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Calibration Screw loosening during long prints
Posted: Wed Jul 12, 2017 2:45 pm
by morganfree
Hello!
I'm having a problem for the last 2-3 weeks.
It seems that one of the Calibration Screw (I have the table with 3 screws) is lossening after a few hours of continued printing.
In my case, the only one doing that is the right adjustment screw, according to the image below.
Once, it even lossed completely, falling to the ground... When I reached the printed, the table (so the print, too) was completely unaligned.
I've checked if all the components were in place (spring, plastic ring and screw) and everything is fine... the three adjustment screws are the same way...
Any idea about why this is happening and a possible solution?
Than you very much in advance!
Best regards!
Re: Calibration Screw loosening during long prints
Posted: Wed Jul 12, 2017 3:51 pm
by sthone
Vibrations can make any screw back out.... applying some Loc-tite (Blue/medium) to the screws should fix that.
-Steve
Re: Calibration Screw loosening during long prints
Posted: Wed Jul 12, 2017 3:57 pm
by morganfree
Great Steve! I was thinking in that, but I dind't know if going ahead or not!
I'll try with that.
Thanks a lot!
Edgar
Re: Calibration Screw loosening during long prints
Posted: Wed Jul 12, 2017 4:03 pm
by wmgeorge
If the spring is applying tension to the screw it should not loosen. I do not have that sort of bed on mine, speaking from experience on other machines.
Re: Calibration Screw loosening during long prints
Posted: Wed Jul 12, 2017 5:34 pm
by Spotopolis
If you haven't already, try tightening all three screws snuggly, then back them off to adjust. If they are already loose the springs will not hold them under tension, allowing them to vibrate out.
Re: Calibration Screw loosening during long prints
Posted: Wed Jul 12, 2017 6:20 pm
by insta
It's much more fiddly work, but you can take a page from the Rev. E spider, and drill/tap some grubscrews to pinch the leveling screws once set properly.
Re: Calibration Screw loosening during long prints
Posted: Wed Jul 12, 2017 10:45 pm
by morganfree
wmgeorge wrote:If the spring is applying tension to the screw it should not loosen. I do not have that sort of bed on mine, speaking from experience on other machines.
Spotopolis wrote:If you haven't already, try tightening all three screws snuggly, then back them off to adjust. If they are already loose the springs will not hold them under tension, allowing them to vibrate out.
I guess the tension of the screw is not enough because of the bed leveling i can reach... that screw should be loose from the beginning causing the spring not to tension too much! But it's the best leveling I can get, so I can't change that
Insta! I'll check what you say. That seems to be a more correct option! Thanks a lot for your answers!