Chhogori (K2) - Summit Edition - Release 1 - Beta 1

Changes from Alpha 3:

• Add Ascender Variant Top Plate for XY Carriage
• Fix issue where Full X travel could not be met, close to X0
• Drop NEMA23 support, internal testing has deemed it to be extremely overkill
• Add Stiffening Rods to the Top Plates on the XY Carriage, reduces tool wobble
• Add laser cut side, top and bottom plates (optional, recommended for aluminum)
• Revise the Z endstop, brush is now height adjustable
• Drop Duet3 Support, RRF3 is not stable enough as of current to recommend
• Add example configs from prototype unit for SKR1.3 and Fysetc S6 controllers
• Add experimental 16t XY drive/idler pulley support

Chhogori (K2) - Summit Edition - Release 1 - Alpha 3

Changes from Alpha 2

• refactor XY towers to strengthen, reduce material usage, use less lengths of fasteners, and allow easier servicing of idlers and motors.
• refactor Z towers to allow easier replacement of Z motors and strengthen overall assembly
• solidify XY tensioner/rail mount top cap, add washers to reduce chance of plastic deformation and creep
• refactor XY rail holder, tighten tolerances and add stress relief features
• refactor XY carriage: lighten by 100g, deck plate per extruder option, alter part cooling ducts for 10% more performance (per FEA) allowing better PLA cooling support
• temporarily remove support for ascender, it will return with further testing
• move power inlet and switch closer to corner of power box
• shorten grommet stickout into chamber, easier to route wiring
• probe dock height is now adjustable
• Duet3 is no longer supported, the software is too broken to recommend support at this time
• Z ballscrew/rail blocks now use through bolts instead of heat set inserts, stronger per FEA by 8%
• add WAGO mounting brackets for 24VDC and 120VAC into electrical box
• bed frame refactored, greatly increasing frame stiffness by ~340% per FEA when tested for torsional rigidity
• minor adjustments to all heat stake holes, should reduce oozing of plastic on install

This will be the last alpha release, all future release 1 releases will be betas.

Chhogori (K2) - Summit Edition - Release 1 - Alpha 2

Changes from Alpha 1

• add emergency stop bed/gantry over travel stops under bed
• add Slice Engineering Mosquito Support
• add TL Dragon Support
• Hotend bolts in from bottom instead of top, removal of extruder no longer required
• add Magnetic Coupled Z Probe with Dock
• add hinges for front panel
• unify bed design with K2
• add thru bolts to XYZ towers to strengthen parts
• modify xy tool top plate to allow more clearance around fans when ascender is installed
• update pin definitions in config to be correct for SKR1.3
• add chamber based spool holder and filament out switches

Chhogori (K2) - Summit Edition - Release 1 - Alpha 1

Chhogori (K2) Printer

Chhogori (K2) is a Medium Format, Direct Drive, Fully Enclosed FDM Printer.

This is an entirely scratch design, based on the efforts of the "Hypercube Overkill Project" for the XY Motion System

Our discord server can be found here: https://discord.gg/MzTR3zE

BOM/Sourcing Guide for a 250x250x250 Build can be found here: https://docs.google.com/spreadsheets/d/1O3eyVuQ6M4F03MJSDs4Z71_XyNjXL5HFTZr1jsaAtRc/edit?usp=sharing

Frame Calculator: https://docs.google.com/spreadsheets/d/1hEwPB6xaeSEoHs37LAolL1LlHkrrIWt3NFW9NkrmP7g/edit?usp=sharing

This project is still in flux, things may change, the goals of this project are as follows:

• Fully Enclosed Design
• 2020, 2040, and 2060 Frame Members
• Insulated Build Chamber (Not Heated)
• Build Volumes of ~200^3 to 400^3 (use of whole plate available) + additional area to purge and wipe
• Direct Drive Extruder
• Shortest Belt Paths Possible, 4 Motors, 2 Per X, 2 Per Y Axis
• Moving Bed, Fixed Gantry
• MGN9 Rails (Z Axis)
• MGN9 and MGN12 Rails (X, Y)
• 9mm Belts on XY, 1204 Ballscrews on Z to lift the Bed
• Heavy Duty Bearings
• LDO Stepper Motors (Optional but Recommended)
• Minimal Printed Parts (ABS Required, Filled Nylon Recommended)
• 32 bit controller standard (Dual SKRs), Others Optional
• 24V Power Standard
• AC Heated Bed, 12mm MIC6 Plate with Magnetic Build Surface