RE: XL firmware 6.4.0 alpha
Hmm, For me since the release everything works fine.
What I did:
Flash the new firmware then
switched the machine off and on again. (to really have a clean restart)
doing x/y Calibration.
calibrating the toolheads (with the pin)
Then started printing with all toolheads. Works perfectly, smooth and clean.
Crash detection is on. Silent mode is off. Input shaping is on.
BTW: If I am in need for help, usually for me it mostly works out to ask for an engineer by phone. (Well except you have one of those Scriptbook-Lubbers on the other end of the line)
Is there any engineer of Prusa reading this thread? - Give me a "Beep"... (I bet a good Swiss beer sent to prague on my expense, there will be no Beep)
RE:
It's not just alpha - the so-called "stable" release (6.4.0+11974, released on November 25) continues to have the bug. I just flashed the firmware (i.e. last night), and already suffered two crashes:
1. when I tried to park tool #1 - instead of going back to its dock, the tool veered to the right, and crashed into tool #2 with a vengeance, throwing tool #2 out of its dock. It happened so fast that I didn't have time to press the Reset button;
2. when I tried to calibrate the IS (Input Shaper) - the carrier locked tool #1 as it should, but then smacked to the right without first pulling the tool out of its dock. Nothing broken, though. (...Yet!)
I went back to the older firmware (6.2.6). While many features in the new firmware are desired, I don't want that piece of crap (i.e. firmware 6.4.0) to destroy my prints...or even worse, the printer itself. I'll wait until (and I'm saying it un-apologetically) the boneheads tweaking the firmware will get their act together, and release a working, bug-free version. For a $3,000+ printer this is unacceptable.
(P.S. I'm sending my comments to Prusa's customer service, too, so they're aware of the sentiment of (at least) one of their customers.)