RetroFit 2:1 belt drive reduction for Z Axis

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For those with larger build plates or back driving problems on the Z Axis I made this RetroFit motor plate to add a 2:1 belt drive reduction to the Z Axis. There are some other solutions but this uses the existing Z Axis Motor body and bolts on in place of the Nema 17.

I'm using 60mm length Nema 17's and SFU 1204 ball screws with a 35 lb build plate and I no longer have back drive problems.

https://www.thingiverse.com/thing:5982011

Z reducer Assy.png

Z reducer.png