Ful linear Grizzly Bear upgrade with 300x300x400mm print area.
Extrusions replacements/addons needed:
replace v_slot_top 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 stepper motors and lead screws with 500mm ones
add 2 x 500mm 2040 v-slot for bottom sides (Y rails 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
2 x HGW15CC blocks and 2 x HGR15RH x 500mm rails 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.
- CR10S Y carriage mounts directly on the HGH15CA flanged blocks (you have to drill the holes).
- 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 their 4 rows of balls and precision.
Having more balls and grease nipples, matter! :)
- On Y rails, you must use one side a a master reference, everything mounted pretty exact (using helpers) and align the other v_slot (not the rail) using this master reference.
- For the CR10S heated bed, I will use a 220V/700W heatmat from Keenovo, driven with a SSR.
- 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.
In the Fusion 360 file, there are 3 options for the X axis and 2 options for Y motor:
- Option 1: X/Y with Nema17, reusing everything you have
- Option 2: X/Y with Nema23 (why not?) to overcome the eternal lack of torque of Nema17 and for mini-CNC/laser engraving use.
In the near future, I will use a magnetic Railcore II heated bed from www.713maker.com and with 6 mm thickness and the extra mass, those poor Nema17 will be at their limit :)
I like having options and double/triple redundancy
- Option 3: CR-10 X-carriage on v-slot with printed adapter for the original Bear Extruder
I forgot to mention, the X-carriage is for the original Bear Extruder and/or the new Bondtech.
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 the Fusion File for the modded parts. The models come from a different system and have no history or sketches :(
And yes, this is my first time dipping my fingers in Fusion 360 and Im' still on the learning curve.
After a couple of failed prints, added a breakable wall to X-idler as support.
S3D or Slic3r suck on generating a proper support on that specific area.
Update 08.03.19: updated mounting holes for cr-10_mk3-carriage-adapter.stl
- add the classic Prusa style Bear rods, holders and so on, in case you ever want to go back to close to "stock"