Trolley Continuously Moving Forward #
- wheelblastIT PLC Heartbeat pulse is missing
The wheelblastIT PLC must be power-cycled to return to normal operation.
- To power-cycle the PLC, toggle off, then on, circuit breaker “300” in the WB controls enclosure.
- Once the PLC has completed rebooting, the trolleys must returned to the Home position via the ”Force Reverse” command on the HMI.
- Faults During Trolley Movement
- Trolley Intermittently Failing To Return To ‘Home’ Position
- Excess Voltage Fault – Error Codes ‘OU2’ or ‘OU3’ displayed on VFDs
- Uneven wear on the sides of the belt
- Water Shaft Spinning Inconsistently
Faults During Trolley Movement #
- VFD has experienced a fault
- Examine the VFDs for the potential faults below:
- Motor amperage exceeding a programmed limit (typically 4.0 amps)
- Excess voltage during/shortly after transition from ‘Reverse Fast Speed’ to ‘Reverse Slow Speed’
Trolley Intermittently Failing To Return To ‘Home’ Position #
- Excess amperage fault
- Examine the trolley assembly and inspect the wheelblastIT’s moving components for the potential issues below:
- Motors/pulleys seizing
- Material binding between gears
- Failed spur gear
Excess Voltage Fault – Error Codes ‘OU2’ or ‘OU3’ displayed on VFDs #
- “OU2” indicates excess voltage during deceleration
- “OU3” indicates excess voltage when running at constant speed
- Reduce ‘Rev Fast Speed’ or ‘Rev Fast Speed’ or increase ‘Rev Slow Speed’
Uneven wear on the sides of the belt #
Idler and drive pulley shafts are not aligned at right angles (perpendicular) to the rails, causing the belt to rub against the pulley sidewalls
- Shaft alignment is adjusted by:
- Slightly loosening the plastic flanged shaft bearing assemblies with two 9/16” wrenches
- GENTLY tap the shaft ends with a hammer
- Tighten the bearing bolts before putting the trolley into test mode “Continuous Move”.
- Put the trolley into ‘Continuous Move’ mode
- Observe belt position and ensure there is always at least a small gap between the belt and pullet sidewalls
Water Shaft Spinning Inconsistently #
- Misalignment of spur gear and toothed rack
- Water shafts assembled with spur gears cannot be switched between driver and passenger sides.
- When installing a new one-way bearing, ensure the bearing faces the correct direction for its use on the driver or passenger side.
- A fully assembled spur gear and water shaft assembly has the spur gear key slot facing the vehicle.
- The key slot side of the spur gear should be 4-3/8” from the 3-nozzle end of the water shaft.
- The driver side one-way gear should spin freely counterclockwise when viewed from the wall end of the water shaft.
- The passenger side spur gear should spin freely clockwise when viewed from the wall end of the water shaft.