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Comment on Installed some bling chasing better z-axis layer alignment. The new parts do look nice, but at this point I think I'm chasing ghosts

JohnEdwa@sopuli.xyz ⁨2⁩ ⁨months⁩ ago

Extrusion variance and bad tolerance filament will also exhibit the exact same looking issues, not just poor Z alignment.

Just to be sure, you have z-hop disabled? That can cause all kinds of issues if the gantry isn’t absolutely perfect.
Another thing would be making sure all variable line width printing options are disabled, I.e ones that try to fill gaps with thicker lines or print thinner lines faster to stretch the filament.
And finally, melt temperature oscillations, making sure every feature - outer/inner walls and infill - are printed at the exact same, slower, speed.

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IMALlama@lemmy.world ⁨1⁩ ⁨month⁩ ago
Extrusion variance is one of the reasons why I was focusing on my extruder. I’ll have to try a different brand of filament though. I’ve been printing more or less exclusively in Pokymaker ASA. It’s cheap, and prints well enough, but I can’t find tolerance info on it.

Z-hop is not disabled, I’ll have to give that a shot. This is a Voron 2.4, which has geared and belted Z. I’ll have to do the math to see what the actual resolution per full step is later tonight.

I’ve given the gantry a once over twice now and everything seems square/right and moves freely.

Right now I’m thinking my order of attack will be:

Try a print in atomic filament PETG since I trust the quality of that filament to reduce one variable

Check belt tension all around

Run through Ellis’s tuning guide

Input shaper

Print a cube in vase mode (I have a bunch)

Disable thin walls

Disable z-hop

Reduce (or eliminate) micro steps

Slow down velocity and reduce accelerations
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- JohnEdwa@sopuli.xyz ⁨1⁩ ⁨month⁩ ago
  Start by checking if you have TMC drivers and if they have Stealthchop enabled, it can also cause these types of issues. Especially for the extruder motor.
  
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  - IMALlama@lemmy.world ⁨1⁩ ⁨month⁩ ago
    They’re TMC2209 drivers. Looking through my printer.config, I think stealthchop is disabled on all my motors. They each have this entry:
    
    stealthchop_threshold: 0
    
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