Appendix A
Manual Tuning
Manual Tuning A-1MN1276
TUNING
This appendix presents guidelines for manual tuning the Control. Tuning is
necessary, since a various loads (friction and inertia) will effect the drive response.
Response may be defined as the time required for the drive to reach speed.
Various software “tools” are available to make tuning easier, such as:
Internal libraries (easy definition of parameters),
pole placement (the software calculates a “no--overshoot” response),
plotting routine (the drive response is displayed on a screen).
This information is as a guide only and the exact response is entirely up to the
individual performing the tuning.
TUNING GUIDELINES
The Flex control is easily tuned using a laptop computer and Flex software. The
autotuning procedure provides a stable and responsive drive, by adjusting the
parameter values for velocity loop tuning. The autotuning procedure will work for
most applications. Manual tuning however may be desirable when very tight
response is required. These guidelines provide a basic reference starting point for
any additional adjustments.
General Tuning Rules
Tune the velocity loop first, and then tune the position loop (when using
pulse/direction, or position follower mode). The velocity loop should always be
tuned before the position loop, as velocity loop tuning affects the position loop
response. To reduce mechanical resonance, use a stiffer mechanical coupling or
decrease the low--pass filter value.
Manual Tuning
Manual tuning may be used to adjust the response of the control. Two types of
manual tuning are possible: velocity tuning and position tuning (for a system which
has been set up to operate in either the pulse/direction, or position follower mode).
Initial Settings Required
Before manual tuning can begin, the motor, control, and operating mode must be
set. Make sure that these parameters have been selected and downloaded.
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