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Topic starter
19/03/2015 2:26 am
I am having an intermittent problem with the 312 drive. I get a 404 flt every 4 to 8 hrs. I have changed the DSP, ribbon cable in the controller and the input/output board in drive. I am at a loss. Any help out there?
19/03/2015 4:49 am
Issues with the brushes, armature, main contactor. Check your entire loop circuit for grounds or trace grounds
19/03/2015 6:39 am
I agree with E311. Make sure your brush rigging, insulators and armature is clear to ground. What kind of machine?
Topic starter
19/03/2015 11:59 pm
Thanks for the info. Found the problem. The PS1 power supply for the card rack was dropping the 5 vdc and the +/- 12 vdc to the card rack for about 5 to 10 seconds causing the reference error.
20/03/2015 6:37 am
Wow, good find! Its amazing how those of us who cut our teeth on relay logic, now find that we have to worry about power supplies- they have bitten me in the hind quarters many times 🙂
20/03/2015 7:50 pm
You can say that again 311. Any weird problem that is not obvious right off the bat I go to the power supply. Especially on 312 drives the power supply on the drive is a source of so many problems we keep a pretested spare on the jobs to rule that out first. And remember even if it reads good switch your meter over to AC and look for bleed thru. Just a little AC will drive you crazy.