Patent ID: 6892959
Filing Date: 2005-05-17
Classification: B05C,F04B

Abstract:
1. A system comprising: a fluid dispensing pump including a feed screw driven by a motor having indexed rotational positions, wherein the feed screw includes a helical cavity defined between a major diameter and a minor diameter of a thread of the feed screw, and wherein the fluid dispensing pump further includes a cartridge having a cavity in communication with the feed screw for introduction of dispensing fluids into the helical cavity; a position controller for controlling the position of the pump relative to a substrate, the position controller generating a time-duration-based pump control signal; and a dispersing controller for controlling a dispensing operation of the pump, the dispensing controller initiating the dispensing operation in response to the pump control signal by generating an index signal for the motor for initiating rotation in the motor based on the indexed rotational positions.