Any ideas on what to fix?
Any guidance would be appreciated. It’s tricky to understand what the areas of the height map are on my printer.
14 Replies
fair-rose•13mo ago
Assuming you're looking at your printer head-on, the coordinates in your heightmap correspond to these corners:
fair-rose•13mo ago
As far as how to fix the mesh goes, your frame has a bit of skew in it-- meaning that your left and right gantry extrusions are not parallel with each other. In other words, the corners of your gantry aren't all at the same height.
Watch this video-- it might not seem like it has much to do with your issue at first, but it directly addresses what you need to do starting at around 16:50.
https://www.youtube.com/watch?v=h7ZTq2dDTkM
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
...
wise-white•13mo ago
thank you @jklmd
just to confirm @jklmd , the back left corner sits at about -.5mm and the back right corner sits at +.5mm? And the front right corner sits at around +.5mm?
Oh nvm, i see your diagram just maps to what's what on the heightmap. Cheers
fair-rose•13mo ago
The back-left corner of your gantry is ~0.5mm too high (too high = more space between the gantry and the bed = klipper thinks the bed is low) and vice versa on the back-right corner.
Kinda the opposite of what your intuition might first lead you to believe, but once you frame your mind around the measurements being relative, it starts to make sense. In essence, the mesh telling you that your bed is 0.5mm too low in the back-left is the same thing as saying that that gantry corner is 0.5mm too high. If that makes sense.
I mean technically your gantry could be perfectly square and your bed could just happen to be off by half a millimeter in opposite directions in the back corners, but that'd be a one-in-a-billion chance. I'll stick with Occam's Razor on this one 🤣 So yeah, right now the mesh is telling you more about your frame than your bed (even though it's using your bed to present the data)
wise-white•13mo ago
thank you @jklmd for the detailed explanation, that makes a lot of sense. Now I'm off to trying to level things out 🙂
wise-white•13mo ago
happy to say there have been big improvements recently @jklmd
wise-white•13mo ago
i am so relieved, i thought i was a goner
fair-rose•13mo ago
Awesome! A quarter of a mm over a 500mm bed is a fantastic result. Happy printing!
wise-white•13mo ago
worried about tinkering with it more from here :S
wise-white•13mo ago
trying to get it <.20 but i might just leave it
fair-rose•13mo ago
Yeah no 100% stop messing with it LOL
wise-white•13mo ago
thak you haha
im like 50 tries in haha
fair-rose•13mo ago
anything under 0.3 is considered incredibly good for a 500
wise-white•13mo ago
great to hear 🙂