Backlash Reducer for Overlord / Overlord Pro

thingiverse

UPDATED ALTERNATIVE VERSION AVAILABLE HERE: http://www.thingiverse.com/thing:1421326 This backlash reducer let you mount a spring or rubber band easily to the arm joints to reduce the backlash of the Dreammaker Overlord / Overlord Pro effector. Print 12 of these (1 to start with to get your settings right), get some springs of appropriate size/force or rubber bands, and mount them over the joints. Use at least 50% infill and shell thickness of at least 1,2 mm for a good result. Print it with support and with the flat surface down against the bed. [Mounting Instructions] Place the spring/rubber band on one backlash reducer and attach/slide the part over the joint. Then put the spring on the other backlash reducer and pull it away to tense the spring and slide the over the other joint, this will be the easiest way to mount the part. IMPORTANT [1]: Remote the dust filter of the fan cooling the hot end before mounting these backlash reducers! (Fan pulls air from the hotend so the filter is of no use anyway.) IMPORTANT [2]: The Overlord 3D printer is currently not printing files to 100% 3D size. A firmware update from dreammaker is needed to correct this, but in the meanwhile this also means that you need to do a test print of the part, and if it does not fit correctly, either scale it up or down in your slicer until you get a good fit. Edit 2015-06-22: Decreased clearance for a more snug fit. Remember to push the backlash reducer onto the joints! Edit 2015-11-20: Now after 5 months I one of the items snapped of, I do believe PLA turns brittle over time so if this happens to you, be sure to print it in ABS or PETG, that should help if you experience this issue; Or just print one or two in PLA again and replace, its most environmentally friendly after all. [DONATIONS] If you find that the item improve your daily life, consider supporting the designer by sending a tip. Click "TIP DESIGNER" here.