Does anyone tried to use MK3 x-ends (version R2) on MK2(s) /MK2.5? I know the end stop holes on x-end-motor are missing but I have put them back (STL file attached) (I used Fusion 360 for now, but tomorrow will redo it using openscad).

I have done some measurements on x-end-motor, x-end-idler and x-carriage and nothing seems to be a problem to my eyes. Did I miss something?

I have just finished to print MK2.5 parts and have to update bearings and rods, the perfect moment to print new x-ends!

 

Just to tell you that MK3 style X ends works perfectly on my MK2.5. I could not resist to add some improvements on the x-ends (on Fusion 360). I will publish this soon

 

that could be awsome yes, thank you. Does it works with 12v PSU?

 

Yes you are right, this will be too complicated, I will wait for the MK3s

Maybe someone else is interested

 

I understand, thanks for proposing . Keep us in touch with this, still interested to see how it goes!

 

I could add this to the optional parts, why not. I would like to put priority on some other designs for now (for this printer and foe other things). But if the requests for this increase then I will give a try

 

I finished to mount the MK2.5 during the week-end and on the side of the Bear Upgrade everything was fine. However, I am having a weird issue where the extruder is skipping steps on the first purge line. I have asked on Prusa forum :
Extruder is skipping steps on purge line

If some of you have ideas let me know!

 

I tried to tight them less and more but got the same results

I have disassembled the extruder and I found that the top PTFE tube was a slightly squished by a piece of plastic. I have cleaned the PTFE tube hole and double check the hole between PTFE and Bondtech pulley. Unfortunately this does not change anything.

I removed the genuine E3D silicon cover, same result.

Something else I could observed is that my bed seems to be badly leveled (front the front, on the left side the level is bigger than on the right side) and I could not correct it with the bed level correction menu... Firmware is still RC1 so maybe there are issue with the functionality.

I am currently printing a Benchy to see if it is only a problem with the first layer / first purge line.

Then I will take the road of the filament/low temp issue

 

For the distance ring, are speaking about the standoffs? Yes they are already mounted on the bed.

Here is what you get with MK2.5 upgrade :

 

Interesting issue on the new Bondtech extruder :
Filament path is not straight through Bondtech wheels · Issue #51 · prusa3d/Original-Prusa-i3

 

Looks to be a sweet plan

Maybe you could ask if they can swap the 12v bed with the 24v. One of advantage of the 24v is that the bed is fixed on 9 points, and so more flat. But this means you will need the Y alu carriage from MK3... And 24v comes without the standoffs on it, you have to add 6x6 round M3 standoffs.

 

Finally! Extruder issue solved! That was mainly the nozzle, I swapped for a new one! \o/

I can work again on new parts / optional parts!

 

I have created the Facebook group here :
facebook.com/groups/PrusaBearUpgrade/

 

Do not forget that it was good until the MK3 went out

 

Thank you very much Michael, I appreciate. 3D printing is very useful to create lots and lots of tools and jigs (for CNC machine or not). Do not hesitate if you have few questions

 

I have done some update :
- New printed parts to cover top of the Z axis. This part has some space in case a t-nuts is a bit longer on top and it saves print time and material. Can be used with self tapping screws or standard low profile screws
- All BOM and manuals have been updated according to this new part
- I now recommend an orientation for zip ties on Full Upgrade (they might touch the heated bed sleeves with MK2.5 and MK3)
- Added zip ties reference to all BOM
- Added recommended spare parts to all BOM
- Added McMaster-Carr links for non-Openbuilds components