M&R 12 COLOR, Manual

Page: 133 / 241

Troubleshooting Procedure
PROBLEM PROBABLE CAUSE/SOLUTION
Indexer shudders or is excessively
noisy when cycling up or down.
The print station complete the print
cycle, however the index table does
not lower.
The electrical and pneumatic power
supplies to the equipment are con-
nected, but the index table does not
operate.
The index table rotates, however the
table assembly does not lift into
print position.
1. The main index shaft bearings require lubrication. Lubricate the index shaft bearing
with white lithium grease. There are two zerk grease fittings provided on the center
index shaft for this purpose.
1. One or more of the proximity switches on print stations is defective or mis-adjusted.
Once it has been determined which proximity switch or switches are at fault, check
the switch to see if it will operate using a piece of metal to trigger the switch. If the
L.E.D. illuminates on the side of the proximity switch, adjust the distance between
the proximity switch tip and the actuator flag on the print carriage assembly for con-
sistent operation.
1. The Emergency Stop push button has been activated. Pull “out” the red Emergency
Stop push button, and press the green “Reset” push button to resume operation.
2. One of the yellow safety cords between print stations is disconnected. Check to be
sure all yellow safety cords are properly connected. Clean away any ink that may
have accumulated on the safety cord surface.
3. The indexer drive assembly is out of position. Push the “Reset” button for the servo
motor to return to the “Start” position. Press the “Reset” button for one second.
4. The carousel is located in the wrong position. Carousel arms are not located in the
correct position. Manually move the index table into the lock position, the index cle-
vis will lock into place.
5. Index “ON” proximity switch is damaged or mis-adjusted. Check to see if the L.E.D.
indicator light on the side of the proximity switch illuminates when the index cam fol-
lower locates in front of the switch. If it does not adjust the proximity switch with two
11/16” open-end wrenches until the L.E.D. illuminates.
1. Index “ON” proximity switch is damaged or mis-adjusted. Check to see if the L.E.D.
indicator light on the side of the proximity switch illuminates when the index cam fol-
lower locates in front of the switch. When the index cam follower is not not in front
of the proximity switch, you should not see the L.E.D. indicator illuminate If the L.E.D.
stays on constantly, replace the index ON proximity switch.
2. Lift valve solenoid coil on Mac valve is defective. The lift valve solenoid coil on the
Mac valve may have failed. Remove the base access cover on the indexer and man-
ually activate the valve by pushing the white over-ride/test button. If the indexer goes
up and down the valve is fine. Locate wires #2 and #Y42 and inspect the wires from
the control box. Using a volt meter, they should read 110 volts AC. If voltage is pre-
sent, replace the solenoid. If voltage is not present check for broken or open/loose
connections. The test should be taken after the press has finished rotating (index-
ing).
M&R Printing Equipment, Inc. - Glen Ellyn, Illinois
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