m201 bed

[Black Wolf]

Hello everybody!
I have assembled my Prusa M201 quite quickly... but now I have still to have some result printing... Well, could be me doing something wrong... anyway, when I setup the height of the printing bed all the corners are at the same level but when checking the height at the centre of the bed, I find that the hotend touch the bed... like it's not flat! Well... any hint about?
Many thanks for all replies!

[Admin]

you may tighten the corner too much,so the center raised. loose them a bit and re-level it.

[stado65]

The aluminum plate is not flat enough, whatever the way the screws are tightened.
I solved this by adding a glass plate which is clamped other the aluminum plate.

[Black Wolf]

Many thanks for your reply. I lowered the bolt that close the contact with the Z stopend and loosened a bit the screws of the bed... looks ok now!