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Mini z axis extension  

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Dan
 Dan
(@dan-7)
Mini z axis extension

I am interested in extending the z access length of my prusa mini. The newest firmware has an experimental setting to do this and I see this company has created a kit although it is on backorder. 

https://grapid.com/produkt/original-grapid-z-axis-upgrade-for-the-prusa-mini-350mm/

Has anyone done this or does anyone know of a bom of the exact parts needed and where to source them?

Dan

Veröffentlicht : 25/10/2021 2:00 am
cwbullet
(@cwbullet)
Great idea

This has been done before but non the less is a good idea.  The Bear mod does this for the mini.  

--------------------
Chuck H
3D Printer Review Blog

Veröffentlicht : 26/10/2021 4:02 pm
Dan
 Dan
(@dan-7)
Themenstarter answered:
Mini z axis extension

I wasn't aware of The Bear mod. That is a pretty substantial rework. I wish the grapid project was still active. I received an email from the creator that it is no longer in development. I would like to duplicate the grapid approach as it looks like all it needs is a longer z extrusion, round rods and z axis motor with lead screw.

Can you confirm the spec for the prusa z axis lead screw or what might make a longer replacement for it.  The Extrusion seems to be 3030 but unsure of that as well. The round rods seem to be 10mm.

BTW, thanks for taking the time to reply!

Veröffentlicht : 26/10/2021 4:51 pm
Dan
 Dan
(@dan-7)
Themenstarter answered:
Z axis lead screw specs

Does anyone know where I can find the specs for the mini z axis lead screw? The one I bought to try my extension is not the same. Conversely is it possible to use the new screw and calibrate the z steps?

Veröffentlicht : 04/11/2021 10:56 pm
Urshurak776
(@urshurak776)
Trusted Member
RE: GITHUB

Check the GITHUB:

 

https://github.com/prusa3d/Original-Prusa-MINI/tree/master/BOM

 

Veröffentlicht : 05/11/2021 1:40 pm
Urshurak776
(@urshurak776)
Trusted Member
Z-Motor drawing

Specifically: https://github.com/prusa3d/Original-Prusa-MINI/blob/master/DOCUMENTATION/ELECTRONICS/mini-motor-kit.pdf

The specs for the threaded rod are on the z-motor drawing.

Veröffentlicht : 05/11/2021 1:49 pm
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