RE: Xl extruder stops
I have two tool heads.
T1 is the tool that I have issues with and I just checked the board and it does not have the AVIAC nomenclature on it.
T2 works, and it also does not have the AVIAC...
T1 came from the first batch of XL printers and T2 came from an upgrade kit almost a year later. Did you get new boards from Prusa with the AVIAC on it? If so, have you been using it and have you had any issues with it?
If it resolves the issues I'll buy the board right now.
RE: Xl extruder stops
The microcontroller on the latest board is slightly different than the original one.
T1 -
STM32G070
RBT6
GQ20W
Same exact mc that is shown in this listing.
T2 -
STM32G070
RBT6
GQ244
RE: Xl extruder stops
Brian, that sounds then like the problem I have mentioned higher up in this thread.
For me, I was able to resolve this with PC-CF printed extruder parts.
But I am glad that it worked out!
After the day spent troubleshooting I was able to have success. I had 2 problems, one definitely self induced and the other is questionable.
1st was loss of preload on the extruder idler. With the whole bed at 100C vs. Only about half the bed (as I've printed in the past), allowed the temperature to get above 50C in the enclosure and likely even hotter at the extruder because it spent about 1.5 hours printing the first layer right next to the 100°C bed. This I believe softened the extruder idler parts causing it to lose preload. These parts probably should have been pccf, but my machine must have been built during the transition stage between PETG and PCCF as some of my parts are PCCF and some not. I also believe that they changed the design some because even looking at my other print heads they have marginal preload.
So my temporary solution was to shim the idler with a piece of plastic. Long term I'll be printing these from PCCF as soon as it gets back in stock. I'll also not be using the entire bed until the parts are replaced.
Notice the gap difference between the PCCF idler arm (1st pic) and the XL parts (2nd pic). The 3rd pic is my temporary solution.
@unicorn3d Did you use a hardened nozzle for the PCCF or did you just sacrifice a brass nozzle?bi have quite a few new brass nozzles so I might just sacrifice one, but I am not sure how long a brass nozzle would last. I want to make sure I can print everything.
The 2nd issue was 100% my fault as I realized that on the .2mm speed setting solid infill prints at 200mm/s! That speed might work for Prusament ASA, but Polymaker ASA is only rated at 50mm/sec max. I ended up lowering the volumetric flow so that the max speed was around 80 mm/s and raised the temp to 270. This appears to be working well.