Re: [CAD_CAM_EDM_DRO] linear servos

carlcnc@... wrote:

> I am looking at some big linear servos,price is right but can't
> find documentation of how much force or "thrust" they are capable of.

Can't help with real numbers, but just read an article in Modern Machine
Shop about linear motor EDM's. Key advantages are very high
accelerations which helps to self flush the pockets. However it mentions
in discussing the advantages over ball screws, that lack of torque at
low speeds is a disadvantage that really isn't a disadvantage for EDM
since required torque loads are very small.
Of the machines I've read about experimenting with linear motors, it
seems it's being used for very high speed machining, 20k+ rpm spindles
contouring at speeds up to 1200 ipm and taking light cuts.
If you get these, would hope you keep folks up to date on your progress.
The instant I first saw linear motors, I wanted to build a blindingly
fast bench top machine. Maybe when linear motors are availble on eBay
for about what used servo motors go for....

Jon