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HA0216T Rev D March 2012
Chapter 5
Trigger Out options are set as follows:
Disabled
– triggering operation is disabled
In Motion (Trig HI)
– The output trigger goes high (5V) when the stage is in motion.
In Motion (Trig Lo)
– The output trigger goes low (0V) when the stage is in motion.
Move Complete (Trig HI)
Move Complete (Trig HI)
- The output trigger goes high (5V) when the current move
is completed.
Move Complete (Trig LO)
– The output trigger goes low (0V) when the current move
is completed.
Max. Vel. (Trig HI)
– The output trigger goes high (5V) when the stage reaches max
velocity (as set using the SetVelParams method).
Max. Vel. (Trig LO)
– The output trigger goes low (0V) when the stage reaches max
velocity (as set using the SetVelParams method).
5.4
Troubleshooting and Restoring Default Parameters
Position PID Settings Summary
Stage overshoots the intended position
- reduce the integral term, and increase the
derivative and proportional terms.
Stage fails to attain final position
- increase the integral and proportional terms.
Motion is unstable
- reduce the proportional and integral terms, increase the
derivative term.
Stage sounds noisy
- reduce the derivative term.
See Section 5.3.3. for further information.
Caution
The PID and other closed loop parameters must be set according to the
stage or actuator type associated with the driver, the load being
positioned and the speed/duty cycle of operation. Default values have
already been optimized and stored within the stage, and these are loaded
into the controller on power up.
If problems are encountered (e.g. stability of the closed loop position
control, lost motion or incomplete moves) the position PID parameters
should be adjusted to tune the stage for the given application. Normally,
only minor adjustment of the Proportional, Integral and Derivative
parameters should be necessary, and some trial and error will be required
before the ideal settings for a specific application are achieved. In cases
where further adjustment of the control loop parameters is required, the
following guidelines are provided in order to assist in the tuning process.