Rockwell Automation 8510 AC Spindle Drive System User Manual - Manual (Page 125)

Troubleshooting
Chapter 11
11-121
Table 11.D (Continued)
Problems that Occur when AC Power is Applied
1. Check +5V test point on Main Control Board. Should be +4.75V
to +5.25V. (Note: test point is before the 5.0A fuse in the circuit).
2. Check +15V test point on Main Control Board. Should be
+14.25V to +15.75 V.
3. Check –15V test point on Main Control Board. Should be
–14.25V to –15.75V.
4. If any voltages are out of tolerance or missing, replace Main
Control Board (Gate Drive Board on A04/A06 drive).
1. On Main Control Board (Gate Drive Board on A04/A06 drives),
check test points S1 and S2 for excitation sine waves (these will
not be smooth, but will have a staircase look). See Figure 11.3
for typical resolver waveforms. If waveforms are not correct,
then unplug the resolver cable connector, CN3. If the
waveforms are now correct, then the resolver cable is miswired
or the resolver is malfunctioning. If the waveforms are still not
correct, replace the Main Control Board (or Gate Drive Board).
2. Check test point R1 for a smooth, clean feedback sine wave. See
Figure 11.3 for typical waveform. If R1 waveform correct,
replace Main Control Board (or Gate Drive Board)
3. If R1 waveform is missing or incorrect, check resolver wiring. If
wiring OK, replace motor/resolver.
Possible Solutions Probable Cause Problem
AC Phase Loss
displayed - Loss of
one phase of
incoming AC line
detected by drive. An incoming 3 phase line is
open. Measure all phase to phase voltages. Check all incoming line
connections for tightness.
Malfunctioning AC control
power fuse. Check fuses FU3R, FU3S, and FU3T.
1. Check seating of Interconnect Board into board connector CN8
(CN16 on A04/A06 drives).
2. Remove Interconnect Board from CN8 and inspect contacts in
both connectors to assure that they are making proper contact
with the Interconnect Board. Make certain it is plugged back in
correctly, so that “blank side,” if any, is towards outside of drive.
3. Remove Control Boards and check tightness of incoming power
connections to Power Board. Check for other loose power
interconnects.
Malfunctioning printed circuit
board. If problems were not found with other tests, replace Main Control
Board (Gate Drive Board on A04/A06 drive).
No.
4
5
6
Malfunctioning drive
interconnections or hardware.
If problems were not found with other tests, replace main Power Unit. Faulty Power Unit.
Power Supply
displayed - An
internal power
supply voltage that
is missing or out of
tolerance was
detected. Low voltage power supply
malfunction.
Resolver Loss
displayed - Im-
proper or no
signals from motor
resolver have been
detected. 1. Verify that the resolver feedback cable is plugged into connector
CN3.
2. Verify that the resolver connector in the motor terminal box is
properly inserted.
3. Check each connector to verify that it is wired according to the
8510 User Manual.
Incorrect wiring to resolver.
Resolver waveforms not correct.