Rockwell Automation 8510 AC Spindle Drive System User Manual - Manual (Page 106)

Start-Up
Chapter 9
9-102
The orient operation always starts by slowing to the orient speed,
locating the marker on the feedback encoder, and then starting decel
on the following revolution. Shorter orient times can usually be
achieved if the Orient Speed parameter is set relatively high. With a
setting of 300 rpm, final decel to the orient position should begin
within 200 ms of reaching the orient speed. Adjust the value of
Orient Start to give a quick decel without overshoot. With Orient
Speed set at 300 rpm, a value of 120 degrees for Orient Start gives a
position loop gain of 15 per second.
For accurate setup, monitor the torque at test point TP2. If the
maximum load inertias are well defined, the Orient Speed or Orient
Start parameters can be adjusted so that the torque peaks at +10
volts as the decel starts. If setup is being done without tooling or a
workpiece, the maximum torque measured on a machining center
should be +7 volts. On a lathe the maximum torque should be only
+4 volts to assure successful orient without overshoot.
o 18. If multiple gear range data sets are being used, repeat the above
procedure for each data set. If the setups are similar for each gear
range, use the GEAR RANGES – Copy Data function to copy the
initial gear range configuration data to the succeeding gear ranges.