ELECTRICAL TROUBLESHOOTING (Continued)

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

Remedy

First check to see if proximity light comes on. When the light is on, it means that there is electricity coming to proximity switch. Actuate prox switches with steel tool to take measurements.

Reason

The light coming on shows the proximity is getting electrical contact.

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).

Proximity light on0 Volts DC

Proximity light off12 Volts DC

Proximity light on0 Volts DC

Proximity light off12 Volts DC

Replace proximity switch if the voltages do not read as above.

PROBLEM--Insufficient hesitation at carriage stops prior to reversing traverse.

The dwell time on the traverse drive control not set properly.

Reset dwell time as required. One increment increases Dwell time by 1/2 second.

PROBLEM--Traverse changes directions erratically while running in traverse cycle.

Loose wire to proximity switch.

Check wire connections from the proximity switches and tighten down screws.

A loose wire connection will give intermittent electrical contact.