Z axis motor mounting
When building my MK4 I could not center the Z axis motor screw rods properly AND completely tighten down all 4 screws on the motor mounting brackets. So, I ended up with 2 screws on each motor mount pretty tight, and the other 2 not completely tight. No matter what I did, if I tightened all 4 screws all the way down, the screw rod would not be properly centered. I have been printing for a week now and I do not see any ill effect of the screws not being tightened the same. I am afraid that if I tighten the other screws now, the screw rods will be misaligned, and it will do more harm than good. I am hoping that someone really in the know at Prusa Research will comment on this, as well as anyone else who has had the same issue. Many thanks.
RE: Z axis motor mounting
the Prusa Support team rarely look here, this is more of a peer to peer group,
try asking on Prusa Chat
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: Z axis motor mounting
Thank youJoan, I was not aware of Prusa Chat.
RE: Z axis motor mounting
Prusa Chat is available on most prusa web pages, at the bottom right hand corner of the screen
Note, it appears a couple of seconds after the page materialises
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: Z axis motor mounting
The screws in the motor mounts do not need to be tightened all the way. However, none of the screws should be completely loose, the tightening force should be "reasonable", and precisely because of the possibility of centering the Z-axis movement screw, a flexible rubber insert is inserted between the mortor and the holder. The force acting on the movement pipe is downwards and the motor actually "hangs" on the screws.
RE: Z axis motor mounting
That is what I thought during the build. Thank you, Miroslav.
RE: Z axis motor mounting
Thank you, Joan. I, for some reason, I did not know you were referring to that. I have used Prusa Chat regarding the issue. I just wish I knew their actual relationship with Prusa Research, although they are friendly and forthcoming with seemingly knowledgeable suggestions. The person I chatted with suggested I loosen the screws, then center the Nextruder halfway up the Z axis and retighten the screws. That idea makes me a bit nervous, considering how sensitive the screw rods are to the smallest change in screw tightness. I agree with Miroslav and I think I will just leave well enough alone unless I have reason to do otherwise.