RE: 6.4.0-RC Firmware for Prusa CORE One
I'm actually reading the release notes now and stumbled across the following:
Lazier homing, more cautious calibration
[...] For unload operations with auto-retraction, homing is still performed to ensure the correct filament removal angle.
I had observed my Core One perform the homing before it unloaded filament, and had been wondering what the rationale was. But that text does not make it any clearer me. Could someone help me out and explain what the "filament removal angle" is, where it is measured, and how it depends on XYZ homing? Many thanks!
Without reading the fw code I'd guess the extruder push force implemented is a function of the bowden tube bend. Having it in a fix position allows to program a fix value. Biiig guess though 😁
RE: 6.4.0-RC Firmware for Prusa CORE One
Without reading the fw code I'd guess the extruder push force implemented is a function of the bowden tube bend. Having it in a fix position allows to program a fix value. Biiig guess though 😁
But a very plausible-sounding guess! I would never have thought of the Bowden tube angle, but that makes sense. Maybe they just want to put it into a "relaxed" position, avoiding unnecessary bends, to minimize friction. Thank you!
RE:
Tomorrow I’ll check it(firmware 6.4.0) on the printer at work (MK4S). I mainly print small parts using ROSA PA12+CF15 and ROSA FLEX 85A.
RE: 6.4.0-RC Firmware for Prusa CORE One
I just updated an MK4S, a CORE One, and an XL5T with this firmware. So far, so good. The alpha version didn't work at all on the MK4S, but now printing is going well, as usual. However, I haven't printed much yet.
Can't wait to test the XL improvement regarding the auto-retract:
Auto-retract improvements
The auto-retract system has been improved across the board, with particularly noticeable benefits for multi-tool prints on the XL. It now respects slicer-issued retractions and avoids adding redundant movements.
On the MK4, the print head now parks at a higher Z-height after print completion to make it easier to remove any ooze left by the auto-retract ramming process.
The CORE One (not +) is currently printing with this firmware.
RE: 6.4.0-RC Firmware for Prusa CORE One
@kachidoki
Thanks for the info! I'll give it another day or two to see if anyone reports negative experience before I update.
RE: 6.4.0-RC Firmware for Prusa CORE One
ok, against my better judgement I updated the MK4S and CoreOne. I was interested in some of the features listed. I'm currently doing a print on each machine. I'll let you know how it goes. The XL is currently busy, but I may update that after.
RE: 6.4.0-RC Firmware for Prusa CORE One
Printed two parts (PLA, PETG) on the new firmware (Core One). I didn’t notice anything concerning.
RE: 6.4.0-RC Firmware for Prusa CORE One
I've got one going on the mk4s in pla and one on the core one in petg. So far so good.
RE: 6.4.0-RC Firmware for Prusa CORE One
The XL is currently busy, but I may update that after.
You're my hero--I'm still traumatized by the experience last time. Let me know how it goes.
Formerly known on this forum as @fuchsr -- https://foxrun3d.com/
RE: 6.4.0-RC Firmware for Prusa CORE One
There has only been 1 commit between 6.4.0-RC2 and 6.4.0 related to crash recovery: https://github.com/prusa3d/Prusa-Firmware-Buddy/compare/v6.4.0-RC2...v6.4.0