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DMD870 Digital Stepper Drive
User's Manual
Ki: Integral Gain. Integral Gain helps the Drive to overcome static current errors. A low or
zero value for the Integral Gain may have current errors at rest. Increasing the Integral Gain
can reduce the error. If the Integral Gain is too large, the systems may "hunt" (oscillate)
about the desired position.
Start button: The user can start a Step Response test by clicking this button. Start/Restart a
Step Response test to get an optimum response like Figure 12, and remember to save the
settings to the Drive when finish tuning. See Figure 14.
Figure 13: Kp=543, Ki=0 (poor performances)
Figure 14: Finish tuning and save setting to the drive
Motion Control Products Ltd.
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