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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

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IMALlama@lemmy.world ⁨7⁩ ⁨months⁩ ago

This makes me sad. The center and left cube are pretty solid in person until you get direct overhead light on them.

I just added another photo to the OP with a more diffused light sourced. It makes all three parts look pretty good.

I do kind of wonder if this is a compromised based on speed. I wouldn’t say I’m going fast, but I am running 110 perimeters and 3k accelerations. Maybe I should print a slower cube.

Other ideas are welcome :)

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seathru@lemmy.sdf.org ⁨7⁩ ⁨months⁩ ago
It may be a trick of the lighting. The picture you added looks much better. But I wouldn’t think you would be able to see that kind of errors just from light.

I’ll dig out some old prints tomorrow and see what they look like under a direct harsh light source. I say old because as soon as I started modding my printer, the quality went to shit. I may be able to print TPU and ABS now, but it definitely doesn’t look as good as before I started messing with it.

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- IMALlama@lemmy.world ⁨7⁩ ⁨months⁩ ago
  Haha, sounds like fun. This is a Voron 2.4 350, so it has the (dis)advantages of being big/having long belts and having a hot end that’s biased toward speed. I’ve run a spool of TPU through it somewhat recently and at this point I basically daily ASA. PETG parts look better, but I have not tried a PETG cube yet. Maybe I should.
  
  Thanks for digging around for pics! I appreciate the reference.
  
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ShepherdPie@midwest.social ⁨7⁩ ⁨months⁩ ago
You sure this isn’t some sort of flow issue? The z-axis should be judged based on measurements of the cube if I’m not mistaken (20mm cube = 20mm) while the look of the print is dependent on speed/flow/layer height/plastic quality. The extrusion looks pretty inconsistent, and I see a ton of ringing even without anything immediately near by to cause it (you can see it across the entire width below the little slashes from corner to corner).

I dunno what firmware you’re using, but with klipper, resonance compensation and input shaping can help eliminate things like this.

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- IMALlama@lemmy.world ⁨7⁩ ⁨months⁩ ago
  It might be a flow issue. I recently discovered that my hot end was coming apart, which was leading to some print inconsistencies. This is my first print after fixing that, and swapping extruder gears while I was in there. I’ll have to check my belts and take another pass through Ellis’s tuning guide.
  
  I am running klipper, and even have an accelerometer mounted to my tool head, but haven’t taken the time to put some temporary wiring in place to test/tune it. I’ll also have to do that. I do see some fine/faint ringing in the parts.
  
  As for these prints, they were printed fairly quickly on a 0.4mm nozzle with 0.2mm layer height in Polymaker ASA.
  
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