During some of my prints I get black spots of burnt plastic.
I've seen it at 0.4 0.3 and 0.2 mm with varying support settings, but mostly on solid fills.
(no other settings changed)
At first it seemed random, but then it appeared symmetrically on some models, and seems reproducible.
As far as I can see:
It tries to deposit abs for too long in a small area, so it builds up a little to high
It then comes into contact with the extruder, and burns.
I'm not sure if the support builds up to high or if its the filling thats deposited too much.
But it just looks like it's hitting the same spot too often/long.
I will make some pictures and post them later.
But anyone else having this problem? Any idea what could be wrong ?
I was also wondering, what temperature readings do people get on the the extruder?
After a job is send to the printer and you open the maintain dialog, you can see both the bed and the extruder temperature.
When it "starts" it shows (the targets?) 100C for the bed and 260C for the extruder.
Then its switches to the read read values which slowly start to climb.
When the extruder hits 260C the printer beeps and starts the print job.
For a few seconds the temperature is still showing on screen and continues to climb, going over 270C..
On the other hand, the heated bed sometimes has not even reached 50C yet before it starts printing.
So for big builds I use the pre-heat function as a precaution, but seems a bit off.
But are these readings correct ? 260/270 ?
I thought ABS was best at 240 and starts to burn at higher?
Other than that, still amazed by the capabilities of Up!

Cheers,
Virtox