conveyor system - troubleshooting guide...conveyor is noisy or oscillates between forward and...

LAST UPDATED: 02/17/2020

Conveyor System - Troubleshooting Guide

Introduction

Exploded View

Symptom Table

1. Conveyor2. Drive Motor3. Power Cord4. Conveyor Drive Shaft /Sprockets5. Belt6. Belt Tensioning Screws

1. CONVEYOR TROUGH COVER2. GASKET3. CONVEYOR TROUGH4. DOUBLE CHAIN LINK OUTER5. SINGLE CHAIN LINK OUTER6. CHAIN SPACER7. BELT PIN8. CHAIN LINK INNER9. BELT PLATE

10. CONVEYOR TUNNEL INSERT11. CONVEYOR BRACKET12. HHB 5/16-18 X 113. CONVEYOR RAMP COVER TOP14. CONVEYOR RAMP COVER SIDE15. CONVEYOR RAMP16. CONVEYOR CHUTE17. CONVEYOR TROUGH EXTENSION18. BHCS 5/16-18 X 1 SS


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SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION

The circuit breaker is tripped. Check for a short in the motor or thecable.

No power from I/O PCB to themotor.

Verify voltage at I/O PCB and themotor.

Blown fuses (I/O-version R andearlier). Check the fuses on the I/O PCB.

The conveyor does not start.

The conveyor motor capacitor isdefective. Inspect motor capacitor for damage.

There is a build up of chips. Clear excessive chips and anyobstructions.

The conveyor belt is damaged. Inspect conveyor belt and repair orreplace.

Conveyor is noisy or oscillates between forward andreverse.

The conveyor belt tension isincorrect. Adjust the belt tension.

Motor Cable Inspection

Corrective Action:

Inspect the motor cable for any sign of damage.Check for burn marks at the plug. This could becaused by coolant contamination.

Measure the Ohms the across the motor powercable leads [1] at the plug. There should beresistance leg to leg. An open reading suggests abad motor or cable.

Measure the Ohms on the motor power cablefrom each power leg to the ground leg [2] of theplug. This reading should be open.

If cable shows a short leg to ground at the plug,disconnect the power cable at the motor andcheck each motor power lead to the motorchassis [3]. If reading is open, the cable is at fault.If any lead tests short, the motor is motor isshorted.


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Voltage

Fuses

Corrective Action:

Find the chip conveyor motor cable 140 at the I/OPCB. Press [CHIP FWD]. Use a multimeter withneedle tip probes to measure the voltagebetween the black and red wires on the cable.

Have someone press and hold [CHIP REV].Measure the voltage between the black and whitewires. When the I/O PCB operates correctly, eachvoltage reading is 240 VAC.

If the voltage at the I/O PCB is correct, open theconveyor motor junction box. Use a multimeterwith needle tip probes to check for voltage on thepower leads at the motor.

If there is no voltage, check the motor and thecable. If there is voltage, check the capacitor. Ifyou verify the voltage and capacitor are correct,inspect the motor drive shaft and keyway.

Corrective Action:

Check these fuses at the bottom right corner ofthe I/O PCB (Fuse type: AGC 5 amp):

• Single phase motors: FU2 [1] /FU3 [2].There should be no fuse in FU4 [3].

• 3 phase motors: FU2 [1] /FU3 [2] /FU4[3]

A short in the motor or the cable could haveblown the fuse


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Capacitor

ChipsCorrective Action:

Clear chips and obstructions. Make sure the conveyor settings are optimized for the chips that are produced.

Belt Inspection

Belt Tension

Corrective Action:

Inspect the conveyor motor capacitor fordamage. A damaged capacitor will usually havesigns of deformation or bubbling on the capacitorcasing. This could be caused by a short in themotor or in the cable.

Open the motor junction box. Check thecapacitor. Look for burn marks on the case.

Measure the capacitor. Most multimeters canmeasure capacitance upon manual activation(turn to the correct units of measurement, andpush the yellow button). It should be 6 or 9microfarad as noted on the capacitor's case.

Corrective Action:

Inspect the conveyor belt for damage.

Corrective Action:

Make sure the belt tension is correct. Refer to thedecals on the side of the machine. The correctbelt slack for Jorgensen conveyors is 0.25" - 0.38"(6 - 10 mm). The correct belt slack for Hennigconveyors is 0.12" - 0.25" (3 - 6 mm).


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Electrical Diagram


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conveyor system - troubleshooting guide...conveyor is noisy or oscillates between forward and...

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