c-bot slider for eccentric cam ( 4-wheel )

thingiverse

I really like the cbot frame parts however I don't like the bevel / squeeze approach for tightening the wheels up. The eccentric spacer setup is far more reliable. I designed this in Fusion360 based on [Fusion360 D-Bot Core-XY 3D Printer](https://www.thingiverse.com/thing:2430436) design for the same part. Dimensions should be the same with the exception of the wheel spacing which is only to account for the eccentric spacer. Note I pretty much followed the same steps in the design as the source material though I did change a few things ( mostly fillets instead of camfers ). I'm also a fan of the heat-set inserts as I have used on some of my [other](https://www.thingiverse.com/thing:2762077) designs. Parts you will need do not really change much. Still need the same M5 bolts, washers etc but add 4 x [6mm eccentric spacers](http://openbuildspartstore.com/eccentric-spacer/) and 4 [M3 heat-set inserts](https://www.mcmaster.com/#94180a331/=1b6shc7). Print in whatever material you want as these do not get direct heat pla would be fine. I'm a fan of petg for this sort of thing. ~~I have done a fit test on the extrusions, verified the travel on the eccentrics etc but I have not yet switched to them on my bot. If you have any questions / comments please let me know~~ I switched to these on my main c-bot recently. The eccentrics may be a little too close to the extrusion - the exterior of the eccentric nudges against in one spot but at the right tension there is no problem so not sure if its worth fixing. If you experience this issue let me know and/or tweak in fusion360 design. If you edit, Sketch 4 (step 8) for the linear rail side and Sketch 25 ( 5'th from the last ) are the places to tweak the eccentric spacing.