/diy/ - Do It Yourself

>>1742397
>>1742443

we buy/make slides like this bullshit at work, out of delrin and uhmw, they suck in both applications. extrusions are not very smooth, flat or parallel . over 1meter you are gonna have a bad time. you can get it moving smoothly at one section, then bind at another. they also have loose specs so if you set it up to be nioce in one orientation, if you rotate the extrusion, it will be loose/tight (eg 19.94mm x 20.10mm profile)
https://reprap.org/wiki/Mondrian_Build_Manual
https://reprap.org/wiki/Mondrian

this french guy has a lot of good insight on doing the shitty print bearings, hes been working on it for a few years now, and seems to have figured it out enough. go though his history and check all his revisions and notes, he has a lot of detailed stuff on the printed bearings
for over a year i was following his build making my own until it became clear it wouldnt work without big changes, and the only way he go it to work was putting the drives right on the bearings so they wouldnt bind.
linear rails 1000mm long are only $50 for an mgm12 chinese deal. with the plastic shit on extrusions, you are going to have tons of play and still be binding, im not too good with computers but all this friction shit is real, you will get binding out the ass >>1742200
with this setup. printing orientation makes a big difference with the sliding surfaces. the z banding you get with 2d prints makes the bearings slide so much smoother. not having 2 adjustable pads is gonna kill you. once you rotate your beaing on the extrusion, it will fuck up all your preloads because extrusions arent square