You can use some nail polish in place of loctite.
The grub screw should make contact with the flat part of the motor axle. Can you disassemble and see if this is the case? We've seen machine that seems to have been assembled the wrong way and thus the grub screw would need to be loosened again and again...proper solution would be to mount it towrds the flattened part.
Some wrong grammar in there from writing tired from a mobile phone but I hope you get my message...
Yes, it screws into / against the flat side of the shaft.
I may try replacing it with another grub screw -- maybe there's something wrong with that particular screw? I don't recall if it's a conical / pointed tip screw -- a cup or flat tip would be less likely to unscrew under load here.
That and some (blue) Loctite.
And a new feeder.
You should definitely register a support case with Ultimaker on this one. Let us know what response you get. Where are you located?
California.
See my PM (top right corner).
selmo, did you try with loctite yet and did it solve your problem?
I replaced the grub screw with a new one, and it's still working it's way loose, but it's holding longer than the original one -- it should last me until parts arrive for my next step(s).
Selmo, I had the same issue after my first few prints, the entire gear fell off! I used blue Loctite on the screw and have not had an issue since.
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gr5 2,224
You can set steps/mm using gcodes and save it permanently also. Post again if you ever need to but the quick answer is to install repetier host, command say 100mm of travel and see what actual distance is (with filament only half way down the tube or command it to unextrude. Then find the ratio of error and correct steps/mm by that amount. RH will tell you the current steps/mm when it connects to the printer through usb and you can adjust this and save it (I think M500 might be the save command).
As far as loctite - I hope someone else answers. I know there are several types (colors) - some are meant for permanent and some will be "breakable".
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