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Comment on Chonky nozzel + decent amount of material = opportunity for lots of spaghetti

empireOfLove2@lemmy.dbzer0.com ⁨6⁩ ⁨months⁩ ago

Even 250 is a bit low for that high of a volume. Are you running a brass nozzle or a hardened/stainless steel nozzle? Steel nozzles will require even more hotend temp due to their low conduction rates. Eg, with the stainless nozzles on a Bambu P1S, I have to run ASA at around 260/262 for higher print speeds.

If stringing is a problem consider increasing the speed of your filament retraction (not distance) You may also want to turn off z-hop. Sounds wild I know, but it does help- by not lifting the nozzle during a rapid move, it “wipes” the nozzle clean as it moves off the part and reduces stringing. Realistically you shouldn’t use z-hop at all unless you have a part with a very small cross section that keeps falling over when the nozzle wipes across it. Which ofc, the big print I see in the photo looks like it will have zero stability problems, lol.

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IMALlama@lemmy.world ⁨6⁩ ⁨months⁩ ago
@Dettweiler42@lemmy.world, replying to you as well here.

This is a hardened steel nozzle. 260 looked a little rough, but 255 looks pretty good. The temp tower got knocked off the bed at 235. It does look like I’ll need to bump cooling a touch. Currently working on a retraction tower.

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If stringing is a problem consider increasing the speed of your filament retraction (not distance)

I’ll have to give this a go after this retraction tower prints. On the last one I printed there was basically no difference on any of the settings once it got above 0.2mm of retraction. In my time with the rapido, any filament left in the nozzle will ooze out if its left hot but it doesn’t string that badly.

You may also want to turn off z-hop. Sounds wild I know, but it does help- by not lifting the nozzle during a rapid move, it “wipes” the nozzle clean as it moves off the part and reduces stringing. Realistically you shouldn’t use z-hop at all unless you have a part with a very small cross section that keeps falling over when the nozzle wipes across it.

Yup, I’ve run into this realization too - that’s part of the reason why I was thinking to have z-hop on for this print

Which ofc, the big print I see in the photo looks like it will have zero stability problems, lol.

Adding two more bed fans, for a total of 4 (2 loose bed fans, 2 fans in my filter) and getting a bang on first layer (yay klipper_z_calibration) seem to have really helped with warping. I do have some ACM panels that I want to swap on to bump chamber temps up more, but I haven’t taken the time to print new magnetic inserts for them yet.

Knock on wood…

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- Dettweiler42@lemmy.world ⁨6⁩ ⁨months⁩ ago
  I’m definitely going to try the retraction speed (instead of distance) and no z-hop in the morning.
  
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