Re: Ballscrew Nut-blocks, Power Supplies

Roger,

I used the McMaster Carr ball screws on my Shoptask 3 in 1 machine on the X
and Y axis. If you go to http://www.ktmarketing.com/ballscrew.html you will
see my experience in working with the screw stock and it may give you some
ideas. There is a link on the bottom of the page that takes you to a page of
pictures of my X axis and a close up of the ends and the ballnut and
adapter. I am not using 2 nuts per axis, so I have about .005 backlash, but
EMC seems to compensate for it quite well.

Here is an idea for a low cost end bearing
Thrust Bearing Thrust Bearing
|o| |////| |o|
\\\\\\\\\\\\\\\\\\\\\\\\|-------------------------------------
\\\\\\\\\\\\\\\\\\\\\\\|-------------------------------------
|o| |////| |o|
Attachment to machine
Then thread the end to allow you to adjust the preload on the thrust
bearings. Needle thrust bearings are about US$3.50 for the set of cage and
thrust washers from MSC.

Tim
[Denver, CO]

----- Original Message -----
From: Roger Brower <rbrower@...>
> I'm going to use the ...McMaster-Carr standard accuracy class (.004/ft)
> $1.00/inch ball screws, ballnuts for $18 each. .631 dia. x .200 pitch
> "value-priced" series. Everyone building Gantry routers probably will.
> Since we all ....need to make an adjustable block to mount two ballnuts
> per screw for no backlash.... and I bought the 15/16-16 Tap needed...
> Would anyone like to borrow the tap and make me two blocks while you are
> at it? I'm more of a woodworker than a machinist, and this piece is one
> of the stumbling blocks (also need cheap end block bearing arrangement,
> 2 pc)
---SNIP----