Hi all Yesterday evening, I mounted the PCB and when I look at it from the side, it looks like it's not completely flat. After tightening the screws (not too much!), it looks like its a little bit bended. Unfortunately I have no image at the moment. but it looked a bit like this: Is this normal? Since it is the building base for every print, I'm a bit unsure whether this is okay or not. Thanks for any suggestions.
Mine is also not completely flat, but my borosilicate glass plate is. And that's where you are printing on. Problem solved
It should be flat to maintain thermal contact between the heater and the glass. As I do not have my BB yet this is just an observation.
Oh, then I made myself not clear. The rod clamps you use to mount the bed onto the borosilicate plate are quite powerful, and will flatten the heated bed onto the glass plate.
A slight air gap isn't the end of the world but you could take out the PCB and GENTLY try and bend it so its more convex. Once you put the glass on it should have a better contact
Thanks for your replies. When I mounted the glass on the PCB, it looked like it makes quite okay contact. I'll see on the first prints, if there is more room to improve.