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Stepper motor 2 cable not detected (error 23323)

Product

  

Trendsetter VLF Autoloader

Component

  

Conveyor

Error

  
  • Error 23323: Satellite Control: Stepper Motor 2 cable not detected
    (Motor 2 is in the conveyor) This is the error that appears most frequently.
  • Error 22202: Autoloader2: GENINE 1 satellite board J4: PX-Axis Safe-Home Sensor cable disconnected
  • Error 22202: Autoloader2: GENINE 4 satellite board J25: Conveyor Belt Stepper Motor cable disconnected
  • Error 23323: Satellite Control: Stepper Motor 0 cable not detected
    (Motor 0 is the x-axis)
  • Error 23323: Satellite Control: Stepper Motor 1 cable not detected
    (Motor 1 is the y-axis)

Symptoms

  

Noise occurs on the CANbus at the PDB end and at the conveyor GENINE end, but is worst at the GENINE end.

Cause

  

The abundance of CANbus related errors indicates that the problem is not isolated to a single GENINE board. Interference (noise) was probably disrupting the CANbus signal going to the PDB. The disruption was apparent once a scope was attached to the conveyor cables.

Solution

  

Here's what Steve Hawkins, CSE in Australia, did when faced with these error messages (in his own words):

I set up my scope and could see the digital CANbus signals, looked likethe heartbeat signal and other ommunications when they talked to each other. But I also noticed that additional noise of a regular nature appeared when the plate was entereing the processor, just about at the time the error occurred.

I then noticed this additional noise disappeared soon after the plate entered the processor (left the conveyor). Upon further investigation, I noticed it stopped exactly at the time the trailing edge fell off the conveyor and fell onto the chain belts of the pre heat oven.

Next plate I watched it like a hawk. The noise appeared on the scope trace as soon as the leading edge of the plate hit the chain belts on the pre heat oven and disappeared when the trailing edge fell off the conveyor and onto the chain belts of the pre heat.

I noticed the edge of the conveyor was worn down to bare metal along its edge, so we put some 'glass tape' (durable tape) along this edge to insulate the conveyor from the pre heat chains when connected by the plate and this erroneous signal disappeared altogether.

Technical contact(s)
  

Angus Gillon
Submitted by
  

Steve Hawkins
Date submitted
  

15 Oct 2003

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