Stepper Motor Spacer MDF

WORK IN PROGRESS

I wanted to use the improved pulleys, (designed by nophead), that came with my parts kit. Unfortunately, the setscrew base moves the gear part of the pulley up above where the timing belting path normally is. I need to space the stepper motor away from the, (in this case) x-180-z-bearing-plate_2off part.

If I had a 3D printer, I guess I could print something. Until then, here's how to make spacers out of MDF.

Measure your motor. I took two screws and put them in diagonal mounting holes in my motor. Then, using a inexpensive digital caliper, I measured the total distance. I then measured the thickness of the screw. The bolt hole radius is the overall length minus screw thickness divided by 2.

Measure the "spacer envelope"

Using a ruler, pencil, and a compass, layout the spacer dimensions on a scrap piece of MDF. If you are making several at one time, make allowance between the pieces for the thickness of saw curfs.

Draw an X across corners of each spacer. Using the compass, trace a circle using the above calculated radius.

Drill out the holes using a larger than normal drill bit. Here, I've used some drywall screws to secure the MDF to a piece of scrap wood. I drilled the bolt hole out to .250 inch, and the center pulley hole to .750 inch. I first pre-drilled the holes with a 1/16th inch bit.