Upgraded extruder assembly to a 2.5S But with MK2 BED
 
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mechee
(@mechee)
New Member
Upgraded extruder assembly to a 2.5S But with MK2 BED

Hi guys!

I need help!

 

I upgraded my prusa MK2 extruder assembly to an 2.5S, but i did not upgrade the bed.
I cant get the firmware of the 2.5s to calibrate (XYZ).

It can see the first dot but not the 2:nd one i guess i need to modify the firmware for this to work?
It seemse like the calibration dots is not exactly placed at the same spot on the new heated bed vs the old one.

Can someone help me with this thanks

Posted : 21/08/2019 3:08 pm
timo.m
(@timo-m)
Estimable Member
RE: Upgraded extruder assembly to a 2.5S But with MK2 BED

This may have to do with the position of the pinda on the mk2.5 extruder compared to the mk2 extruder (referring to distance from endstops).

What firmware are you running on it?

Posted : 21/08/2019 3:25 pm
mechee
(@mechee)
New Member
Topic starter answered:
RE: Upgraded extruder assembly to a 2.5S But with MK2 BED

Hi !

 

I've tried with the latest MK2S firmware and latest MK2.5S firmware without any success...
I guyss i need to modify the FW somehow?

Posted : 21/08/2019 3:37 pm
JoanTabb
(@joantabb)
Moderator
RE: Upgraded extruder assembly to a 2.5S But with MK2 BED

the Mk2 Printer used a Mk42 heatbed
the mk2.5 printer uses a Mk52 12volt Heatbed. 

the Calibration sense pads are in different positions

can you fit the Mk52, 12 volt heatbed and use the latest Mk2.5 firmware?

 

Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 22/08/2019 12:46 am
mechee
(@mechee)
New Member
Topic starter answered:
RE: Upgraded extruder assembly to a 2.5S But with MK2 BED

Hello I don't have the MK52 12v heatbead. I have the original one from MK2 build and i still would like to use it together with the MK2.5S extruder assembly. I guess i need to modify the firmware for this to work?

Posted : 22/08/2019 8:40 am
JoanTabb
(@joantabb)
Moderator
RE: Upgraded extruder assembly to a 2.5S But with MK2 BED

If you want to use  the new extruder with the old heatbed, you might get away with using the Mk2 firmware, and revise the  E Steps setting,  the reason for this are that the mk2 extruder uses a smaller hobbed gear to drive the filament, and with the newer larger Mk2.5 hobbed gear, you will be over extruding on the base firmware. 

there is information in this thread https://forum.prusaprinters.org/forum/original-prusa-i3-mk3s-mk3-prusa-i3-kit-archive/calibrate-extruder-e-steps/#post-30216

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 22/08/2019 10:24 am
mechee
(@mechee)
New Member
Topic starter answered:
RE: Upgraded extruder assembly to a 2.5S But with MK2 BED

Ok but i've tried to do an XYZ calibration with the MK2S firmware with no success, note that i've installed the pinda probe V2 same as the 2.5S extruder assembly.

Also i want to use the MK2.5S fw as it has some usefull features for e.g. the filament sensor...
I guess i need just to adjust where the calibration points are in the code for the mk2.5s fw?

 

Posted : 23/08/2019 3:10 pm
JoanTabb
(@joantabb)
Moderator
RE: Upgraded extruder assembly to a 2.5S But with MK2 BED

you are trying to run a hybrid printer on stock firmware, that's going to cause issues... 

you would be best adjusting the firmware, however you may be unable to use mesh bed leveling without the Mk52 bed.

good luck,

I chose not to revise the firmware when I fitted the Mk52 bed to my Mk2 MMU1 printer,

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 23/08/2019 4:26 pm
danielkrah
(@danielkrah)
Eminent Member
RE: Upgraded extruder assembly to a 2.5S But with MK2 BED

Hi you have to comment this two lines out:

https://github.com/prusa3d/Prusa-Firmware/blob/9a60dd259bb69b14cc821c9db81acb59bd69254b/Firmware/variants/1_75mm_MK25S-RAMBo13a-E3Dv6full.h#L27-L28

as far i understand the firmware then the printer should use the mk42 routines.

Posted : 06/09/2019 11:01 pm
Sorav
(@sorav)
Eminent Member
RE: Upgraded extruder assembly to a 2.5S But with MK2 BED

https://www.dropbox.com/s/kcmzs83dcr2a49j/Firmware.ino.rambo.hex?dl=0

...
Posted : 12/09/2019 6:03 pm
fake
 fake
(@fake)
New Member
RE: Upgraded extruder assembly to a 2.5S But with MK2 BED
Posted by: @sorav-g

https://www.dropbox.com/s/kcmzs83dcr2a49j/Firmware.ino.rambo.hex?dl=0

is this firmware is for mk2.5 with hotbed mk42?

Posted : 30/01/2021 2:44 pm
JoanTabb
(@joantabb)
Moderator
RE: Upgraded extruder assembly to a 2.5S But with MK2 BED

I would like mk2 mmuv1  firmware for a 12 volt mk52 heatbed!

regards Joan

 

 

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 30/01/2021 3:12 pm
danielkrah
(@danielkrah)
Eminent Member
RE: Upgraded extruder assembly to a 2.5S But with MK2 BED

Works for me with a MK42, MKS gen 1.4, Pinda2 probe.

I didn't check the filament sensor. But i am also not using it on my MK3.

After upgrading to a Standalone geared BMG extruder i removed it completly. 

https://github.com/cimoalpacino/Prusa-Firmware/tree/MK2S_MK25_3.9.1_RAMPS

Posted : 30/01/2021 6:51 pm
Hillinator
(@hillinator)
New Member
RE: Upgraded extruder assembly to a 2.5S But with MK2 BED

@danielkrah

I attempted to commit out the two lines you suggested, but the compiler will not compile because it breaks the code. I am afraid there is a lot more that has to be done for this firmware to work with the mk42 heat bed. 

Posted : 12/03/2021 4:35 am
Hillinator
(@hillinator)
New Member
RE: Upgraded extruder assembly to a 2.5S But with MK2 BED

I don’t know if anyone still cares about this topic, but last night I successfully modified the mk2.5S firmware to work with the mk42 bed! I can post a compiled .hex file if anyone cares! I might just make a new forum post and link all of the mk2.5/S .hex files depending on your setup.  

Posted : 12/03/2021 9:24 pm
Chicago Keri
(@chicago-keri)
Trusted Member
RE: Upgraded extruder assembly to a 2.5S But with MK2 BED

@hillinator

Cool! I did this awhile ago before upgrading to MK 2.5.  As I recall, the MK 2.5 PINDA mount is in a slightly different X-Y location than the 2S , so it failed the XYZ setup. What I did was to alter the frame geometry a little so that the PINDA could find the sense points.  This method reduces the available build volume a little bit, so the firmware fix is probably better.

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Posted : 13/03/2021 3:49 am
Jared
(@jared-2)
New Member
RE: Upgraded extruder assembly to a 2.5S But with MK2 BED

@hillinator

Can you advise what changes were necessary to make the mk2.5 firmware work with an mk42 heatbed?

Posted : 24/11/2021 8:44 pm
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