So I'm getting thermal runaway errors when printing a simple temperature tower from 220°C till 180°C using cura's calibration shapes.
Anyone else experiencing the same issues??
My guess is that the firmware currently checks if the hotend temperature is a certain value above the set point and triggers a thermal runaway if it is above that point...Not sure.
I've attached my gcode.
Edit: I can't attach my gcode here so I used pastebin
Okay. I decided to switch to Prusaslicer. That seems to have fixed the jamming issues. My best guess....It might have been the fans being on 100% right after the first layer. Prusaslicer has a low fan speed at big layers and only uses 100% on small layers. It might be that the fans cool down the tip too much and that causes the PLA to solidify in the tip. Not sure
Nope. Still got issues.
The PTFE tube pops off at the top it seems. Small prints are fine. No issue. but every big print I tried just ends up in the PTFE tube popping out of the extruder. I bought some different tube. Hopefully higher quality and I am going to try it with that.
Now researching retract distance vs jamming rate. It seems I need a high retract distance.
It appears that changing the spool position did the trick. I'm currently the furthest into my temperature tower I've ever gotten without jamming.
Edit: Nope. It still jams and does this to my PTFE tube
Have you tried leveling without the fan duct? :D or just cut off a bit of the above material, you don’t need it anyways
Aah! No, that gap is even smaller for me than it is in your picture.
I mean this gap
Are you sure your Hotend sits on or in front your PTFE tube? Had a similar problem so the Fan duct was too far away from the metal plate because the fitting between PTFE and Fan Duct was to small. Had to cut a bit of the duct away that it fitted correctly
I think I figured out why it is always skipping during ABL....You know when it goes by the front about 1 mm away from the front edge of the top section? Well....That top square isn't cut straight. There is a 1 mm deviation across the front causing it to bump into it when doing the front pass throwing the axes out of wack....I'll need to reprint the hotend shroud and include a little thing to allow it to pass by this without bumping into the top section....
It seems it is unable to maintain 220°C with the fans on 100% even after (another) PID autotune.... At least at low layer heights. Once it goes up a bit it is fine with it.....This is a bit sucky..
It occurs on layer 4. Fans turn on at layer 3. It only occurs when the temperature goes from high to low. It seems it doesn't occur when the temperature goes from low to high. I will do another PID Autotune once this low to high temperature tower is done.
When the error occurs the printer turns off for a brief second. No logs are available but my sitting next to it just before it occurs I can check the error it gives
Do you know where the runaway occurs? Had that on my old Cartesian printer one time because of a broken thermistor and one time due to loose connectors. maybe also do a PID Autotune for the hotend and the bed (but only if you haven’t got the Mic6 upgrade!)
Marlin should also have logs where you pretty surely can see, where the problem occurs. And as always, check your connections if you get a hardware error :)