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5.1.2. Cal. Speed Adjustment
This adjusts the command voltage input levels so they match the controllers output
levels. In other words, if the controller puts out 8.5 volts for a 3000 rpm command, the
drive must be adjusted to deliver 3000 rpm with an 8.5 volt command. The adjustment
range is from 75% to 140% of the DIP switch (SW1/1 setting) 3000 / 6000 rpm. The
adjustment procedure for the Cal. Speed is as follows:
Perform the Offset adjustment
If the position controller can be set up in an open position loop mode do so now
and follow step 1 through 5 to complete the calibration.
If the position controller cannot be set up in an open loop mode follow steps a.
through f.
Cal. Speed adjustment in open loop mode.
1.
Apply 10% of the max command to pins 7 and 8.
2.
Verify correct speed.
If the controller allows viewing the actual motor speed then monitor it and
adjust the Cal. Speed pot until the correct speed is observed ±5%. If the
controller doesn't allow viewing the motor speed then use a tacho-meter on
the motor shaft or use the drive's tach output signal. See Table 3-E.
3.
Apply 25% of the max command and verify the speed per the above.
4.
Continue increasing the command signal level in 25% increments and
verifying / adjusting Cal Speed until 100% command signal is achieved.
5.
Follow the above procedure in the opposite motor direction to verify there is
no signal offset. Check for velocity offset. A difference of up to 5% between
CW & CCW is acceptable. Any more than 5% difference may indicate a
resolver phasing shift or a tachometer problem. The system will run but not at
optimum performance.
Cal. Speed Adjustment with closed position loop controller.
a.
Adjust the position controller loop gain to a value below normal. This will
allow more accurate adjustment of the Cal. Speed setting.
b.
Apply 10% of the max command to pins 7 and 8.
c.
Verify correct speed.
If the controller allows viewing the following error, then monitor the following
error and adjust the Cal. Speed port until the correct amount of error is
observed. If the controller is designed with feed forward command, this
error should be near zero.
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Section 5– Page 3
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