Promega Bottom Z Belt Clamp

thingiverse

This design is to help users pull and hold the belt tension on the M3D Promega printer. After 20 or so prototype designs of various styles I decided to keep it simple and this design has been working the best. Hope this helps, any questions please ask. Cutting the end of your belt at a slight angle will help you push it through the part. Depending on the printer used to print the part, you might need to use some thread to help pull the belt. ****Readme for Promega Bottom Z Brackets V.822018**** BOM Parts needed - 4 per bracket https://www.amazon.com/gp/product/B077CJV3Z9 M3 screws x 12mm length - 2 per bracket for the top caps https://www.amazon.com/gp/product/B01AXUSLYS M3 screws x 8mm - 2 per bracket for the bottoms https://www.amazon.com/gp/product/B07C6DKT3H ********** PRINT 4 each of - Belt Tension Cap Z Bracket GT2 Tooth Profile (print this model rotated at 45*, seems to help the toothed profile print cleaner) Print 1 of - Z Bracket GT2 Body Optical Probe Side (this has a wire pathway underneath) This is optional, otherwise, you can print 4 of the main model. Print 3 of - Z Bracket GT2 Body (or print 4 if not using above)Secure your bed around the Z20 area by placing a binder clip on the centermost belt under the bed (attached to the stepper motor). One Z extrusion at a time take the three screws out - located on the outside frame. Remove the screw on the bottom of the frame. This will allow you to slide the extrusion upwards enough to remove the old piece and to install the new piece. Further instructions for this can be found on the Promega Launchpad. You might find it easier to slide the belt into place before you slide it the bracket on the extrusion. Reinstall the extrusion screws. Install 2 M3x8mm screws into the Z brackets from the bottom of the frame. Place the toothed section of the slide in place with the number 1 facing out. Pull tension on the belt when you are ready. With one finger holding the belt down, place the top cap into place. Insert it at a 45* angle and rotate it down. Screw into place with 2 M3x12mm screws. Repeat process for all sides. If you bed level is off by 0.5mm you can flip the toothed belt piece around. Make sure you mark the belt before you do this so you can pull back to the same tension. ********** ***** Heat Insert Install guides https://www.lulzbot.com/learn/tutorials/heat-set-inserts-tips-and-tricks ***** ADDED: Optical Limit Switch Z Slider with Fin, and End Stop Holder TODO - Design bracket that uses the ShadowHawk Optical Z Stop Switch