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Carriage Drive

WULFTEC WCRT / WCA
FILM CARRIAGE
TROUBLESHOOTING GUIDE

Wulftec Carriage
PROBLEM
CAUSE
SOLUTION
Carriage does not stop at the top of the load.

The autoheight may be off.

Activate the autoheight.

The photoeye may reflect on something in the background. See Automatic Height sensing.
Carriage does not go up.

The top limit switch on the carriage may be activated.

Readjust the limit switch and / or change the defective switch.

The carriage speed up may be set to zero (0) or too low for the carriage to move. Increase the carriage up (loacted n the second control panel).
Motor fuse may be burned. Check for short. If none found, change the fuse using the appropriate rating.
Drive may be faulted. Reset drive by turning off the power to the machine for 2 minutes then back on.

Carriage stays at the top while the arm continues to turn.

Carriage speed down may be set to zero (0).

Increase the carriage speed down (located on the control panel).

Bottom limit switch on the carriage may be activated. Readjust the limit switch or change the defective switch.
The carriage could be stuck on the dead stops. Pull vigorously on the 2 chains at the same time someone else presses the carriage up button on the touch screen.
Fuse may be burned out. Check for short, if none change the fuse using the appropriate rating.
Motor on film tension never stops turning.

The steel cam is not touching the analog sensor when the dancer bar is at rest position.

Turn the steel cam closer to the analog sensor or move the analog sensor toward the cam. The analog sensor and the cam are situated under the red cover on the film carriage.

The minimum speed trim pot on the pre-stretch drive is not set to minumum. Turn the minimum speed trim pot counter clockwise on the pre-stretch drive.
The tension adjustment spring on the side of the carriage is set too light. Increase the pressure on the spring by turning the knob clockwise.
The clamp is open. Close the clamp
Motor on film tension never turns.

The motor fuse is burned.

Check for short. If none, change the fuse using the appropriate rating.

The motor breaker is off. Turn on the motor breaker.
The fuse on the analog board is burned. Check for short. If none, change the fuse using the appropriate rating.
Analog sensor may be defective. Contact technical service at CAPS.
Drive is faulted.

Reset drive by turning off the power to the machine for 2 minutes then back on.

AUTOMATIC HEIGHT SENSING

All Wulftec automatic machines are equipped with a diffuse photoeye on the carriage, for load height sensing for which you have a switch. A second photoeye may be located on the top platen. It is this photoeye that will override the carriage photoeye when top platen is used. These models have a reflector on carriage cover. This allows for variations in load heights, while maintaining the predetermined "Overwrap" setting. All machines are equiped with manual override (limit switches)

Note: When using a 30" carriage with a 20" film on the machine, the autoheight photeye does not work on small load higher than 20" and smaller than 33".

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