Extruder keeps slipping
Extruder keeps slipping
My M2 has been working pretty well since I got it in December but now the extruder drive keeps slipping. At first I thought its just the off brand gray filament I bought off Amazon but I just got some more genuine natural MakerGear filament and it does the exact same thing. At random times during the print it starts slipping. It makes a buzzy noise and the drive gear can be seen to skip backwards. See the video..
http://youtu.be/DvYbqPxg1XU
Some time later the extruder stops feeding, the gear wheel continues to turn and the smooth bearing wheel stops. At that point there is a"bite" taken out of the filament and it never recovers. What is going on?
The video shows it slipping on the first layer but it also does it much later into some prints as well, so I don't see how it can be anything to do with the initial z setting. Also, the original black filament that came with the machine always seems to work just fine.
http://youtu.be/DvYbqPxg1XU
Some time later the extruder stops feeding, the gear wheel continues to turn and the smooth bearing wheel stops. At that point there is a"bite" taken out of the filament and it never recovers. What is going on?
The video shows it slipping on the first layer but it also does it much later into some prints as well, so I don't see how it can be anything to do with the initial z setting. Also, the original black filament that came with the machine always seems to work just fine.
- JohnnyRobot
- Posts: 128
- Joined: Tue Apr 22, 2014 9:25 pm
Re: Extruder keeps slipping
When that happens to me (usually after changing filament) it's because my filament drive screw is too loose.
It can behave similarly when it's too tight also.
Try adjusting the screw while extruding material. You want the screw to bite into the filament quite a bit. If you're not tight enough, the gear won't be able to apply the force needed to feed the hot end. Resulting in it cutting a groove into the filament.
It can behave similarly when it's too tight also.
Try adjusting the screw while extruding material. You want the screw to bite into the filament quite a bit. If you're not tight enough, the gear won't be able to apply the force needed to feed the hot end. Resulting in it cutting a groove into the filament.
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Re: Extruder keeps slipping
As well as playing with the tensioning screw, retract the filament entirely out of the hot end, unscrew the fans, and pull the extruder off the drive gear. Then gently wiggle the drive gear with your fingers. If there is any play at all, the set screw needs to be tightened, and preferably set with thread locker. Take the opportunity to clear the gear of any filament particles as well.
Re: Extruder keeps slipping
You mean the drive head clamp screw? I've tried adjusting that to no effect.JohnnyRobot wrote:When that happens to me (usually after changing filament) it's because my filament drive screw is too loose.
Re: Extruder keeps slipping
There is a small amount of play, but the play is in the bearing not the gear onto the shaft - that's completely tightjsc wrote:As well as playing with the tensioning screw, retract the filament entirely out of the hot end, unscrew the fans, and pull the extruder off the drive gear. Then gently wiggle the drive gear with your fingers. If there is any play at all, the set screw needs to be tightened, and preferably set with thread locker. Take the opportunity to clear the gear of any filament particles as well.
Re: Extruder keeps slipping
What temperatures are you running at?
Re: Extruder keeps slipping
220 or 230jsc wrote:What temperatures are you running at?
Re: Extruder keeps slipping
abs or pla?
- JohnnyRobot
- Posts: 128
- Joined: Tue Apr 22, 2014 9:25 pm
Re: Extruder keeps slipping
This one. Anyone know what the actual technical name for it is? Also, make sure you're not missing the nut on the other side.
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Re: Extruder keeps slipping
PLArpollack wrote:abs or pla?