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28-04-2009 #1
When I had my wiring disaster recently, it was probably only the opto-isolators that prevented me damaging my SmoothStepper. Personally, I wouldn't risk not having isolation.
The opto-isolated BOB's sold by DIY-CNC and Zapp are very good quality & well worth the money IMO. Backup from Roy at DIY-CNC is first class. I have one of their Uniport's as I needed three relays (Router, Extract and laser cross) plus I like the idea of a charge pump to make sure nothing moves while the laptop and Mach start up.
Good luck with the build Dave.
Regards, Jeff.Nothing is foolproof......to a sufficiently talented fool!
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