On Sunday, October 16, 2011 11:13:08 AM Andy Ibbotson did opine:
> Hi
> I have my BF30 up and running EMC2 but I'm having problems with EMC
> noise. When I switch on the shop fluorescent lights they cause the
> motors to "jump" anyone got any advice re. shielding. All signal cable
> screens are grounded to the 7i43 (PC) ground. Link to Control box from
> PC is by a 1m bought 25Dsub cable. Motor power wires are 4core
> screened cables, screens are at PSU ground (isolated from Geckos and
> PC). Any help or advice will be appreciated.
Are the shop lights sheet metal parts well grounded?
Or said another way, is the rapid start a bit slow? If a slow starter,
does it start instantly when you reach up and touch the lamp? All symptoms
of poorly grounded fixtures.
If not well grounded, their startup voltages could possibly radiate. Most
of those depend on a well grounded housing in order to start rapidly, and
is often the reason the lamps are fitted so close to the sheet metal.
Stand them out another cm from the sheet metal and that ballast may not be
able to start them.
That PSU ground should probably be tied at the 7i43 ground, if not that
could make an entry point for noise.
> Machine is in the UK.
> Regards
> Andy
Cheers, Gene
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