Extruder "stuttering" when printing raft


#68

Try drawing a line on the end of the motor shafts or the end face of the gear for an easy observation of the motor travel, stuttering back and forth or skipping in a single direction, also the small bearing that presses the filament against the feed gear is under a high side point load and I have seen them destroyed and no longer turning freely causing high friction and feed skipping or clunky noise.


#69

I think you said you've cleaned the nozzle, but have you actually tried a brand new one?

And it could be a temperature thing, maybe the hot end is just not getting up to where it needs to be.

I had this exact problem (just like shown in Julia's video) with my M200.  Cleaning the nozzle didn't fix it.  Replacing the nozzle did fix it. 


#70

So far the printer is also printing again, without any exchange of parts. I cleaned the nozzle and the hotend again. But this time I cleaned the nozzle with acetone first and after drying with a torch. It seemed that there where remainings, which were not soluble with acetone, like Z-Hips.

But I will buy some spare parts anyway. 😉 Thank you all for the help.


#71

Seems this problem is raising, we have 3 customer printers down for this exact same issue.

We have replaced ALL the components

ribbon cable

PCB

Nozzle

Hotend

Hot end wires

All for new ones on each case one by one until we finished with all new components and problem still persist. Printers were working normally before the issue.

At this time we have no more solutions. And one of the motherboards we sent to zortrax is still being tested.


#72

I'm seeing this at times as well. Wondering if it's possible that new nozzles are coming in with slightly smaller orifice diameter.


#73

I'm seeing this at times as well. Wondering if it's possible that new nozzles are coming in with slightly smaller orifice diameter.

I did chuck one up in my lathe and ran a bit through it.. (0.4mm)  It did take out a very small amount of material. Have to use an eye loupe to see it though.


#74

It doesn't take much...


#75

I gotta say, again I think, that my M200 stuttered too on the left rear side/center of the bed with bad layering on the first layer and the feeder stuttered when it did that. 

It was because the left back side was off and the nozzle was so close to the print bed that the material couldn't come out so it would stutter and the raft would look like crap there but after the first layer or two it would start to print regularly.

Even thought the calibration wasn't that far off it was off so I lowered the back left side 1.5 to 2 turns and no she prints a beautiful raft with no stuttering. 


#76

Hmm, I have this problem too. The second layer is printed too low, so the extruder drives over the first layer and pushes the printbed down.


#77

I gotta say, again I think, that my M200 stuttered too on the left rear side/center of the bed with bad layering on the first layer and the feeder stuttered when it did that. 

It clicked or skipped  :P


#78

Hmm, I have this problem too. The second layer is printed too low, so the extruder drives over the first layer and pushes the printbed down.

I would check the bed level, btw I do this always after swapping perfboard or nozzles.


#79

I did, the middle is 0.3 off. I will check again when I bend the print bed back. I still have the old one so the bed rises in the middle after a couple of prints, that is really annoying.


#80

I did, the middle is 0.3 off. I will check again when I bend the print bed back. I still have the old one so the bed rises in the middle after a couple of prints, that is really annoying.

The same happens with the new one..it's not the table that it fails, it's the debris under it.


#81

Hi All,

after approx 260 hour printing time with my M200, I got extruder stuttering too. I have made short video to explain my issue. Same stuttering problem occurs when printing raft, but after raft is printed - model itself prints good and without stuttering. Any ideas why this is happening ? 

https://youtu.be/G1e39_y6O1E


#82

If it clicks like that when "air printing", it's usually a nozzle issue, assuming you are using official Zortrax filament.


#83

Yes, I use only Z-Ultrat and Z-Abs filaments. I will replace noozle and will check again (I have spare one). It is strange that this problem appeared after change of filament.  Previously it was all fantastic - no issue printing :)


#84

All is fine after replacing the noozle. Back in love with M200. Thank you Julia :)


#85

I recently had the same problem, but it seems to have something to do with the torque the extruder motor has during printing the raft.

You can try to provoke this behavior by holding the filament at the extruder infeed while the extruder feeds it in, then stuttering occurs.

For me, it seems like it’s a software problem, this has nothing to do with the nozzle. The extruder gear springs back, but only due to the low torque of the extruders stepper motor. In the current firmware version the problem seems to be solved.


#86

My ownership of the Zortrax has been disgusting. It is not a ready for prime time product
despite their advertising. In a short time after cleaning nozzle in acetone and running wire through it or placing new nozzle, the problem shortly returns. It creates more problems for me than it solves. New filament feeds with no problem until it starts trying to extrude out of the nozzle. Then the jumping or clicking of the filament feed mechanism starts. Why? Because the feed motor is undersized. Thank you Zortrax.


#87

Hi,

I am sorry to hear about your bad experience with Zortrax. Still, please note that apart from the nozzle - there are other consumable parts which can be responsible for the problem you experience. The hotend might be clogged with material residues or the heater&thermocouple is malfunctioning. Have a look at the maintenance guide and refer to suggested part replacement time. Also, you may find our troubleshooting manual informative.

Best regards,
Karolina