Firmware 3.2.0-RC2 for Original Prusa i3 MK3  

Re: Firmware 3.2.0-RC2 for Original Prusa i3 MK3

Thanks Marek, I've been eagerly watching for this one 🙂

Re: Firmware 3.2.0-RC2 for Original Prusa i3 MK3

Nice, (the temp fix).

Now I am going to wait until more people tried it (RC1 did seem to cause quite some calibration issues) and then might just update

Re: Firmware 3.2.0-RC2 for Original Prusa i3 MK3

Works great for me. RC1 was hell

Re: Firmware 3.2.0-RC2 for Original Prusa i3 MK3

Working great here so far, no problems after the forced initial calibration.

Re: Firmware 3.2.0-RC2 for Original Prusa i3 MK3

This one works for me, too. No messages, nothing. Re-calibration not needed, as it seems. (i did re-run calibration after i went back to 3.1.3 from unsucsesfull RC1, though).

Re: Firmware 3.2.0-RC2 for Original Prusa i3 MK3

will it fix my stringing problem ? why is it always for "advanced users " , what about newbies ?

Re: Firmware 3.2.0-RC2 for Original Prusa i3 MK3

Hi Jaques,
more experienced users tend to know what issues are firmware derived and what are homegrown...

Nothing to stop you promoting yourself to 'experienced user' by loading the firmware, but you might find the potentially unstable test firmware causes unexpected issues.

however if you have an issue with the firmware, say ripping your PEI, you might not get a replacement, as you knowingly loaded test firmware....

Prusa will not knowingly release a defective firmware, however there so many ways that we can interact with the firmware that they may not have tried all configurations... this is why they suggest that only experienced users adopt the firmware initially.

Good luck if you try the RC2

sometimes you learn more, when things go wrong1

regards Joan

Re: Firmware 3.2.0-RC2 for Original Prusa i3 MK3

....

sometimes you learn more, when things go wrong1

regards Joan

If that were the case I'd be a genius!!! But seriously, you're absolutely correct. Jaques, I'm by no means an expert and my response will prove that... I find that stringing is related to settings in your slicer. I'm a big fan of Makergeeks PETG and before tweaking my slicer settings that stuff was stringy as all get out. I like to "try" to design things which for me is an iterative process so I often tweak my settings to see how it affects print quality, I have a slew of various saved test sittings in Slic3r.

Re: Firmware 3.2.0-RC2 for Original Prusa i3 MK3

Well, had some major problems with the printer regarding consistent first layer.
Upgraded to 3.2.0 RC2, did a factory reset and downloaded the newest Slic3r PE beta.

Lets see what this combination brings. Currently running through the calibration processes.

Re: Firmware 3.2.0-RC2 for Original Prusa i3 MK3

Spotted the release in Github this morning before it appeared in the forum. Perfect timing as I planned to compile and install an RC2 version from source this morning. So I just hat to download and flash this version. 😀

During the xyz calibration the nozzle started to slightly drag the paper on the first point. Not really digging into the bed more like what you aim for with manual bed leveling just a bit lower. Became nervous and cancelled the calibration. Repeated it, same result, cancelled again.

Then I lowered the PINDA a quarter turn and redid the calibration. Again dragging the paper on the first point but it seemed to be a bit less. So I crossed fingers and let the calibration proceed. Dragging didn't get worse. And for calibration points 2, 3 and 4 there was no more dragging.

Calibration went through without error. 🙂

First testprint looked great.

Would like to know from Prusa, whether this slight dragging of the paper at the first point is intentended or if I should have lowered the PINDA even a bit more. For the record: The printer came assembled with 3.1.3 and during xyz calibration there was no dragging with the PINDA at its original position. So it seems 3.2.0-RC2 uses a lower height during xyz calibration.

If the slight dragging of the paper is intended, the text displayed in the assistant needs to be changed in the release version. Otherwise everybody is cancelling the calibration immediately.

If it is not intended and the PINDA should be lowered until no more dragging happens, this should be also mentioned in the text (i.e." lower PINDA and repeat calibration until no more dragging of the paper occurs"). Currently it only tells you to cancel the process immediately but not what to do next. As calibration data has been erased at the beginning of the process, you are left with a non-functional printer until you manage to complete the calibration.

Re: Firmware 3.2.0-RC2 for Original Prusa i3 MK3

Well, my nozzle didnt drag the slightest bit and I had to adjust the live z value up to -0.900 to get a satisfactory result.

Even then I noticed the inconsistent extrusion.
I just cant pintpoint why my first layers are so rough and either lift or dont stick at all with big first layer surface prints.

First layer looks perfect if its a single line, as soon as lines are squashed together side by side, the surface gets really rough.

Well, currently running the PID calibration and afterwards the temp one.
Then a 20mm test cube and afterwards a benchy.

Re: Firmware 3.2.0-RC2 for Original Prusa i3 MK3

During the xyz calibration the nozzle started to slightly drag the paper on the first point. Not really digging into the bed more like what you aim for with manual bed leveling just a bit lower. Become nervous and cancelled the calibration. Repeated it, same result, cancelled again.

I'm seeing exactly the same with 3.2.0-RC2. Never had this before.

Re: Firmware 3.2.0-RC2 for Original Prusa i3 MK3

Well, my nozzle didnt drag the slightest bit and I had to adjust the live z value up to -0.900 to get a satisfactory result.

That means your PINDA is way lower than mine. My live z is more in the -0.350 range even after I lowered the PINDA. That likely explains why you didn't have the issue with dragging.

I wonder why Prusa decided to run the xyz calibration at lower height. While it is not a big issue to lower the PINDA a bit, it seems unnecessary to force a lot, maybe even the majority of MK3 owners to adjust their PINDA to do a successful xyz calibration in 3.2.x firmware.

Re: Firmware 3.2.0-RC2 for Original Prusa i3 MK3

With this Firmware, after a detected filament-runout and autoloading the new filament, the temperatures and fan go to 0 and is says "Heating...".
Anyone with the same Problem?
Then i corrected the temp in the tune-menu it luckily continued to print.

Re: Firmware 3.2.0-RC2 for Original Prusa i3 MK3

I just tried 3.2.0-RC2 and got a significant layer shift when printing benchy. 3.1.3 is on the left, 3.2.0RC2 is on the right. I'm rolling back to 3.1.3 for now.

Re: Firmware 3.2.0-RC2 for Original Prusa i3 MK3

Well, my nozzle didnt drag the slightest bit and I had to adjust the live z value up to -0.900 to get a satisfactory result.

Even then I noticed the inconsistent extrusion.
I just cant pintpoint why my first layers are so rough and either lift or dont stick at all with big first layer surface prints.

First layer looks perfect if its a single line, as soon as lines are squashed together side by side, the surface gets really rough.

Well, currently running the PID calibration and afterwards the temp one.
Then a 20mm test cube and afterwards a benchy.

According to support your PINDA height is optimum when your live z is between -0.800 and -0.900

Re: Firmware 3.2.0-RC2 for Original Prusa i3 MK3

Well, my nozzle didnt drag the slightest bit and I had to adjust the live z value up to -0.900 to get a satisfactory result.

Even then I noticed the inconsistent extrusion.
I just cant pintpoint why my first layers are so rough and either lift or dont stick at all with big first layer surface prints.

First layer looks perfect if its a single line, as soon as lines are squashed together side by side, the surface gets really rough.

Well, currently running the PID calibration and afterwards the temp one.
Then a 20mm test cube and afterwards a benchy.

According to support your PINDA height is optimum when your live z is between -0.800 and -0.900

Interesting. I used to be about -0.750 but after the 3.2.0-RC1 I moved my probe down about a quarter turn just to keep the nozzle from dragging the paper. in RC2 I don't have that problem, but now my live-z is right about -1.000 give or take. May want to adjust again, just tired of performing calibrations and need to keep printing. So far 4 hours into a 9 hour print and RC2 is working quite well.

Re: Firmware 3.2.0-RC2 for Original Prusa i3 MK3

That means your PINDA is way lower than mine. My live z is more in the -0.350 range even after I lowered the PINDA. That likely explains why you didn't have the issue with dragging.

I find the PINDA detects on the PEI sheet that comes with the mk3, it detects at approx 1.6mm ABOVE the PEI sheet. This would indicate that your PINDA probe is 1.25mm ABOVE the PEI sheet, when the nozzle is touching it.

I bet you can take three pieces of paper, and "feel" the nozzle compress the paper, when doing the 9 point calibration. I also bet you get little "blobs" all over your PEI sheet, during the 9 point calibration. 🙂

I like to keep my LiveZ in the neighborhood of 0.9mm to 1.1mm. If there's enough warping to cause the PINDA to crash, the print was a FAIL already. And it keeps the nozzle ~1mm from the PEI sheet during 9 point calibration.

If you do the PINDA placement as described in "PreFlight Check" you should be ~0.700.

PS: I'm running RC1, and I just started a 23 hour print, and have completed ~60 hours of prints on RC1. Due to the method of print, I am stuck at RC1, until I finish this ~200 hour print.

Re: Firmware 3.2.0-RC2 for Original Prusa i3 MK3

Well I tried another benchy print with RC2 and I didn't get a layer shift this time. First attempt with layer shift on left, second attempt on right. Maybe the layer shift was a fluke so I'll keep running RC2 for now.