Operation and Maintenance Manual Rev M(ii) 4/03
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Door Interlock Check
(All models except PVA250™, PVA750™, PVA2000C)
If you experience a failure at step 14 of the Power Check, follow this procedure:
1) Engage the Door Bypass switch. If CRM-1 engages when the Door Bypass switch is engaged, there
may be a failure in the left door interlock switch, the right door interlock switch, or their wiring.
2) Check for a red indicator light on the 5 V Monitor relay SSR-5. If the indicator is not lit, there may be
a failure in the 5 V monitor relay or its wiring.
3) Check for 24 VDC between 504 (+) and 302 (-). If 24 VDC is not present, there may be a failure in the
5 V Monitor relay, the EMERGENCY STOP push button PB-1, or their wiring.
4) Check for 24 VDC between 505 (+) and 302 (-). If 24 VDC is not present, there may be a failure in the
left door interlock switch or its wiring.
5) Check for 24 VDC between 506 (+) and 302 (-). If 24 VDC is not present, there may be a failure in the
right door interlock switch or its wiring.
6) If 24 VDC is present between 506 (+) and 302 (-), there may be a failure in the coil of CRM-1 or a
short in its associated diode D-1, or there may be a failure in the coil of CRM-2 or a short in its
associated diode D-2.
Encoder Feedback Test
(All models except PVA250™, PVA750™, PVA2000C)
Use this procedure to test the encoder feedback for all of the axes. If a problem is found with any of the
encoders repair and report the error to the production supervisor.
Most encoders used with the workcell generate 5080 counts/inch. Check to make sure that the position
feedback is reasonable.
(500*4 counts/rev)*(1 rev/cm)*(2.54 cm/in) = 5080 counts/inch.
1) Open a terminal program and establish communication with the DMC-1500 controller.
2) Turn the machine OFF. Disconnect the black motor power cables. Leave the orange encoder feedback
cables attached.
3) Move all of the axes to the center of travel position.
4) Turn the machine ON.
5) Enter HX.
6) Define the current position as (0, 0, 0, 0). Enter DP*=0.
7) Move the X axis in the positive direction and display the current position. Enter TP.
8) Move the X axis in the negative direction and display the current position.
9) Move the Y axis in the positive direction and display the current position.
10) Move the Y axis in the negative direction and display the current position.
11) Move the Z axis in the positive direction and display the current position.
12) Move the Z axis in the negative direction and display the current position.
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