Back of bed being ignored?

[MorningsideSanitarium]

I've been battling a problem with my print space. In Cura 4.0, the print fits fine (a 310mm circle). As well it should, it's 10mm under the full size right? Well it does fine all around except the back of the plate. At least a half inch is being ignored. The circle will "flatten" when it gets to that point like it's being limited. Anyone know what causes this? I'm using the cura profile someone posted here recently for 4.0 also.

And I'm now noticing, the right side of the bed is doing it too, although not quite as badly.

[William]

Hi, Can you provide some pictures?

[MorningsideSanitarium]

Thanx, but more investigation has revealed it to be the end stops. I've printed new adjustable ones, and got past these "walls." But now I'm battling an issue where the nozzle pushes the bed down on every home command, sometimes not even coming back up, resulting in dragging the plate if I start a print. Any ideas there?

[William]

Hi, you can 1.Check the height of the extrusion head and the print platform, and re-level
2. Check the tightness of the belt of each shaft and whether the pulley and bearing are issued, which can be lubricated with lubricating oil;
3. Check the driver board voltage (0.8-1.2V)
I hope this can help you.