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Sunday, October 13, 2013

CNC mill conversion - Part 3

Y axis stepper motor mount
I have been glassing a lot lately, and the opportunity to work on my “back burner” project once again felt like a breath of fresh air. So, I decided to put away the fiberglass for the day in favor of machining aluminum.

Today I made another electric stepper motor mount. The motor will drive the Y axis of the mill once the CNC conversion is completed. The process looked a lot like making the X axis mount, so I’ll let the pictures do the talking.

Stepper mount plan with XY coordinates (in pencil)

Squaring the Y plate

Surfacing the Y plate

Y plate squared, surfaced, and brought down to size.

Using an edge finder to locate the origin (X=0, Y=0) of our coordinates system

Using the X and Y readouts to locate and center-drill features on the plate 

Drilling all the holes out to 1/4" (6.35 mm)

Counterboring the plate-to-mill mounting holes to 3/8" (9.52 mm)

Enlarging the center hole to 3/4" (19.05 mm)

Countersinking the plate-to-standoffs holes on the back side of the Y plate

Front of Y plate finished

Back of Y plate completed

Y motor mount (left) next to the X motor mount

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