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Applying power to an induction motor while it is still turning in the opposite direction is called a plug stop. Often these snubbers where fitted to this kind of application, now it is common to see the R/C network added to 3 phase reactors in VFD applications. Al.

ok i went out and bought a printer 25 pin mod for the pcu wil try it now

I just don't want them to be too weak. I'd rather pickup a better drive and stepper if the 540 will only do a mediocure job because of being under powered. And by under powered I mean the steppers and drive combo not being sufficient to cut aluminum. However if the 540 will do it im happy because that setup is a steal and i like how everything is integrated into 1 unit. Sorry for my newbish questions but I have a few more: What are...

You can always have extra Amp capacity and it won't hurt anything. The BOB will just draw what it needs--But you wouldn't want to have a PSU rated for LESS Amps than the BOB needed. BTW: There is no better driver for X2 than the G540. This is what I recommend: $289 G540 http://geckodrive.com/product.aspx?c=3&i=14469 $147 Three $49 KL23H2100-35-4B 381 oz motors for X, Y & Z $060 One KL-350-48 48V/7.3A power supply....

Try and complete the help page which George has pointed you at. This will help confirm that it is a stepper and the drive notation required. You won't need the Gecko current capability as this is a very small motor. Look towards using an IC direct drive. George that Java sheet is brill - thanks. Regards Pat

It may be electical/electromagnetic noise. You might try putting an EMI filter in the power to the router just as close to the router as possible. Here is a link to one from Digikey http://parts.digikey.com/1/parts/120...maw120522.html They have others of course. I don't know how much current your router draws, but the filter current would have to be rated higher than the router startup current. You might also try rerouting the power cord...

Is the RC snubber type determined by ac voltage? Thanks

The machine uses just one power AC line for both motors. Thats why I was thinking of just cutting that wire. It's already external to the machine. the just use a maintained start switch to restore power to the machine when it's pushed. The switch itself would mount to where the black plate is on the bottom left of the machine...

If your trying to send step/direction signals through the USB, it won't work. What are you connecting it to?

Thank you all for answering. This is salvaged transformer with multiple outputs so I just took 18V instead 24V...It has 12,18,24 and 32V outputs. Now I got 20,4V dc after the rectifier. "DC voltage of this "simple" unregulated voltage is 1.4 times the ac voltage. " I learned something new today My driver board can only take 24V so this will be OK. I tried to connect it to 25V and one of the capacitors on the...