I have a print that I’ve been working on, a tap handle, which includes an embedded nut for the faucet stud. I added a pause at height, inserted the nut, and resumed the print. After resuming, the subsequent layer is weak with a pronounced z-artifact around the entire print.
With PLA, the print can be broken apart easily at the layer line. PETG has better adhesion, but still somewhat ugly. The lower z-banding is an artifact of the internal structure of the handle, where there are solid layers across that longitude instead of a cavity. It’s dissapointing that those lines are pronounced as well.
My sense is that it would be dramatically improved by adding a signficant purge at resume. That could be accomplished manually, but it feels like something that should be incorporated in settings or manual gcode.
I have had this happen also. Did you happen to touch the print when inserting after the pause? Like with the print bed, if you touch the print during a pause it can cause the filament not to stick.
The unextruded part is not expected, but if you halt a print at a layer for any significant amount of time (significant vs the normal layer time!) you are probably going to end up with a very light z band like you have due to 2 factors: 1) Material cooling and contracting is black magic and was interrupted and is now nonuniform 2) It’s possible to micron-level bump the bed around when you insert stuff, and it’s just gonna be present.
I think a prime tower is the key here, to re prime the nozzle after the park and before the layer
I have had this happen as well. I don’t have a fix for it but would be interested to hear how to prevent it. I have noticed it when a spool runs out so I assumed the printer restarted at a spot further along than where the runout occurred.
nothing you can do about it really. It’s just what it is: you are interrupting the printing process causing unnatural cooldowns so that’s of course gonna have some heat related issues…
the pause insertion operation is a good technique, but it has to be done smart…
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I’m curious, what you mean by done smart?
I could design geometry to hide it, which is certainly one of the best tenants of 3dp, but that feels like a defeat.
I’ll try a significant purge before resume, but I’m curious about how to execute through a resume macro modification. Bambu seems to revert to defaults, ignoring custom inputs.
I’ll try a significant purge before resume, but I’m curious about how to execute through a resume macro modification. Bambu seems to revert to defaults, ignoring custom inputs.
