Mark Wrathall wrote:

Paul Wrote> >

Yes on the knee mills. I  don't know whether they handle the ball

screws

but McMaster Carr sells them at reasonable prices.

Mark wrote:
The cheap ballscrews in the Mcmaster-Carr catalog are rolled, and thus

not

of machine quality (I think the error spec is 0.003" per inch. For a

machine

you really need precision (ground ball screws). Price is bad.

Mark.

Well then it is cheaper to buy a used Kasuga or Shizouka. Harrison found
a used Kasuga in Tucson AZ for $3000 that was built later than  mine and

was

in better physical shape with Fadal tool changer. He had to do some

electronic

work to get it running however.

Paul Lamar

Yep. If you have a space, a good industrial CNC with a blown controller is
the cheapest way.
Mark

I checked the catalog Mark. Not quite that bad +/- .003" per foot... not per inch.
Lots of stuff we do is less than a foot square and does not require a lot of
precision. For casting pattern work it is fine.

However the Bridgeport mill ball screw upgrade kit is $750 making a used Kasuga look 
all that much more of a bargain.

Paul Lamar
 
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