XL firmware 6.4.0 alpha  

RE: XL firmware 6.4.0 alpha

Known issue. Several issues related to head crash logged on Github. Why they didn't detect that before releasing the firmware is beyond me.

RE: XL firmware 6.4.0 alpha

Perhaps the beta version will be better. Personaly i wait for the official version because i Had 3 head crashes and the belts  screamed.

RE: XL firmware 6.4.0 alpha

Yeah, I had the belts actually ripped out of their holders...

It is telling (in several ways) that they moved from alpha to RC (no beta for reasons unknown to mankind) for other models but NOT the XL (and some others). I'm sure they're working on it but given how many reports there are on Github I wonder if they actually ever tested the alpha on an XL… Very disappointing.

RE: XL firmware 6.4.0 alpha

Same here.  I am having the same problem too.  

Even when using a single tool head, mid print it will skip the belts.   Now the job is ruined by the rehome process.  The layers are off center.

Had to go back to previous firmware.

RE: XL firmware 6.4.0 alpha

Same here.  I am having the same problem too.  

Even when using a single tool head, mid print it will skip the belts.   Now the job is ruined by the rehome process.  The layers are off center.

Had to go back to previous firmware.

RE: XL firmware 6.4.0 alpha

It seems that version 6.4 of the software has a toolhead collision issue. After updating to 6.4, I also experienced frequent collision alarms during the toolhead docking process after prints were completed. Upon checking, I found that the issue occurs when the printer homes and purges the tool at the beginning — it makes an unusual noise and the homing position becomes misaligned. All of these problems disappeared after I downgraded the firmware to version 6.26. Try downgrading the firmware and see if the issue is resolved

RE: XL firmware 6.4.0 alpha

I sure am thankful I am not the only one who is having this issue. Anyone having bed leveling issues now?? This thing is now trying to take 21 leveling measurements along with 5-10 small ones inside of those 21 and its taking 30mins. Then after it takes the measurements it fails. I have never had this issue unless a big glob of goo was stuck on the end of the nozzle. Anyone else??

RE: XL firmware 6.4.0 alpha

Just incase anyone else is having issues with this I just talked to Prusa and yes they are having issues with the same things. I went back to the 6.2 firmware and all the problems "so far" have gone away.

RE: XL firmware 6.4.0 alpha

Posted by: @rufus

I sure am thankful I am not the only one who is having this issue. Anyone having bed leveling issues now?? This thing is now trying to take 21 leveling measurements along with 5-10 small ones inside of those 21 and its taking 30mins. Then after it takes the measurements it fails. I have never had this issue unless a big glob of goo was stuck on the end of the nozzle. Anyone else??

Same + colission with dock after every print. No collision during dock calibration. So frustrating.

RE: XL firmware 6.4.0 alpha

Same crash issues here.

Beware if you have enabled the Alpha-auto Update in the Prusa App.

The printer will download and propose updating to Alpha. 

Which of course will give us "Prusas collisive red light show".

I noted that after manually fixing the docking and continuing to print, there is a shift of exactly 5mm on the X-Axis.

When looking at the crash position, it seems it is 5mm offset in the other direction.

While calibrating (fiddling the sticks and screws) it does fine. 

Druring print pretest and filament change or manual pickup of the toolheads it does fine. 

Just while printing it crashes on pickup of the second tool.

While calibrating it does hit the sledge hard into the left railing - Different than version 2.4.0. 

So the error has to occur 

a) while calibrating just before each print or

b) somewhere in interpretation of the Gcode which is unlikely.

Solution: 

Fix it before all buy a Bamboo.

Workaround:

Downgrade to stable version and disable automatic proposal of alpha-Versions.