Surface quality issue
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Hi all,
I just replaced cheap 8-bit noname board with the Duet Wifi and seeing strange quality issues (see photo attached). On lower speeds (like 20-30 mm/s) flat vertical surfaces are showing some banding with interleaving diagonal stripes and normal-ish surface. The issue gradually goes away at ~60 mm/s where surface becomes much better.
I didn't see such issue with my old board, and I didn't change anything in the physical build, just replaced the board, so shouldn't be a mechanical problem.
Jerk, microstepping changes and acceleration do not seem to affect the issue.
It is a custom-built delta printer.
Duet is running on the latest firmware.
Any help is really appreciated.Thanks
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What motors are you using, and what currents have you set in the M906 command in config.g.?
What microstepping stepping are you using? (M350 command)
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I'm using some noname (Anycubic) 1.8ยบ NEMA17 steppers. Label says they're rated for 1.5A with 4.4mH inductance.
M906 sets 1200mA current, and for M350 I've tried 1/16 microstepping (80 steps per mm) and 1/32 (160 step per mm) without any noticeable difference. -
I'm also using Zesty Nimble extruder without much experience with using it. Checking with Zesty folks in parallel if it is extruder-related.
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Same firmware configuration & slicer settings except the speed is 60 mm/s instead of 24 (or 20 - can't remember) mm/s on the first print:
https://ibb.co/cE8bVF -
Maybe a temp issue? Looks maybe too hot?
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It looks to me like uneven extrusion, because there is a regular horizontal repeat on each layer that isn't lined up between layers. Also I think there is over-extrusion.
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Hi zlowred!
Did you resolve problem this?
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This problem was resolved.
It was due to the fault we detected in the cable manufacturing.
Our supplier admitted fault and all the cables have been replaced.
Full story here: https://zesty.tech/blogs/ramblings/no-problem -
Correct. Similar flat surface with exactly the same settings looks like this:
with the replacement cable
