mk3s bed is not flat  

Re: mk3s bed is not flat

Welcome to the "My bed is not flat" crowd. Search the forums, there is plenty of discussion available on ways to improve first layer calibration.

Also, be aware that large parts can warp, and will distort as the part prints, making the bottom look "not flat" - even when the bed is okay.

Re: mk3s bed is not flat

IMG_1325.jpg

Hi

I have just purchased a MK3s kit which i have assembled and is working well.

My issue is that the bed seems to be slightly distorted. I have attached a photograph of the underside of a large part i have just printed. Im not sure if it is clear from the photo, but at the corners the filament has squashed flat and in the centre it is still separate filaments, indicating to me, that the bed is lower in the centre.

Is this normal?

I have tried the bed calibration routine a number of times and apart from lowering the Z height further i cant think of a solution.

Im finding that on smaller parts, I have to print a raft for the part to sit on. This works, but I think that it should be unnecessary?

Any thoughts or advice please?

Thanks

That bed looks much different than any I have seen before. What are we looking at?

Re: mk3s bed is not flat

Make sure there is a distance in the middle of the heat bed.
If you have missed it then you can get this problem.

Re: mk3s bed is not flat

looks like some kind of clone build flex steel sheet as it has no markings that are found on the 2 different kinds of Original Prusa mk3 and
mk3s printers

Re: mk3s bed is not flat

I assumed the photo is the bottom side of a part that the OP had printed.

Re: mk3s bed is not flat

I assumed the photo is the bottom side of a part that the OP had printed.

you are right I missed that