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PROBLEM--If the carriage traverses to one end of stroke or the
other and it stops and does not reverse direction.
Possible Cause
Proximity switch is not
working properly or wire
connections are loose
The dwell time on the
traverse drive control not
set properly.
Loose wire to proximity
switch.
Remedy
First check to see of proximity light
comes on. When the light is on, it
means that there is electricity coming
to proximity switch.
Actuate proximity switches with steel
tool to take measurements.
Left proximity (PROX1) check
Traverse drive Control (TDC) between
terminals #14 (black wire) and #15
(brown wire).
Right proximity (PROX) check (TDC)
between terminals #13 (black wire) and
#15 (brown wire).
Reset dwell time as required. One
increment increases Dwell time by
1/2 second.
Check wire connections from the
proximity switches and tighten down
screws.
Reason
The light coming on shows the
proximity is getting electrical contact.
Proximity light on-
0 Volts DC
Proximity light off-
12 Volts DC
Proximity light on-
0 Volts DC
Proximity light off-
12 Volts DC
Replace proximity switch if the
voltages do not read as above.
A loose wire connection will give
intermittent electrical contact.
PROBLEM--Insufficient hesitation at carriage stops prior to reversing traverse.
PROBLEM--Traverse changes directions erratically while running in traverse
cycle.
ELECTRICAL TROUBLESHOOTING (Continued)