RE:
This is the release candidate for the upcoming firmware 6.4.0 for the Prusa CORE One, MK4S, MK4, MK3.9S and MK3.9.
According to blurb it goes on to say "Builds for XL, MINI, MK3.5S and MK3.5 are temporarily not included due to identified issues currently under investigation."
Confused? - I am!
Prusa originally targeted all FDM printers (except for the HT90, which is a different beast). The 6.4.0 alpha release notes still listed them all. But apparently they identified issues with the older printers which were so fundamental that they decided to take them out of the scope for the RC already. Not sure what the critical technical difference is between the older and newer models -- different stepper motors? Different (x)Buddy board?
RE: 6.4.0-RC Firmware for Prusa CORE One
The line by 3d-gussner
"The CoreOne L firmware had to be released with the launch. Testing one printer is quite easy and fast."
if true - why has it took so long for the Core One? Seems to have got abandoned around September sometime..
But that's his point: 6.4.0 is not just "for one printer". It is meant to be the unified firmware for all Prusa FDM printers (maybe with the exception of the Core One L now that they have split it out). The RC version already seems to work pretty well on the Core One; it's the other printers, and most notably the XL, which have major problems.
This is the release candidate for the upcoming firmware 6.4.0 for the Prusa CORE One, MK4S, MK4, MK3.9S and MK3.9.
According to blurb it goes on to say "Builds for XL, MINI, MK3.5S and MK3.5 are temporarily not included due to identified issues currently under investigation."
Confused? - I am!
The 6.4.0 alpha (a few days older than the RC version) was the one that broke a lot of configs. The RC version has the exclusions you mentioned as consequence.
Errors do happen and I can live with that, what is really annoying is the lack of a stable release for the core one since july 17th. I know that the RC version is for many "good enough" (I am still running the 6.4.0 alpha without issues), but a lot of users do not want to run preproduction software and I usually follow this rule as well. The alpha install was only done to get the new belt tuner.
I will not start a discussion on the merits of one huge sw package covering a slew of configurations vs. multiple sw branches because, frankly, Prusa will do whatever they want with the resources they have no matter what we discuss here 😀
RE: 6.4.0-RC Firmware for Prusa CORE One
Soo, RC2 just dropped. https://github.com/prusa3d/Prusa-Firmware-Buddy/releases/tag/v6.4.0-RC2
Given how long it took I expected more bug fixes. No mentions of the bugs that I ran into or filed…
Well, flashing it right now.
RE: 6.4.0-RC Firmware for Prusa CORE One
You're braver than I
Soo, RC2 just dropped. https://github.com/prusa3d/Prusa-Firmware-Buddy/releases/tag/v6.4.0-RC2
Given how long it took I expected more bug fixes. No mentions of the bugs that I ran into or filed…
Well, flashing it right now.
RE: 6.4.0-RC Firmware for Prusa CORE One
Cool, they patched the two bugs I reported.
RE: 6.4.0-RC Firmware for Prusa CORE One
Did anyone watch this video: https://github.com/prusa3d/Prusa-Firmware-Buddy/issues/4812#issuecomment-3549418531
The sound the XL makes when trying to home is just—wrong.
I think I'll stick with 6.2.6 for now...
Formerly known on this forum as @fuchsr -- https://foxrun3d.com/
RE: 6.4.0-RC Firmware for Prusa CORE One
ouch. I'd be ever so upset if mine started sounding like that. On 6.2.6 I stay until I hear better news lol
Did anyone watch this video: https://github.com/prusa3d/Prusa-Firmware-Buddy/issues/4812#issuecomment-3549418531
The sound the XL makes when trying to home is just—wrong.
I think I'll stick with 6.2.6 for now...
RE:
No mentions of the bugs that I ran into or filed…
Credit where it's due, both #4868 and #4835 seem to be fixed
Passed by my printer and unloaded and reloaded the filament, no bed dropping and nozzle cooled down from printing temp after the process completed.
Seems it's now pegged at 170 ºC though. I'm going to give the benefit of the doubt that that's somehow intentional, also it makes sense if you immediately want to start a print. Probably a feature?
RE: 6.4.0-RC Firmware for Prusa CORE One
Ok, against better knowledge I installed RC2 on half of my Core Ones. I am in the workshop today, so I can observe them. And even better, they all are on the same order, so I can compare the output. Lets wait and see. Interesting enough, my Core Ones were all too loose on belts, but really square. All of them.
RE:
Did anyone watch this video: https://github.com/prusa3d/Prusa-Firmware-Buddy/issues/4812#issuecomment-3549418531
The sound the XL makes when trying to home is just—wrong.
I think I'll stick with 6.2.6 for now...
No - as this is an XL not Core one. Wrong group..
RE: 6.4.0-RC Firmware for Prusa CORE One
Ok, against better knowledge I installed RC2 on half of my Core Ones. I am in the workshop today, so I can observe them. And even better, they all are on the same order, so I can compare the output. Lets wait and see. Interesting enough, my Core Ones were all too loose on belts, but really square. All of them.
I've downloaded it but "may" leave it for a day or so and look for any new bug reports having been bitten before.
RE: 6.4.0-RC Firmware for Prusa CORE One
I'll give a pre-final verdict (intended as pun for another RC) probably tomorrow after a few prints. But at the first glance, if this including the belt tension tool (yes, adjusted the tension according to it), should have solved at least the VFA issue,... well
RE: 6.4.0-RC Firmware for Prusa CORE One
I'll give a pre-final verdict (intended as pun for another RC) probably tomorrow after a few prints. But at the first glance, if this including the belt tension tool (yes, adjusted the tension according to it), should have solved at least the VFA issue,... well
VFA's are still there if you look for them. Personally, all my parts are functional so I don't really care about it. But, I don't think the VFA's have been definitively solved yet. It may take switching to 1.5mm belts.
RE: 6.4.0-RC Firmware for Prusa CORE One
VFA wasn't my primary issue neither. Just a little side thingy that was highlighted world wide by the media as being under control now. I was rather looking at homing performance, instabilities, prusa connect fails, USB issues, display crashes, sort of funny behaviour under certain circumstances, sudden resets mid print,...
RE: 6.4.0-RC Firmware for Prusa CORE One
@huskyte
was your core one upgraded from an MK4S, built from kit, or pre-assembled? I'm curious if any issues are folks are having with core one are related to reusing some components from MK4S upgrade etc. My core one was upgrade from MK4S, so reuses the heatbed, powersupply and main board from the MK4S. Other than initial issues I had after I just built it, it's reasonaably solid for rigid filaments using the 6.3.4 firmware. I prints 92A+ tpu ok, with the bogie mod in the extruder(to prevent filament winding around the extruder gear). I haven't had any other issues with it. But I also haven't tried any of the 6.4.x RCs either. I could see issues with new/older parts causing variation in behavior. Just random thought on my part.
RE: 6.4.0-RC Firmware for Prusa CORE One
@huskyte
was your core one upgraded from an MK4S, built from kit, or pre-assembled? I'm curious if any issues are folks are having with core one are related to reusing some components from MK4S upgrade etc. My core one was upgrade from MK4S, so reuses the heatbed, powersupply and main board from the MK4S. Other than initial issues I had after I just built it, it's reasonaably solid for rigid filaments using the 6.3.4 firmware. I prints 92A+ tpu ok, with the bogie mod in the extruder(to prevent filament winding around the extruder gear). I haven't had any other issues with it. But I also haven't tried any of the 6.4.x RCs either. I could see issues with new/older parts causing variation in behavior. Just random thought on my part.
Mine was upgraded from a MK4S which started out as an MK4. It's now decent printer in that I no longer have an issues with it.
With regard to the TPU bogie mod, it has one flaw in that I can no longer print rigid filaments. I'm unable to push PPA-CF through it now. There is a bogie mod for 1 or 2 pulleys that snaps on. I might take that idea and remix it. That or put the old one back.
RE: 6.4.0-RC Firmware for Prusa CORE One
I'm curious if any issues are folks are having with core one are related to reusing some components from MK4S upgrade etc.
I think there are just several aspects of the Core One design which are a bit "on the edge". It probably depends more on luck whether they work or cause problems, than whether the printer was factory-built, a full kit, or an upgrade:
- Long ribbon cable to the display, maybe even more problematic because it runs along the stepper motor cables, can cause display malfunction at full data rate.
- Cable routing in the umbilical cord to the print head, which may cause excessive crosstalk from heater to load cell.
- No defined grounding path for the XY stepper motor chassis; if the paint layer is intact, lack of grounding causes static buildup and crashes.
- Precise sensing of home position via motor stalling depends too critically on the bumping pattern, and hence gantry alignment.
- ... and probably a few more I can't think of at the moment.
The "different pitches in the three Z lead screws" may be exclusive to full kits and upgrade kits, since they combine motors from different manufacturing lots. (Two from the MK4S or the pre-packaged motor kit, one extra.) In contrast, I assume Prusa technicians get three Z motors from the same shelf when building printers in the factory.
RE: 6.4.0-RC Firmware for Prusa CORE One
@hyiger
I've not yet run into any issues, but I'm imagining you do a LOT more printing than I do and with more varied materials. I pretty much just do PLA, PETG, TPU and some ABS/ASA on occasion. Not having to open my extruder because I tried to feed tpu through too fast has saved my sanity. Probably the most rigid thing I have is this spool of Aquasys 120 I bought years ago. That thing was entirely too stiff to work in the MMU2S which is what I bought it for(soluble supports). I can't say I've tried to print with it since I put the bogie mod in my XL, core one and remaining MK4. I tend to use BVOH as my soluble when I need to do stuff needing soluble interfaces. Perhaps next time I need to do soluble supports/interfaces I'll crack open that aquasys 120 and try it. I did a print of an iphone case the other day on the XL that used tpu, pla as support material and bvoh for soluble interfaces and that worked great first time.
RE: 6.4.0-RC Firmware for Prusa CORE One
@hyiger
I've not yet run into any issues, but I'm imagining you do a LOT more printing than I do and with more varied materials.
Advancing in my model rocket hobby now requires the use of advanced engineering materials. Basically stuff that can handle Mach 2 and a lot of heat. I'm not certified at that level yet but trying to use my Core One to get me there. Definitely waiting to get my hands on the new 400C hot end.
RE: 6.4.0-RC2
Auto open/close Vent is not fully working. Opens or closes the Vent only after power up / start first print.
After print it is not closing the vent, what would be a good idea because of dust can come in