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With the cross slide ballscrew mounted and the stepper wired, it was time to mount it to the slide.
There's several ways to do it, and after a bit of pondering, I decided on a setup that, while a bit crude,
would be fairly easy, functional and strong. I started with a pair of double-row angular-contact bearings.
I whipped up two quick plates out of 4" x 1/2" aluminum flat stock, then located,
drilled and bored a mounting hole through both of them.
The bearings were finger-press fits, with just a 0.0005" clearance, with the tops
of the plates just level with the top of the slide.
After determining where would be the best place, I drilled three slightly-oversize mounting holes
through the two plates, for 3/8" bolts.
I then made a thin 10-ga aluminum "thrust plate" to go between the two main plates.
I could have bored a stepped hole in one plate, or even bored a stepped hole in a single, thick plate,
but this was all kind of designed on the fly- and I fully expect this to be in effect a prototype,
and will likely be extensively changed later.
With the three plates on place, I was able to carefully locate the holes for the mounting screws.
Then, carefully drilled and tapped in the slide.
And (sort of) mounted, with temporary screws.
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