Troubleshooting
© 2016 Hirschmann Automation and Control GmbH · Mobile Machine Control Solutions · www.beldensolutions.com 40/161
qSCALE i2 Cranes (Tool Version 3.0.34) Service Manual / Issue B / 11-2017 / ac.
3.2.6.3 Length Potentiometer Troubleshooting
The length sensor is a potentiometer that is driven by a gear drive from the cable drum. As the length
changes, the cable drum will turn and with it, the potentiometer’s axle.
The CAN Bus Converter Board the length and A2B signals to CAN, and acts as a junction to the angle
sensor. The length sensor will be connected to X20.
Fully retract the boom and turn the shaft of the length potentiometer opposite of the cable payoff with a
small screwdriver until it comes to a soft stop. That should bring the sensor voltage to 0V (+/- 0.1Volt)
between Pin 3 (-) and Pin 2 of connector X20.
NOTE
After this step is done, the length sensor needs to be calibrated.
Go back to your indication screen and compare length indicated and actual length again. If zeroing the
length potentiometer and recalibrating did not resolve the issue (indicated length varies more than 0.3
feet from actual length), continue.
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