Patent ID: 6336054
Filing Date: 2002-01-01
Classification: H01L

Abstract:
A processing system for processing a substrate comprising:a plurality of processing machines for subjecting various processings to the substrate; a transfer machine movable along a transfer path for transferring the substrate to the processing machines; a drive unit for driving the transfer machine; and a control unit including a memory for storing a teaching threshold in a teaching mode and a practical operation threshold in a practical operation mode that is higher than the teaching threshold, and a controller monitoring a parameter representing a moving state of the drive unit to stop the drive unit when the parameter exceeds the practical operation threshold while operating in the practical operation mode and when the parameter exceeds the teaching threshold while operating in the teaching mode, wherein said drive unit includes a servo motor for driving the transfer machine, and said control unit includes means for generating an instruction pulse for driving the servo motor, a servo signal for turning the servo motor on or off, and a parameter-change signal for switching parameters from the teaching mode to the practical operation mode, and vice versa, wherein the drive unit is switched to the teaching mode when the parameter-change signal is turned off, and wherein the control unit sets a torque value and an acceleration value of the servo motor in the teaching mode to a value lower than a rated torque value of the practical operation mode.