I have tried to make the chassis constrained the same way as it is in the original mendel, however I am relying on gravity to hold the chassis down so I only need 6 bearings in total for the chassis. Below is a picture of the chassis mounted to the OverlapStrap frame.
The main reason my plans for this repstrap deviate from the work being done by bodgeit was because he uses 606 bearings. I wanted to use the M4 bearings that are part of the Mendel Bill of materials. Instead I have made these skates inspired by those used in the build your cnc project.
A couple more drawings for the Z-Rail Mounts.
The upper mount
The lower mount
All Files can be downloaded here
So far all I have done is built the frame with Y and Z axes. All bars are the same lengths as in the original mendel. The wooden parts are made from 12mm x 32mm planed smooth timber.
I will be providing all files in dxf format. You can download the above drawing here
Inspired by Bodge-its Mendel Repstrap, I am building a repstrap which overlaps as much as possible with Mendels Bill of Materials. The idea being that I can print the needed 3d parts, with the repstrap, then dismantle the repstrap and build Mendel, without having to have bought lots of extra parts and materials.