I read the update and it occurred to me that perhaps the static issue is due to the plastic sled itself. When plastic is sliding across any surface, it has a tendency to create allot of static on some material more than others. What if a wooden disc the same size as the sled was cut, adhered to the bottom of the M4 and run? Since the M2 does not have any issues with static, maybe this can be a fix for the M4? Basically, making a wooden overlay for the M4 sled to prevent static.
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Or even better, mold it out of conductive plastic and connect it to the same earth ground that grounds the conductive vac adaptor and vacuum hose…
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I was wondering this too.
Makes me think of the benefits of using a wooden interface like Sylvain_Dorais created to mount his vacume hose isolates static from vac from sled: Working with FluidNC / Maslow4 - #6 by Sylvain_Dorais
Luckily I think we’ve never actually seen the issue happen except when actually cutting wood which makes me pretty sure it’s something to do with the router and or vacuum. It’s possible that the sawdust itself also makes a difference
Not sure if that is a fix, but I never had static issue
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I was only suggesting it because I have seen alot of people complain about static etc.
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