Linear Grizzly Bear I3 upgrade V2

Ful linear Grizzly Bear upgrade with 300x300x400mm print area.

Extrusions replacements/addons needed:

• replace v_slot_top with 1 x 390mm 2040 v-slot

• replace v_slot_vertical_sides with 550mm 2040 v-slot

• replace v_slot_front_rear with 470mm 2040 v-slot

• replace v_slot_bottoms with 500mm 2040 v-slot

• replace Z axis lead screws with 500mm ones

• add 1 x 500mm 2040 v-slot for bottom side (Y rail support)

• add 1 x 490mm 2020 v-slot (for X rail support)

• 1 x HGH15CA block and 1 x HGR15RH x 380mm rail on X

• 1 x HGW15CC block and 1 x HGR15RH x 500mm rail on Y

• 2 x MGN12H blocks and 2 x MGNR12R x 490mm rails on Z

• Instead of HGW15CA and HGW15CC you can use TRH15VN and TRH15FL from TBI Motion. I did, at half the price, for the same quality.

• For rails alignment, you must print and use the helpers.

• MGN12H is too floppy for my taste, I used it only on Z axis and cannot beat HGW15 with its 4 rows of balls and precision.
  Having more balls and grease nipples, matter! :)

• The whole frame is taller and wider than the original Bear, to accomodate various styles of extruders, but still use the whole printable bed area with space to spare for wire brush, external purge containers, etc.

• The X-carriage is for the Bear Extruder (last dev).

• Cable management for the X carriage is done with zip-ties, but it's up to you to come up with a better idea (and share it back).

• There is no History in some of the Fusion Files for some of the modded parts. Most of the models come from a different system and have no history or sketches.

This is the latest iteration with what I am currently using.

Update February 19 2020:

• Y idler tensioner from Prusa i3 Bear Upgrade 2.1 (dev branch), slightly remixed and beefed up for using 9mm belt and the so called "Gates toothed idler 20T for 9mm belt and 5mm bore"
  Original Gates being so expensive and hard to come by, the actual measurements are taken from drawings from Powge seller on Aliexpress. That's what i bought :)
• added a custom MGN12H Hemera X-carriage and mount asked by a user.

Update February 20 2020:

• 9mm Y belt holder to match the 9mm Y idler tensioner, also remixed from from Prusa i3 Bear Upgrade 2.1 (dev branch).
  Be advised, the mounting holes are centered with the belt, not offset like on the original Bear. This holder most probably won't work on a normal Prusa carriage, it will result in an off centered belt path, because the holes are to be manually drilled into the CR10 or custom Y carriage for the 300x300mm bed.
  I don't have a Prusa, so I cannot say.
  Anyway, Fusion 360 source is included, so you can customize it yourself if need be.

Update March 3 2020:

• switched everything to V2. Please download again.
• added Dragon Bowden mount (Bltouch and 12mm classic inductive probe).
• added 15mm Y rail stopper
• added optional X-end endstop support (for non Trinamic boards)
• modified X carriage (for Prusa's filament sensor), X motor and X idler for different styles of POM nuts.

Update March 14 2020:

• added optional Y-end endstop support (for non Trinamic boards)
• update fusion360_sources.zip

Update March 19 2020:

• added hemera_bltouch_MGN12H mount with 35mm offset. It definitely covers the entire 300mm printing area of this design.

Update March 25 2020:

• added Voron Afterburner x-carriage & mount for HGH15CA (this design only).
  See:
• https://github.com/VoronDesign/Voron-Afterburner
• http://vorondesign.com/voron_afterburner
• https://discord.gg/xgXWctB
• https://www.reddit.com/r/voroncorexy/

Credits go to Grégoire Saunier (pekcitron on Thingiverse), the creator of the Bear upgrade. Thanks, Greg!

If you like this project, a black coffee is welcomed :)