Hi all

I'm trying to decide on motors for my new project. Building a new cnc mill - router, reasonably heavy duty but small travel (400mm). I'm building it out of linear rail / ball screw assembles from ebay, nice units so far! I already have a Gecko G540 that I use to drive the first machine I built, they say this can take upto 3.5 amps per drive. Just not sure how much grunt a 3.5 amp motor has..... Do I just build it and see if they have enough power or look at a bigger drive right from the start?

Also are the Chinese 2.2kw air cooled spindles any good or do we stay away from them?

Thanks guys.

Dave