The 6.2.5 release to XL firmware makes hotends warm up much faster but with overshoot
Not sure if anyone else noticed this, but the updates to the FW 6.2.5 include a change to how the hotend PID controller handles heat. The commit comment is very telling - it was using the values for the Mini previously, instead of using the values from the MKx series.
You can see the commits here: https://github.com/prusa3d/Prusa-Firmware-Buddy/compare/v6.2.4...v6.2.5
The basic effect is to make the hotends heat up noticably faster, but they overshoot the target temp by 5 degrees and then settle back down. Perhaps this will make for slightly faster multi-tool printing when having to transition to/from idle temp at print startup (during the heat absorbing phase) for those who have not modified their start gcode. Not sure if a little overshoot may be a concern for very heat-sensitive materials - I'll leave that to the experts.
Personally, I took out the idle temp in the start gcode as it made print startup take way too long in my opinion. But for those of you tracking hotend temps in OctoPrint or other ways, no you are not losing your mind: the behavior is now different.
Brand new to 3D printing and my 5-tool XL is my first 3D Printer!Check out my Multi-Tool fork of PrusaSlicer to mix and match nozzle sizes.
RE: The 6.2.5 release to XL firmware makes hotends warm up much faster but with overshoot
Just a quick follow-up. In more testing, I have seen temperature overshoots of up to 8 degrees, which seems like too much. I may roll back to 6.2.4 since I never had any issues with stalling due to toolchanges as the patch notes for 6.2.5 suggest.
Brand new to 3D printing and my 5-tool XL is my first 3D Printer!Check out my Multi-Tool fork of PrusaSlicer to mix and match nozzle sizes.