fixing a twisted frame that doesn't budge - Vcore 3.1 300
https://www.youtube.com/watch?v=h7ZTq2dDTkM
Hi! first of all, I've watched this famous video about the topic: I'm trying to fix a slightly twisted frame on my printer, and considering what's in the video and my current mesh I tried doing the following:
1- tapping on A to push it down
2- trying to push B up
the point is, if I screw the four screws mentioned in the video (and the RR commissioning guide) for each side they don't budge a bit, I even tried lightly tapping on A with a rubber hammer but the results are almost none (even hitting the extrusion with a force I wouldn't be comfortable applying more than a couple times honestly lol)
Any help is appreciated, how have you handled this problem practically?
3D Printers & a Whiteboard
YouTube
RatRig V-Core 3: How to Get a Square Frame
This video is for those who struggle getting bed meshed with their RatRig V-Core 3.
Please feel free to jump to the chapter you are interested in.
0:00 Intro
1:05 about the v-core 3 frame and bed leveling
8:26 what to take care of in the building phase
9:17 the right square
10:09 build tips
16:50 adjusting the frame according to your bed mesh
...
5 Replies
If you can't get the frame to move, you could try shimming one of your rails to get the same effect...
Similarly, sometimes just playing with the torque on the rail bolts can help...
That said, you are looking for less than 0.5mm of movement in the frame... You might just need to be a little more persuasive... If you don't want to strike the machine directly, consider using some means of leverage to aid in applying torque where you need it...
by shimming you literally mean sanding it down with a machine? ahah
I really need to dive deeper and find some other way, I even tried putting a thick rag between the extrusion and the hammer to avoid damage but the results were really minimal
might be a dumb question but, don't I risk to bend the extrusion or cause some kind of permanent damage to it?
No, not sanding... The opposite... Using metal shims to make the Y rails more co-planar with each other
Instead of lowering A, you can lower the rail in that same spot by putting a shim between the rail and the frame... I've never done it though so not sure how much mileage you'll get going that route... In theory I think it should work..
I mean it makes sense on paper, though I have to get my hands on some 0.1/0.2mm shims first ahah
And anyway, since I would have to put it/them inside one of the screws that hold the rail to the frame, I’d have to disassemble part of the X carriage in the process(?)
I don't think you'd need to disconnect x... At least when I look at my 3.1, I could shim the y rails without disconnect anything.. Just loosen the rail bolts, insert shims, retighten