Firmware 3.5.3-FINAL for Original Prusa i3 MK3S  

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jakub.d
(@jakub-d)
Member Admin

UPDATE: Final version is out https://shop.prusa3d.com/forum/general-discussion-announcements-and-releases-f61/firmware-3-6-0-final-for-original-prusa-i3-mk3s-mk-t28160.html

WARNING: This firmware is for the MK3S! Don't use it with the MK3.

Hi guys,
this is an initial firmware for the Original Prusa i3 MK3S. It is a final version recommended to all users.

What is new?
This is initial fw version for MK3S and MK2.5S printers. It contains all features from 3.5.2 firmware plus bed level correction range was enlarged to +-100 um. This firmware version is recommended only for single material printers (without MMU2 connected) and should not be used with standard MK3 and MK2.5 printers.
---

Supported printers:
Original Prusa i3 MK3S
Original Prusa i3 MK3S MMU2S
Original Prusa i3 MK2.5S
Original Prusa i3 MK2.5S MMU2S

Download link:
https://www.prusa3d.com/drivers/

Firmware flashing guide:
https://manual.prusa3d.com/Guide/Upgrading+the+firmware+v1.5/66

Please report any bug here:
https://github.com/prusa3d/Prusa-Firmware/issues

As always, we wish you happy printing and look forward to your feedback!

Assembly manuals / Knowledge Base
The guy behind Prusa assembly manuals......
Posted : 19/02/2019 11:46 am
james.m79
(@james-m79)
Active Member

Which version should we use for a MK3 that has the MK3S update kit (extruder) applied ❓

Posted : 19/02/2019 1:47 pm
jakub.d
(@jakub-d)
Member Admin

Hi James,
the difference between MK3 and MK3S is in the filament sensor

MK3 = Optical filament sensor => MK3 firmware
MK3S = New IR-sensor => MK3S firmware

Therefore as soon as you upgrade the MK3 extruder with the IR-sensor it becomes MK3S from the firmware point of view.

Assembly manuals / Knowledge Base
The guy behind Prusa assembly manuals......
Posted : 19/02/2019 1:55 pm
james.m79
(@james-m79)
Active Member

Thanks for the clarification!

Posted : 19/02/2019 7:25 pm
george.e7
(@george-e7)
Trusted Member

I don't have an MMU2 and haven't got my MK3S upgrade yet (ts on the wayc 😀 ) but here's a question anyway. Which firmware is recommended for a MK3S with MMU2 attached? 3.5.2 with the filament sensor disabled?

Posted : 19/02/2019 10:07 pm
jakub.d
(@jakub-d)
Member Admin

Hi,
MMU2S firmware is being finalized as we speak. It should be available soon.

Assembly manuals / Knowledge Base
The guy behind Prusa assembly manuals......
Posted : 20/02/2019 11:04 am
crashtest22
(@crashtest22)
New Member

having filament sensor issue...
does not seem to work at all anyone else?

updated mk3 to mk3s
sensor parts are moving as they should.

Posted : 25/02/2019 3:36 am
pbelcomp
(@pbelcomp)
Active Member


having filament sensor issue...
does not seem to work at all anyone else?

updated mk3 to mk3s
sensor parts are moving as they should.

I had the same issue after assembling my MK3S kit.

What I did to diagnose was to go to the sensor test, and see if you can get it to change when putting the filament in and out.

Mine didn't change, so I took the cover off, then removed the screw in the sensor board.

Once the board was loose, I could see that the little flag was right on the edge and when the sensor was screwed in place, the sensor was blocked and when I had the sensor loose, it was working.

I didn't want to disassemble to the whole unit (again), so what I did to "fix" it was to put a little plastic shim under the left side of the sensor board, which was just enough to make it work consistently. (I used a little strip that gets laid down when I start a new print)

Put the cover back on, taking care to not over tighten it.

My little flipper appears to be fully functional, so I'm not quite sure why it wasn't lined up correctly.

It has been fine since the fix.

Posted : 28/02/2019 7:36 am
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