Re: VFD spindle works, then doesn't
What are your relays controlling? On my machines relays ONLY trigger the forward and reverse inputs on the VFD.
On some Chinese machines I have I had to replace a couple relays on spindle circuits when they were new or nearly new, but then haven't had any further problems. Just bought plug in replacements off Amazon. I bought extra relays since just about all the relays on those machines were the same. I did have one major issue though. Amazon sent me five relays and a stick. No. I'm not kidding. An actual stick. It had a label on it that said it was a relay, but it was really a bamboo novelty store flute. The kind that's worth about 2 cents and you might find in a junk store for 99 cents. I kindly let Amazon know that calling a stick a relay doesn't make it a relay and they took care of it. I hope the next person is also smart enough to recognze that a stick with a relay sticker on it is still a stick.
Bob La Londe
http://www.YumaBassMan.com