big problems with print bed and mesh
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@gloomyandy
The bed is 340x340.
The 4-point mesh is just to see if anything changes in general.
How many measuring points are useful... as many as possible or are there rough guidelines? -
@dogma2k It's really hard to say and it pretty much comes down to how smooth/level your bed is. So if you have a really flat bed then you can use a sparse mesh, but if your bed has dips all over it then you may need a much more detailed one. The good news is that you typically don't need to generate the mesh very often as you can just load one that you have already created.
My question about your bed was more about what the surface is like, so for instance do you have a removable bed (magnetic) bed plate or anything like that?
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@engikeneer
I can hardly imagine that the gantry sags in the middle. They are each on a 3030 profile. I've already thought about 4 points, but I don't think that's going to help much here
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@gloomyandy
It is a detachable plate underneath which, as usual, a magnetic sheet is glued to the finely milled aluminum plate.
Could it help to press down slightly on the back of the Y rails? -
@gloomyandy
My bed really seems to have a crease. I have now set ABL so that it compensates for curvature (not completely is logical but much better)
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How it looks is secondary. The important metric is whether it passes a first layer print test.
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@phaedrux
Thanks for the 1st layer test, it worked wonderfully.
