'spindle speeds'

star123 (220.226.172.202) -

Hi guys, My friend have a new trm with a 4000 rpm spindle running single phase in my garage. Today when I was cutting some allum the spindle started to wander about 40 to 60 rpm. It would go from 3300 to 3350 or 3270 (roughly). When I would chenge the spindle spped on the knob it would do the same at the new speed +- 40 to 60. when I ran it at 4000 (with the knob) it seemed solid. what would cause this. Could it just be a voltage surge or something (seperate from my machine) The x and y axis were running fine

Comment #1 Brandon from Raleigh -

Your vector drive might be going out. I know baldor makes one for fadal machines, but im not sure how much they are. I used to run a fadal at my old job and it did the same thing you were describing. It was a bad motor drive.

Comment #2 mark (76.173.26.3) -

I have a trm and had that also. They all do it. I had a tech out from fadal in chatsworth. its not a problem

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