underextrusion or other issue
Here's a picture of a pressure advance tuning tower (chosen because it's easier to see the issue). It looks like underextrusion to me how there are little divots in the layers. I haven't tried everything yet, but as I go through more and more calibration procedures it bugs me more and sometimes invalidates the cal.
Any suggestions as to what to focus on?
21 Replies
extra info: v-core 3.1 400mm, rapido uhf (yes, with the .6mm volcano tip). Basically 100% standard build of that size.
I do have a bent lead screw but I'm pretty sure that's not the cause of this. filament is PLA .45 mm layer height
I do have a bent lead screw but I'm pretty sure that's not the cause of this. filament is PLA .45 mm layer height
Temp? Speeds?
100 mm/s default speed, which was what was recommended for the PA tower. Temperature was 205 first layer and 195 for others, 68/65 for the bed.
I do 215 for a 0.4 nozzle, 195 sounds much too low for a 0.6 nozzle
it's worth trying again at hotter temps, but the temperature tower was pretty weak at higher temperatures
That doesn't make sense. Normally it is stronger the hotter you print, but you lose detail as things are melty
sorry, I was misremembering. I did a temp tower from 180 to 210 (the max recommended temp for the filament) and the lower temps (180, 185) broke apart in the middle, and there were splits between 190 and 195, 200 and 205. tl;dr: you're probably right, and I definitely misremembered. 🙂
Forget the "max temp" as most manufacturers list those settings for much slower machines. You need to calibrate it yourself and figure out what temps you need for the speeds you want
it's not any better at 210 than it was at 195. If anything, it's worse.
So more under extrusion at hotter temps?
Not sure. Here's a picture.
Looks like you aren't getting enough squish. What other settings did you adjust when you went from 0.4 to 0.6 nozzle?
comparing the "0.45mm Klipper Tower" print settings I made based on the Klipper docs to the stock .2mm HF settings...
Perimeter and infill width set to .45mm (though infill is disabled)
speed lowered slightly
0 infill
max print speed = 300
max print volumetric speed = 12
first and base layer height = 0.45
(stock settings in superslicer i should say)
Why do you have the perimeter and infill width smaller than your nozzle?
habit? The Klipper instructions didn't say anything about setting the perimeter width for the tower test, and I basically copied, more or less, what I'd been doing on my ender 3 (which is mostly cura defaults, fwiw)
Try 0.65 for the perimeter and infill width
ok
like so?
Yes
It's looking much better. I can still see some inconsistencies in the extrusion if I look at it from an angle that shadows are visible but it's still a huge improvement
I'd post a better picture but it's now sufficiently featureless that I can't get one, at least not with my phone 😁