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Converting a Grizzly G8689 Mini Mill to 3-axis CNC, Part 10:



And for today's magic trick, I made another one!



And so the stepper motor will mount about like yea.



After noodling several possible options, I wound up just ordering come commerical premade extruded stepper mounts.



So, diving right back in, the first thing I wanted to do is shorten up the whole assembly as much as I could, and one place
I could shave a bit was in the output shaft of the stepper, which had about .300" of extraness that could go away.



As it was going to be difficult to chuck it up in the lathe, I defaulted back to that universal machine tool, a Dremel with a cut-off wheel.



After that quick lop and a bit of filing to smooth things up a little, I was able to slip things together
and get a measurement of how much to mill down the stepper mount.



A few passes with a nice sharp face mill and she's ready to go. Sorta.



"Sorta" meaning "not really", at this point.
As it sits, two of the mounting screws are just hanging out in midair, which kind of weakens things a bit.



I'd been thinking about this for a while, and had a couple ideas. One was to screw a block or bracket to the top of the
existing bearing block, another was to drill and counterbore the two bosses inside the extrusion at 3:00 and 9:00 for
some longer screws, and a third was to counterbore for some screws in one of the 'points' of the corner voids.



Wasn't real thrilled with any of those- and number two wouldn't work anyway, as the screws would land right on top of the two
bolts that hold the bearing block in place. So I went with Plan D, and scrounged a chunk of 1/4" plate from my junk bins.






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