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8.0
Follower Arm/ Dancer Options
The DFC-90 is factory adjusted to provide full reverse current with 0 vdc input. If some other current is
desired with 0 vdc input, the minimum current potentiometer may be adjusted by cutting out the hole
shown on the label and then using a trimpot adjustment tool. Modifying this setting will cause the clutch /
brake drag torque to be higher than expected and is not recommended.
9.0
Troubleshooting
9.1
Follower Arm Applications
Symptom
No clutch / brake
No AC power.
output.
Fuses blown.
Clutch / Brake wires open
circuit.
Remote tension adjust
potentiometer turned full
counter clockwise or not
wired properly.
Remote tension
potentiometer resistance is
less than 10 kohms.
DFP, DFP-2 position sensor
not wired properly or wires
shorted.
Follower Arm not calibrated.
Clutch / Brake
RUN/STOP switch not
output does not
connected or not wired
increase during
properly.
stop time.
STOP MULTiplier
potentiometer not set
properly.
Remote meter
Incorrect type of meter.
not working.
Meter wires shorted or open.
Possible Cause
Solution or Diagnostic
Verify incoming power is correct
voltage and frequency.
Clutch / Brake wires shorted together
or shorted to ground.
Disconnect clutch / brake wires at the
DFC-90 and check for proper clutch /
brake resistance between the wires.
Verify tension pot wiring, turn tension
adjust pot full clockwise and follow
the calibration procedure in section
5.3.
Voltage between terminals 20(+) and
22(-) should be greater than zero and
should change as the DFP or DFP-2
is moved through its travel.
Use a 10 kohm potentiometer for the
Remote tension control.
Verify position sensor is wired
properly and follow the calibration
procedure in section 5.3.
Voltage between terminals 24 and 26
should be 10 vdc.
Voltage between terminals 25 and 26
should change as the DFP or DFP-2
is moved through its travel.
Follow the calibration procedure in
section 5.3.
Verify RUN/STOP switch wiring.
Turn STOP MULT potentiometer
clockwise to increase the stopping
torque.
Meter should be a current meter with
1 ma full scale and no more than 3
Kohm resistance.
Disconnect meter wiring at the DFC-
90 and check for proper meter
resistance between the wires.
8
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