . The irradiation instruments  35  are supported by both sides in a movement direction of the carriage  26  with the recording head  32  interposed therebetween. In addition, the second power source device  23  is connected to the irradiation instruments  35  via a cable C 3 . Further, each irradiation instrument  35  cures UV ink by irradiating UV ink that is ejected onto the medium P with irradiating UV rays on the basis of power that is supplied from the second power source device  23  through the cable C 3 . 
     Next, a control configuration of the printer of the present embodiment will be described. 
     As shown in  FIG. 2 , the printer has a plurality of control substrates that include a first control substrate  40 A and a second control substrate  40 B. Each control substrate  40 A and  40 B is provided with CPUs  41 A and  41 B, reset ICs  42 A and  42 B, and non-volatile memories  43 A and  43 B. When a command is received from the CPUs  41 A and  41 B, the reset ICs  42 A and  42 B initiate a reset operation that returns respective operational states of the control substrates  40 A and  40 B to an initial state in the CPUs  41 A and  41 B. In addition, in a case in which the reset operation has been initiated by the reset ICs  42 A and  42 B, the CPUs  41 A and  41 B save respective operational states of the control substrates  40 A and  40 B on the non-volatile memories  43 A and  43 B. 
     A signal line S is connected between the first CPU  41 A of the first control substrate  40 A and the second CPU  41 B of the second control substrate  40 B, and the CPUs  41 A and  41 B of both of the control substrates  40 A and  40 B can mutually perform communication of various signals via the signal line S. In addition, the first power source device  17  and the second power source device  23  are respectively connected to the first CPU  41 A of the first control substrate  40 A and the second CPU  41 B of the second control substrate  40 B. The power source devices  17  and  23  are connected to a common AC power source  44 , and after converting an AC voltage that is supplied from the AC power source  44  to a DC voltage, supply the converted DC voltage to the CPUs  41 A and  41 B of the control substrates  40 A and  40 B to which the power source devices  17  and  23  respectively correspond. In addition, in a case in which supply of an AC voltage from the AC power source  44  is terminated, the power source devices  17  and  23  transmit an AC OFF signal, which is an example of a power source OFF signal that shows that effect, to the CPUs  41 A and  41 B of the control substrates  40 A and  40 B to which the power source devices  17  and  23  correspond. 
     Additionally, in the present embodiment, the first control substrate  40 A functions as the support control unit that controls various operations in the base platform  12 . Further, the first control substrate  40 A controls an adsorption operation of the medium P to the support surface  13  of the base platform  12  by controlling driving of the vacuum pump  16 , for example. Meanwhile, the second control substrate  40 B functions as the recording control unit that controls various operations in the liquid ejecting unit  20 . Further, the second control substrate  40 B controls a reciprocating operation of the liquid ejecting unit  20  along the length direction X of the medium P by controlling driving of the drive mechanism  22  for example, and controls an irradiation operation of UV light onto UV ink that is ejected onto the medium P by controlling driving of each irradiation instrument  35 . 
     Next, a summary of a process routine of a reset operation that the printer of the present embodiment executes during an instantaneous power outage will be described with reference to the timing charts that are shown in  FIG. 4 . 
     Firstly, as shown in  FIG. 3 , when an instantaneous power outage occurs, supply of an AC voltage from the AC power source  44  to the first power source device  17  and the second power source device  23  is terminated. Then, the first power source device  17  immediately transmits an AC OFF signal, which shows that the supply of an AC voltage from the AC power source  44  has been terminated, to the first CPU  41 A, as a power source OFF signal transmission step. Meanwhile, even if the supply of an AC voltage from the AC power source  44  has been terminated, the second power source device  23  does not transmit an AC OFF signal that shows that effect to the second CPU  41 B immediately. That is, when the supply of an AC voltage to the from the AC power source  44  to each power source device  17  and  23  has been terminated, a timing of the transmission of an AC OFF signal from each power source device  17  and  23  to the CPUs  41 A and  41 B to which the power source devices  17  and  23  correspond is individually different in each power source device  17  and  23 . The reason for this is that due to the fact that control targets of the control substrates  40 A and  40 B to which the DC voltages are supplied from each power source device  17  and  23  differ, conditions for initiating a reset operation of each control substrate  40 A and  40 B also differ. 
     Subsequently, when an AC OFF signal is received from the first power source device  17 , the first CPU  41 A writes an operational state of the first control substrate  40 A of that time to the first non-volatile memory  43 A (Step S 11 A). In addition, when an AC OFF signal is received from the first power source device  17 , as a reset initiation signal transmission step, after saving the operational state of the second control substrate  40 B at that time to the second CPU  41 B as an interrupt operation, the first CPU  41 A transmits a Non Maskable Interrupt (NMI) signal as an example of a reset initiation signal in order to initiate a reset operation. Further, when an NMI signal is received from the first CPU  41 A, the second CPU  41 B writes an operational state of the second control substrate  40 B at that time to the second non-volatile memory  43 B (Step S 11 B). 
     Subsequently, when a preparation process of the reset operation that includes writing to the first non-volatile memory  43 A has been completed, the first CPU  41 A transmits a signal that shows that effect to the first reset IC  42 A. Then, the first CPU  41 A initiates a reset operation due to a signal that prompts the initiation of a reset operation being transmitted from the first reset IC  42 A to the first CPU  41 A (Step S 12 A). Further, when the reset operation has been completed (Step S 13 A), as a reset completion signal transmission step, the first CPU  41 A sets a synchronization signal, which is an example of a reset completion signal in order to perform mutual confirmation with the second CPU  41 B of the completion or non-completion of the respectively reset operations, to High (Step S 14 A). In addition, after setting a self synchronization signal to High, the first CPU  41 A initiates a request for a partner synchronization signal from the second CPU  41 B. 
     Meanwhile, when a preparation process of the reset operation that includes writing to the second non-volatile memory  43 B has been completed, the second CPU  41 B transmits a signal that shows that effect to the second reset IC  42 B. Then, the second CPU  41 B initiates a reset operation due to a signal that prompts the initiation of a reset operation being transmitted from the second reset IC  42 B to the second CPU  41 B (Step S 12 B). Further, when the reset operation has been completed (Step S 13 B), after setting a self synchronization signal to High (Step S 14 B), the second CPU  41 B initiates a request for a partner synchronization signal from the first CPU  41 A. 
     That is, after setting the self synchronization signals thereof to High, the first CPU  41 A and the second CPU  41 B request a partner synchronization signal. Further, as a reset completion determination step, both of the CPUs  41 A and  41 B determine the fact that reset operations of both of the control substrates  40 A and  40 B have been completed by confirming the fact that a partner synchronization signal has been set to High. Further, as a reset completion signal termination step, after setting the self synchronization signals thereof to Low (Steps S 15 A and S 15 B), both of the CPUs  41 A and  41 B stand by until a new AC OFF signal is input from the power source devices  17  and  23 . 
     More specifically, in the present embodiment, as shown in Parts (a) and (h) of  FIG. 4 , the supply of an AC voltage from the AC power source  44  to each power source device  17  and  23  is terminated at a time t 1 . Further, at this time, as shown in Parts (a) and (i) of  FIG. 4 , the supply of a DC voltage from each power source device  17  and  23  to the CPUs  41 A and  41 B of the control substrates  40 A and  40 B to which the power source devices  17  and  23  correspond is maintained. That is, even if the supply of an AC voltage from the AC power source  44  is terminated temporarily, the power source devices  17  and  23  maintain the supply of a DC voltage to the CPUs  41 A and  41 B of the control substrates  40 A and  40 B to which the power source devices  17  and  23  correspond using power that has been accumulated in an electrolytic capacitor or the like. In addition, at this time, as shown in Part (c) of  FIG. 4 , an AC OFF signal is transmitted from the first power source device  17  to the first CPU  41 A at a time t 2 . Meanwhile, as shown in Part (j) of  FIG. 4 , an AC OFF signal is not transmitted from the second power source device  23  to the second CPU  41 B at the same time t 2 . 
     Further, as shown in Part (d) of  FIG. 4 , the first CPU  41 A initiates writing to the first non-volatile memory  43 A at a time t 3  after the AC OFF signal has been received from the first power source device  17 . Subsequently, as shown in Part (e) of  FIG. 4 , the first CPU  41 A initiates a reset operation on the basis of a signal that is received from the first reset IC  42 A at a time t 5  after a preparation process of the reset operation that includes writing to the first non-volatile memory  43 A has been completed. Further, as shown in Part (g) of  FIG. 4 , after setting a synchronization signal to High, the first CPU  41 A initiates a request for a synchronization signal from the second CPU  41 B at a time t 7  after the reset operation has been completed. 
     In this case, a reset operation of the second CPU  41 B has not been completed at the time t 7 . Therefore, the first CPU  41 A determines that the reset operation of the second CPU  41 B has not been completed yet due to a Low signal being received as the synchronization signal from the second CPU  41 B. Further, the first CPU  41 A continues to request a synchronization signal from the second CPU  41 B at fixed intervals while continuing to set a self synchronization signal as high until a High signal is received as the synchronization signal from the second CPU  41 B. 
     In addition, as shown in Part (f) of  FIG. 4 , the first CPU  41 A initiates the transmission of an NMI signal to the second CPU  41 B at the time t 3  after the AC OFF signal has been received from the first power source device  17 . Then, as shown in Part (k) of  FIG. 4 , the second CPU  41 B initiates writing to the second non-volatile memory  43 B at a time t 4  after the NMI signal has been received from the first CPU  41 A. Additionally, as shown in Part (m) of  FIG. 4 , when the second CPU  41 B initiates writing to the second non-volatile memory  43 B with the reception of the NMI signal from the first CPU  41 A as a trigger thereof, the first CPU  41 A initiates writing to the first non-volatile memory  43 A. Therefore, in this case, an NMI signal that prompts the initiation of writing to the first non-volatile memory  43 A is not transmitted to the first CPU  41 A from the second CPU  41 B. Further, the second CPU  41 B initiates a reset operation on the basis of a signal that is received from the second reset IC  42 B at a time t 6  after a preparation process of the reset operation that includes writing to the second non-volatile memory  43 B has been completed. In addition, as shown in Part (n) of  FIG. 4 , after setting a synchronization signal to High, the second CPU  41 B initiates a request for a synchronization signal from the first CPU  41 A at a time t 8  after the reset operation has been completed. 
     In this case, a reset operation of the first CPU  41 A has already been completed at the time t 8 . Therefore, the second CPU  41 B determines that the reset operation of the first CPU  41 A has already been completed due to a High signal being received as the synchronization signal from the first CPU  41 A. In addition, at the same time, the first CPU  41 A determines that the reset operation of the second CPU  41 B has already been completed due to a High signal being received as the synchronization signal from the second CPU  41 B. 
     Further, as shown in Parts (g) and (n) of  FIG. 4 , after the setting self synchronization signals thereof to Low, the first CPU  41 A and the second CPU  41 B stand by until a new AC OFF signal is input from the power source devices  17  and  23  at a time t 9  after it has been determined that the reset operation of a partner CPU has been completed. 
     Additionally, in the present embodiment, a self synchronization signal is set to Low at a time point at which the first CPU  41 A determines that a reset operation of the second CPU  41 B has been completed, that is, when a short amount of time has passed after the time t 8  at which the synchronization signal of the second CPU  41 B is set to High. The reason for this is that, a short time lag is generated between a time point at which the second CPU  41 B sets the self synchronization signal thereof to High along with the completion of the reset operation until the synchronization signal of the first CPU  41 A is received. Further, if the synchronization signal of the first CPU  41 A is set to low before the second CPU  41 B determines completion of the reset operation of the first CPU  41 A as a result of this time lag, it is not possible for the second CPU  41 B to determine completion of the reset operation of the first CPU  41 A. In such an instance, in the present embodiment, the synchronization signal of the first CPU  41 A is set to low after securing a period of time from when the synchronization signal of the second CPU  41 B is set to High to when the second CPU  41 B receives the synchronization signal of the first CPU  41 A. 
     Next, effects of the printer of the present embodiment will be described. 
     In the present embodiment, the base platform  12  and the liquid ejecting unit  20  are provided with the power source devices  17  and  23 , which respectively act as supply sources of power. Further, the second power source device  23  that supplies power to the liquid ejecting unit  20  is integral with the liquid ejecting unit  20 , and performs reciprocating movement along the length direction X of the medium P. Therefore, even if the liquid ejecting unit  20  performs reciprocating movement in a manner that crosses above the medium P that is supported on the support surface  13  of the base platform  12  in the length direction X of the medium P, a relative position of the liquid ejecting unit  20  and the second power source device  23  according to the reciprocating movement of the liquid ejecting unit  20  does not change. That is, a distance between the liquid ejecting unit  20  and the second power source device  23  does not change according to the reciprocating movement of the liquid ejecting unit  20 . Therefore, the lengths of the cables C 2  and C 3  that lead from the second power source device  23  to the liquid ejecting unit  20  can be reduced further than a case in which the length of the cables C 2  and C 3  that lead from the second power source device  23  to the liquid ejecting unit  20  are made long to an extent at which the cables do not interfere with the reciprocating movement of the liquid ejecting unit  20  in consideration of a range through which the liquid ejecting unit  20  performs reciprocating movement. Therefore, since a circumstance in which a voltage drop occurs when a voltage is supplied from the second power source device  23  to the liquid ejecting unit  20  via the cables C 2  and c 3  is suppressed, the operation of the liquid ejecting unit  20  can be performed stably. 
     In addition, in the present embodiment, the first control substrate  40 A and the second control substrate  40 B respectively control the operation of the targets thereof while mutually performing communication of various items of information. Therefore, when a timing with which an AC OFF signal is transmitted from a power source when an instantaneous power outage has arisen is relatively fast, and only the first control substrate  40 A has initiated a reset operation, it is possible to that a communication error will occur between the control substrates  40 A and  40 B, and the entire operation of the printer will be terminated. 
     With respect to this, in the present embodiment, when the first control substrate  40 A initiates a reset operation when an instantaneous power outage has arisen, the transmission of an NMI signal from the first control substrate  40 A to the second control substrate  40 B is also performed. Therefore, even if an AC OFF signal is not transmitted from the second power source device  23  to the second control substrate  40 B when an instantaneous power outage has arisen, the second control substrate  40 B initiates a reset operation with the reception of an NMI signal from the first control substrate  40 A as a trigger thereof. Therefore, since both of the first control substrate  40 A and the second control substrate  40 B reliably perform a reset operation when an instantaneous power outage arises, the occurrence of communication errors between the control substrates  40 A and  40 B is suppressed. 
     In the manner described above, according to the abovementioned embodiment, it is possible to obtain the effects that are shown below. 
     (1) The liquid ejecting unit  20  includes an individual second power source device  23  that is separate from the first power source device  17  that is provided in the base platform  12 . Therefore, even if the liquid ejecting unit  20  has a configuration of moving relatively in a direction that runs along the support surface  13  with respect to the base platform  12 , the cables C 2  and C 3  that lead from the second power source device  23  do not interfere with the relative movement. Therefore, due to the fact that it is possible to shorten the length of the cables C 2  and C 3  that lead from the second power source device  23 , it is possible to suppress a voltage drop from occurring in a voltage that is supplied from the second power source device  23  to the liquid ejecting unit  20  via the cables C 2  and C 3 . 
     (2) When one of the control substrates of the first control substrate  40 A and the second control substrate  40 B initiates a reset operation, the other control substrate initiates a reset operation after performing an operational state save operation. Therefore, since there is not a circumstance in which only one of the control substrates of the first control substrate  40 A and the second control substrate  40 B performs a reset operation, it is possible to avoid the occurrence of communication errors between the control substrates  40 A and  40 B. 
     (3) Due to the first control substrate  40 A and the second control substrate  40 B mutually transmitting synchronization signals, it is possible to determine whether or not the reset operations of both of the control substrates  40 A and  40 B have been completed. 
     (4) Each of the first control substrate  40 A and the second control substrate  40 B sets the synchronization signal thereof to low after the reset operations of both of the control substrates  40 A and  40 B have been completed. Therefore, it is possible for each of the first control substrate  40 A and the second control substrate  40 B to return to a stand-by state, in which reception of a new AC OFF signal from the power source that corresponds thereto is possible, after it has been determined that the reset operation of a partner control substrate has been completed. 
     Additionally, the present embodiment can be realized in the following forms. 
     In the present embodiment, the first control substrate  40 A may initiate a request for a synchronization signal from the second control substrate  40 B with the reception of an AC OFF signal from the first power source device  17  as a trigger thereof. 
     In the present embodiment, the second control substrate  40 B may initiate a request for a synchronization signal from the first control substrate  40 A with the reception of an NMI signal from the first control substrate  40 A as a trigger thereof. 
     In the present embodiment, after a reset operation has been completed, each of the first control substrate  40 A and the second control substrate  40 B need not transmit a signal that shows that effect to the partner control substrate. That is, as long as the first control substrate  40 A has a configuration that prompts the initiation of a reset operation in the second control substrate  40 B when an AC OFF signal is received from the first power source device  17 , each of the first control substrate  40 A and the second control substrate  40 B need not determine whether or not the reset operation of a partner substrate has been completed. 
     In the present embodiment, the communication of information in the control configuration of the printer was performed on the basis of a signal potential that is retained between High and Low, but the communication of the information may be performed on the basis of serial communication or the like that uses a command signal. 
     In the present embodiment, the printer as the recording device may be any line head type printer which forms images by fixing either a recording head or a medium and moving the other, and in which nozzles that are arranged in a direction that intersects the length direction of the medium are provided to correspond to length in a direction that interests the length direction of the medium. 
     In the present embodiment, the printer as the recording device may be any fluid ejecting device that performs recording by ejecting or discharging a fluid other than ink (including liquid state materials that are formed by particles of a liquid or a functional material being dispersed, or mixed into a liquid, fluid states such as gels, and solid that can be fluidized and ejected as fluid). For example, any liquid ejecting apparatus that performs printing by ejecting a liquid state material that includes materials such as electrode materials and color materials (pixel materials), which are used in the manufacturing of liquid crystal displays, EL (electroluminescence) displays, surface-emitting displays and the like in a dispersed or dissolved form may be used. In addition, a fluid form material ejecting apparatus that ejects a fluid form material such as a gel (for example, a physical gel), or a granule ejecting apparatus (for example, a toner jet type printing apparatus) that ejects a solid of which a powder (a granular material) such as toner is an example of, may be used. Further, it is possible to adopt the present invention in these kinds of fluid ejecting devices. Additionally, in the present specification, “fluid” refers to a concept that does not include a fluid that is formed from gas only and for example, includes liquids (inorganic solvents, organic solvents, liquid solutions, liquid resins, liquid metals (metallic melts)), liquid state materials, fluid state materials, granular materials (including powder and granules), and the like. 
     The entire disclosure of Japanese Patent Application No. 2014-045722, filed Mar. 7, 2014 is expressly incorporated by reference herein. 
     REFERENCE SIGNS LIST 
     
         
           12  Base platform as an example of a support unit 
           13  Support surface 
           17  First power source device as an example of a first power source 
           20  Liquid ejecting unit as an example of a recording unit 
           23  Second power source device as an example of a second power source 
           26  Carriage 
           32  Recording head 
           40 A First control substrate as an example of a support control unit 
           40 B Second control substrate as an example of a recording control unit 
         P Medium