Hi all. Question: pud autoninng can give us a pretty close to good PID tuning, but good tunning requires some extra adjustment. Can PID tuning be done WHILE printing a test object?
Thanks.

I don't see why not, though I don't know if you'd really want to do that. You need to edit the gcode manually to force the printing process to wait for the bed to cool as pid tuning is recommended to start with a bed/hot end at room temperature. This would only make sense when printing at high volume and PID needs to be tuned to account for cooling down the melt chamber when a lot of cool plastic needs to warm up.

Even better would be to have a range of PID settings that can be set based on extruded volume. I think I've seen this somewhere but I can't remember. I'm sure someone more knowledgeable will chime in.

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Kind regards
Imqqmi

NFAN CoreXY printer:
[reprap.org]

If you meant manual PID tuning by tweaking the PID parameters you've found earlier, then yes.