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Bear Upgrade 2.1.0-alpha0
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@gregsaun gregsaun released this 20 Aug 10:53
· 282 commits to master since this release
2.1.0-alpha0
7ae5576

What’s new?

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

  • New belt tensioner.
  • New stiffer Y motor mount.
  • New belt holder with clamping system.
  • Easier assembly of Y motor mount.
  • Creates a similar Y axis construction across all Bear frames.
  • T-nuts are placed were it is easy to swap them.
  • Compatible with E3D-Gates idlers.
  • Compatible with Bear Upgrade MK2S and MK2.5 frame (see optional part).
  • Helps to reduce Y axis stepper noise for MK3(S).
  • Increase homing accuracy of MK3(S).
  • Y bearing holders are now as standard (not an optional part any more).

⚠️ 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.

Compatibility

💡 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.

💡 You do not need to upgrade the Bear frame if you come from Full Bear Upgrade 2.0 MK3 frame.

⚠️ 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.

What hardware is needed?

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.

  • 1x M5x16 screw (button head ISO 7380)
  • 1x M5x10 screw (button head ISO 7380 or Openbuilds low profile)
  • 1x M3x30 screw (socket head ISO 4762)
  • 7x M3x25 screw (socket head ISO 4762)
  • 4x M3x18 screw (socket head ISO 4762)
  • 1x M3 square nut (DIN 562)
  • 1x M3 hex nylock nut (DIN 985)
  • 1x M3 washer (DIN 125), 0.5mm thick
  • 1x Dowel pin, 2.95mm diameter, 15.8mm long (same as Bear X axis)
  • 1x M5 t-nuts

Check assembly guide of our manual to see where this hardware is used.

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