Stronger frame for Prusa i3 MK2(s), MK2.5 and MK3
This Bear Frame Upgrade 2.1 is compatible with the Full Bear Frame Upgrade 2.0 MK3 frame. If you do not know which frame you have please check our FAQ here. The 2.1 version needs extra hardware (screws, nuts, washers, dowel pin), check the bill of materials for more details. You can also order hardware upgrade kit from our distributor websites.
:bulb: If you have a Full Bear Frame Upgrade 2.0 MK2S or MK2.5 frame you can find compatible parts in the optional parts section below.
:warning: The new Y and Z axis are not compatible with any of the existing Prusa or Bear 2.0 parts. You have to update all parts from Bear 2.1.
:warning: The original Prusa firmware is compatible with the Bear Upgrade 2.1 only if you use the Original Prusa extruder and X axis. If you use the Bear upgrade 2.1 frame with BearExxa, BearMera or Bondtech extruders you will need to use custom firmware.
Check the assets at the end of the release note.
This Bear Frame Upgrade 2.1 is compatible with the Full Bear Frame Upgrade 2.0 MK3 frame. If you do not know which frame you have please check our FAQ here.
:bulb: If you have a Full Bear Frame Upgrade 2.0 MK2S or MK2.5 frame you can find compatible parts in the optional parts section.
:warning: The new Y and Z axis are not compatible with any of the existing Prusa or Bear 2.0 parts. You have to update all parts from Bear 2.1.
Reprint all parts and follow the assembly guide.
It is not necessary to update your printed parts but if you really want to get latest improvements you can reprint those:
Check the assets at the end of the release note.
Release to prepare the final release of Bear 2.1, test the automatic release creation and have download links for the printed parts working.
This release includes a new build helper for Y axis to help alignment of the left smooth rod with the frame. Build helper for Z axis has been redesigned to ease alignment.
Both build helpers have a special shape to avoid print artifacts like elephant foot, buldges, bad corners or uneven layers. This helps building your frame as square as possible even if your print isn’t perfect.
⚠️ Do not use the build helper for Y axis on both smooth rods. It is only designed to align left smooth rod and not to set the distance between the smooth rods.
This Bear Upgrade 2.1 is compatible with Full Bear Upgrade 2.0 MK3 frame. If you do not know which frame you have please check our FAQ here.
:bulb: If you have a Full Bear Upgrade 2.0 MK2S or MK2.5 frame you can find compatible parts here: optional_parts/bear_2.0_upgrade_mk2-2s-2.5-2.5s.
:warning: The new Y and Z axis are not compatible with any of the existing Prusa or Bear 2.0 parts. You have to update all parts from Bear 2.1.
Nothing needs to be reprinted except the Y belt holder for the shorter Bear 2.0 MK2(S)/MK2.5(S) frame.
Below the list is the hardware needed if you upgrade from Bear 2.0 to this new release. No changes are needed on the frame itself.
Check temporary assembly guide to known where this hardware is used.
This Bear Upgrade 2.1 is compatible with Full Bear Upgrade 2.0 MK3 frame. If you do not know which frame you have please check our FAQ here.
:bulb: If you have a Full Bear Upgrade 2.0 MK2S or MK2.5 frame you can find compatible parts here: optional_parts/bear_2.0_upgrade_mk2-2s-2.5-2.5s.
:warning: The new Y and Z axis are not compatible with any of the existing Prusa or Bear 2.0 parts. You have to update all parts from Bear 2.1.
Here are the parts you need to (re-)print from Bear 2.1.0-alpha1 release:
Below the list is the hardware needed if you upgrade from Bear 2.0 to this new release. No changes are needed on the frame itself.
Check temporary assembly guide to known where this hardware is used.
Vecko Kojchevski Z axis parts: thingiverse.com/vekoj/designs . Vecko also gave me great feedback on the Z motor mount that were useful. Thanks!
:warning: This a work in progress, the current kits sold by our official distributors are not containing the hardware necessary for this upgrade. The Bear Upgrade 2.1 is going to have new features that will require other modifications.
:bulb: You do not need to upgrade the Bear frame if you come from Full Bear Upgrade 2.0 MK3 frame.
:bulb: You do not need to upgrade the Bear frame if you come from Full Bear Upgrade 2.0 MK2S or MK2.5 frame to use Bear 2.1 releases. However you will need a special belt holder available in the optional parts.
:warning: The new Y axis is not compatible with any of the existing Prusa Y axis, you have to print all parts of this new Bear Y axis.
If you come from Bear 2.1.0-alpha0 or Bear 2.0 we recommend to replace all new parts that have been updated with this release and get the new hardware corresponding. It is a good time to cleanup and grease the Y bearings (or even replace them with new one). Here are the parts you need to re-print:
Below the list is the hardware needed if you upgrade from Bear 2.0 to this new release. No changes are needed on the frame itself.
Check temporary assembly guide to known where this hardware is used.
Bear Upgrade 2.1 will have a single frame for all Prusa versions (MK2S, MK2.5(S) and MK3(S)). This single frame is exactly the same frame than Full Bear 2.0 MK3 frame.
The new release also introduces a complete new Y axis with the following features
:warning: This a work in progress, the current kits sold by our official distributors are not containing the hardware necessary for this upgrade. The Bear Upgrade 2.1 is going to have new features that will require other modifications.
:bulb: You do not need to upgrade the Bear frame if you come from Full Bear Upgrade 2.0 MK2S or MK2.5 frame to use the new Y axis. It is compatible with Full Bear MK2S and MK2.5 frames thanks to a special belt holder available in the optional parts.
:bulb: You do not need to upgrade the Bear frame if you come from Full Bear Upgrade 2.0 MK3 frame.
:warning: The new Y axis is not compatible with any of the existing Prusa Y axis, you have to print all parts of this new Bear Y axis.
Below the list is the hardware needed if you upgrade from Bear 2.0 to this new release. No changes are needed on the frame itself.
Check assembly guide of our manual to see where this hardware is used.