monoprice select / wanhao i3 fixed bed calibration by toyotaboy02

Last crawled date: 3 years ago

I really don't like the springs that this printer comes with, doesn't seem stable and my machine was always going out of calibration. There are caps on thingiverse that are supposed to make them more stable but they still lean. So what I did was got some 4-40 screws (I know this comes with metric but american thread is easier to acquire in the states), and mounted them the same way as the existing ones (screw down, nut underneath). Now press some 4-40 nuts into this knockoff (which are larger than the original metal ones with nice chunky knurl), thread that on (making sure the nut is facing up), then thread one more nut under the bottom metal bed. Start the bed low, zero the machine out.. then slowly creep the bottom nut up, re-tightening the knockoff down. Not close enough? loosen the knockoff, give the bottom nut a turn, re-tighten. Ideally if you printed 8 of these, it might make it easier to turn the bottom nut.
*update: made this 5mm smaller (down from 30mm). If you tried to use the old version on the bottom too, it'll hit the frame.