Prusa upgraded to duet, weird extrusion
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@Murloc992 what about rotation by 45degrees?
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Let me try.
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Original cube on the left, the 45 degree rotated on the right:
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It's gotta be the new extruder motor. Perhaps it came bad from E3D?
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I tried the X and Y motors instead of it, all the same..
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Could it be belts? I changed mine to spring steel mesh belts(because I didn't have any others), I will buy proper (normal) gt2 belts tomorrow.
But I think with belts I would have perimeter patterns, matching the tooth spacing..
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@Murloc992 said in Prusa upgraded to duet, weird extrusion:
spring steel mesh belts
That might explain the excessive ringing shown on the other models, but I don't think it explains the diagonal pattern on the cubes.
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The primeter walls seem to be perfect when looked from above though.
Now that I zoomed the picture in, it seems microscopically blobby..?
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Were you able to test a different driver yet?
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I will right now.
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Same..
The light is non uniform but all of them look semi identical.
Left to right: the original one, 45 degree, 45 degree + swapped driverI made a video while printing this one:
Raise your volume a lot to hear the pulsing:
https://www.youtube.com/watch?v=wpG9eKp1ytAI know it's not the bondtech gear or the shaft for sure, as it is spinning slowly and pulsing dozens of times per rotation. Same was with the other motors.
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@Murloc992 said in Prusa upgraded to duet, weird extrusion:
Same was with the other motors.
Does the pulsing include your original 1.8º motors?
Ian
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No, in the beginning of this thread I posted some older pics using the old motors. All I had were VFAs and ghosting.
Actually in one pic I see faint diagonal pattern. I will test in the morning.
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I was gonna say i know what it is since i had something similar, when you said the motors didnt have flat spots i thought the set screw stands out too far and hits the other gear when doing a full rotation and presses the two apart for a second, but since you said it happens multiple times per revolution it cant be that... but might not hurt to check the set screw is flush anyway?
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It's not the set screw sadly. The extruder motor has a flat spot originally, others didn't but now have. A small metal file helped me with that.
Another interesting observation with the new motor:
10mm/s, 5mm/s extruder moves = smooth, but noisy.
1mm/s moves = pulsing is intense even without engaged gears.Old motor:
10mm/s, 5mm/s extruder moves = pulsing very very silently, but rapidly.
1mm/s moves = pulsing extremely, even more than the new one, but more silently.Video:
old motor, 800mA driver, 1mm/s retract move without engagement.https://youtu.be/rdDz5NVbe4k
(Increase the volume, a lot)https://youtu.be/LKBhyVVs9oE
(Can be heard way better in this one)Could it be the power supply? It's 3++ years old and has seen its fair share of life..
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@Murloc992 do you get the pulsing on extrusion with just extrusion not printing?
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@T3P3Tony said in Prusa upgraded to duet, weird extrusion:
@Murloc992 do you get the pulsing on extrusion with just extrusion not printing?
Every case is pulsing. Motor disconnected from the gears, connected to gears without plastic, extruding,etc.
I am getting an oscilloscope in the evening to check if I have PSU noise.
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@Murloc992 it would have to be extreme PSU noise I think to see regular pulsing on the extruder, also you say there is no pulsing on the X and ?
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@T3P3Tony said in Prusa upgraded to duet, weird extrusion:
@Murloc992 it would have to be extreme PSU noise I think to see regular pulsing on the extruder, also you say there is no pulsing on the X and ?
No pulsing can be heard on X and Y as they can be damped by the belts. I just returned my PSU to 12V, so I will see what that does.
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Even after setting my PSU to 12V it is the same.
The PSU dips to 11.4V while printing.
