Chronicling my Long EZ construction (and a few other things).
Disclaimer
This blog is for entertainment purposes only, and is not meant to teach you how to build anything. The author is not responsible for any accident, injury, or loss that occurs as a result of reading this blog. Read this blog at your own risk.
Sunday, October 27, 2013
CNC mill conversion - Part 5
Ball-nut stop-blocks
Last time, I put all the pieces I machined together to show how they fit, however there was still one last internal component missing, the ball-nut with its stop-block.
The stop-block is threaded onto the ball-nut, but also attaches to the XY table, thus transferring the electric motor impulse into actual linear movement of the table.
I needed to make two of them, one for the X axis, and one for the Y axis, and they were slightly different from each other.
As usual I started with a piece of scrap aluminum, but this one was pretty mangled up, so I was happy to be able to recycle it into useful service.
Truly a piece of scrap metal
First order of business was squaring the roughly cut block of aluminum...
Facing one side
Aluminum blank
... and creating the step.
One "step" closer
Then I went to work on the main hole. This needed to get drilled, bored, and tapped.
Beginning of the center hole
Enlarging the hole
The Mother of all taps!
Talking about taps, I bought this huge one on eBay, just to thread the two stop-block holes.
"TapZilla!"
The last step was to drill and tap the small hole on the fat end of the block. Easy!
Small hole drilled...
... and tapped.
The last piece of the Y axis was finally done.
First stop-block done!
Stop-block in position
Time to start on the last stop-block...
Part "donor"
Using the band saw to cut the piece down to size
More facing
Taking a 0.150" (3.8 mm) roughing cut with a ¾" end mill
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