New: 3.0.8 Firmware released...
There is a new version of the Firmware up on the downloads page: http://www.prusa3d.com/drivers/ .
Change log:
Detailed Summary from GitHub:
This version improves some inconveniences of the XYZ/Z calibration and improves the print quality.
Detailed description of changes:
More descriptive messages on the XYZ/Z calibration:
Smoother prints of complex objects at high print speeds:
The path planner in the firmware consumes a considerable amount of computing resources. Each time a new movement is added to the planner queue, the complete planner queue of length 15 is recalculated. If a complex object is printed, the firmware cannot keep up and the printer starts to stutter: As the print queue dries up, the printer slows down. Then the planner queue fills, the printer accelerates and the cycle repeats. We rewrote some of the time critical parts of the planner from floating point to fixed point arithmetic to reduce the path planner stutter with complex objects at high print speeds.
Smoother prints of diagonal lines.
The Marlin firmware uses a Bresenham line discretization algorithm, where the fastest axis dictates the discretization rate of the slower axes. This technique introduces a jitter in the discretization of the slower axes, which manifests itself with high frequency ringing on diagonal lines. We improved the accuracy of diagonal moves by oversampling the Bresenham line discretization up to 8x. The oversampling rate is limited by the CPU speed.
Other changes:
Re: New: 3.0.8 Firmware released...
So are you a moderator?
Re: New: 3.0.8 Firmware released...
3Delight
Many thanks for the heads up on that one. Wouldn't have noticed it. Just flashed and so far so good... Seems to be even more accurate with calibrating.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: New: 3.0.8 Firmware released...
Be careful I've just tried to flash it and it failed (Update never finish).
I was on 3.0.3 firmeware on self assembled MK2.
I've tried to update to 3.0.8 firmeware and it goes horribly wrong.
As the update was taking ages, I let it go alone for about 15 min.
When I came back, it smelled like burned ABS.
The hotend was extremly hot and as the firmeware was updating, the fan did not start.
By the time I reboot the printer and reflash the 3.0.3 firmeware, the damage was done.
The ABS surrounding the hotend have melted and the hotend is now 2mm lower than before resulting in nozzle crashing on the bed.
the pinda probe is no straight anymore.
I tried to update it again, same result, the hotend is very slowly heating (+3 to 5C in a few minutes).
3.0.7 update is fine, but its impossible to update to 3.0.8.
I think maybe there is a leakage current to the hotend mofset during the update process.
Normaly the update is so quick that we can't see it, but I my case I let it alone long enough to get it very hot.
I've chat/email the support about it and I'm waiting for the answer.
In the mean time, if someone have trouble to update the firemware, do not let the printer unattended
Re: New: 3.0.8 Firmware released...
Be careful I've just tried to flash it and it failed (Update never finish).
I was on 3.0.3 firmeware on self assembled MK2.
I've tried to update to 3.0.8 firmeware and it goes horribly wrong.
As the update was taking ages, I let it go alone for about 15 min.
When I came back, it smelled like burned ABS.
The hotend was extremly hot and as the firmeware was updating, the fan did not start.
By the time I reboot the printer and reflash the 3.0.3 firmeware, the damage was done.
The ABS surrounding the hotend have melted and the hotend is now 2mm lower than before resulting in nozzle crashing on the bed.
the pinda probe is no straight anymore.
I tried to update it again, same result, the hotend is very slowly heating (+3 to 5C in a few minutes).
3.0.7 update is fine, but its impossible to update to 3.0.8.
I think maybe there is a leakage current to the hotend mofset during the update process.
Normaly the update is so quick that we can't see it, but I my case I let it alone long enough to get it very hot.
I've chat/email the support about it and I'm waiting for the answer.
In the mean time, if someone have trouble to update the firemware, do not let the printer unattended
...
Thank you for the heads up and keep us updated, if you can.
Currently running on 3.0.7 without any issues, so far.
Assembled MK2.
Re: New: 3.0.8 Firmware released...
I updated to 3.0.8 this morning without incident but I did have some temporary weirdness immediately afterwards. When I attempted to set temps via Octoprint the heatbed warmed up but the hotend ignored the request. Since then it seems to have reset itself OK and all is well. I did run through the selftest, XYZ calibration and live Z adjust Then ran a quick print which was fine.
Bill W
"Even old dogs can learn new tricks!"
Re: New: 3.0.8 Firmware released...
With all the problems with every new firmware I am sticking to my 3.0.3. has served me very well so far that I see no reason to update. especially on a weekly basis now it seems 😮
Re: New: 3.0.8 Firmware released...
I also had trouble updating the first time, my hotend was still cooling and the updater took over 10 minutes and did not finish. I closed the update application and tried again once the hotend fan was off and it worked. ¯\_(ツ)_/¯
Re: New: 3.0.8 Firmware released...
So are you a moderator?
No, I just seem to spot these last two updates before anyone else so thought it'd be the right thing to do to give everyone the heads up.
As I check quite often I suppose it's inevitable that I'll spot them quite soon after they go up. If it means saving Prusa a few minutes of time so they can get on with helping people and designing all the new tech for us to buy, then I don't mind doing it! 😆
Re: New: 3.0.8 Firmware released...
I do all my firmware updates on a cold Prusa Mk2 printer. I rarely get problems with the update process as cold no heat at start of update from ambient temperature < ie cold.
Nigel
Life is keeping interested and excited by knowledge and new things.
Re: New: 3.0.8 Firmware released...
> In the mean time, if someone have trouble to update the firemware, do not let the printer unattended
Thanks for the heads up. We will certainly look into this issue, though we have never experienced something like that. I agree with your recommendation. Please do't let the printer unattended during the firmware update, until this issue is clarified.
I believe this issue only affects some of the first MK2 printers shipped, where there is a bug in the firmware of the USB communication chip, which causes firmware flashing issues with some firmware images. The newer printers should be fine.
Vojtech
Re: New: 3.0.8 Firmware released...
I do all my firmware updates on a cold Prusa Mk2 printer. I rarely get problems with the update process as cold no heat at start of update from ambient temperature < ie cold.
My printer was cold.
It was not used for at least a week.
> In the mean time, if someone have trouble to update the firemware, do not let the printer unattended
Thanks for the heads up. We will certainly look into this issue, though we have never experienced something like that. I agree with your recommendation. Please do't let the printer unattended during the firmware update, until this issue is clarified.
I believe this issue only affects some of the first MK2 printers shipped, where there is a bug in the firmware of the USB communication chip, which causes firmware flashing issues with some firmware images. The newer printers should be fine.
Vojtech
thank you for the update. I was not aware of the USB communication chip bug.
Is there a way I can update it ? you're right my printer is one of the first shipped 🙂
Re: New: 3.0.8 Firmware released...
As I check quite often I suppose it's inevitable that I'll spot them quite soon after they go up
You can save some time by subscribing to the repo on github, you'll then get e-mails on new releases automatically. I got my e-mail on Thu, 1 Sep 2016 09:23:04 -0700. Unfortunately I got no time to show off with that here.
Re: New: 3.0.8 Firmware released...
As I check quite often I suppose it's inevitable that I'll spot them quite soon after they go up
Unfortunately I got no time to show off with that here.
😆
Also its "Prusa's" responsibility to let "its" customers know "they" have fixed bugs on "their" own forum. I hate seeing members having to do this. Although helpful thanks 3Delight but it pains me that your having to do it. I wish you would help all the other small business's like you do it would be wonderful to see. If Prusa is classed as a world wide small business anymore.... 🙄
I am sure they could employ someone to update the forum.
Re: New: 3.0.8 Firmware released...
The first MK2 shipped have a bug in the USB communication chip firmware, which makes the firmware flashing process unreliable for some firmware images. The 3.0.3 and 3.0.7 firmware images are known to flash just fine on these first MK2 printers with a buggy USB controller image. So if you have a trouble with flashing the 3.0.8 firmware, please try to flash the 3.0.7 firmware and you should be fine. It may take one or more tries before the flash process goes through on these first MK2 printers though. The bug in the USB controller does not affect USB printing. It is not trivial to flash the firmware of the USB communication chip. It requires an ISP programmer hardware and some non-trivial wiring.
We are using a stock Arduino boot loader as the other Arduino based RepRap projects do. There may be a devil in the detail we are unaware of and we will have to dig into the boot loader source code to understand what is happening. Sometimes one's expectations do no hold.
Until then, I recommend to run a firmware flashing process on a cold printer after a fresh reset, and do one more reset after a successful firmware flash before printing.
Vojtech
Re: New: 3.0.8 Firmware released...
Thank you Vojtech 🙂
Would you suggest flashing upwards slowly from 3.0.3/6/7/8 or go straight to 3.0.7 then 3.0.8?
Re: New: 3.0.8 Firmware released...
The first MK2 shipped have a bug in the USB communication chip firmware, which makes the firmware flashing process unreliable for some firmware images. The 3.0.3 and 3.0.7 firmware images are known to flash just fine on these first MK2 printers with a buggy USB controller image. So if you have a trouble with flashing the 3.0.8 firmware, please try to flash the 3.0.7 firmware and you should be fine. It may take one or more tries before the flash process goes through on these first MK2 printers though. The bug in the USB controller does not affect USB printing. It is not trivial to flash the firmware of the USB communication chip. It requires an ISP programmer hardware and some non-trivial wiring.
We are using a stock Arduino boot loader as the other Arduino based RepRap projects do. There may be a devil in the detail we are unaware of and we will have to dig into the boot loader source code to understand what is happening. Sometimes one's expectations do no hold.
Until then, I recommend to run a firmware flashing process on a cold printer after a fresh reset, and do one more reset after a successful firmware flash before printing.
Vojtech
I've all the needed hardware to do ISP programming.
If you can give me the needed informations/files by PM I'm willing to try to reflash the USB com chip and flash the 3.0.8 firemware to confirm whether it worked or not.
Re: New: 3.0.8 Firmware released...
> Would you suggest flashing upwards slowly from 3.0.3/6/7/8 or go straight to 3.0.7 then 3.0.8?
What I am trying to say is, that with the first MK2s, you may have a problem to flash 3.0.8, but you should be fine flashing 3.0.7. With the first MK2s due to the bug in the communication chip firmware, you may not be able to flash the 3.0.8 at all, but 3.0.7 shall work.
You should definitely try 3.0.8. If that does not work, try 3.0.7, that shall work in all cases.
Vojtech
Re: New: 3.0.8 Firmware released...
>With the first MK2s due to the bug in the communication chip firmware, you may not be able to flash the 3.0.8 at all.
After further research, would this fall under a warranty such that the chip (or whatever has the chip) could be replaced? I'm using 3.0.7, have not been able to update to 3.0.8. It's not a big deal now but it would be nice to be able to upgrade to the latest fw. Especially down the road if it's not possible to upgrade to later versions.
Re: New: 3.0.8 Firmware released...
Uh, how do you know if you have a "first" MK2?