I promised to report back so...
I fitted the filter (Schaffner FN2030 Series 16A 250 V ac 400Hz) on the
VFD mains input and that did make a difference. My failing case job ran
70% of the way through where without it the job failed 10% in. Not the
complete solution though.
I then tried a ferrite core (mains clipon stylee) on the input of the
field power supply. No difference. A ferrite core (ring with both
wires looped through it a couple of times) on the output of the 12V
field power made no difference either.
A ferrite core (ring as above) on the limit switch wires fitted at the
Mesa end made no difference either.
So... finally I replaced the limit switch wires with shielded cable
(grounded only at the Mesa end). That seemed to do the final trick and
the job ran all the way through.
Of course I don't know if this is a 100% fix or just enough to get
through my failing case (other jobs without all the above have run
fine). I guess time will tell.
Hope that's useful for someone.
--
Regards,
Russell
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| Russell Brown | MAIL: [email protected] PHONE: 01780 471800 |
| Lady Lodge Systems | WWW Work: http://www.lls.com |
| Peterborough, England | WWW Play: http://www.ruffle.me.uk |
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