STORE – KOSSEL 3D PRINTER
 

 

 

 

HIGH QUALITY COMPONENTS AT AN INCREDIBLE PRICE


 

 

 Check out the new wiki for more info and build instructions!

WHAT SETS OUR PRINTER APART?

The FVM Kossel is a beefed up version of the standard Mini Kossel with many upgrades:
- 2020 aluminum extrusions – stronger and more rigid
- 220mm diameter borosilicate glass print bed – larger than the Mini Kossel’s 170mm
- effective print volume ~210mm diameter, ~220mm height (about 150% more volume than Mini Kossel)
- aluminum heated bed (heating coil circuit printed directly on 3mm aluminum plate)
- DRV8825 stepper motor drivers (1/32 step) – finer control and quieter in operation
- E3D metal print head (0.4mm nozzle, 1.75mm) with fan – able to print using PLA, ABS, HIPS, Nylon, Laywood, etcc.
- 12864 Full Graphics LCD Display – more info displayed
- original linear rails design retained (many suppliers substitute with rollers to reduce cost)
- Belt tension springs – keeps belts tight yet allows skipping when things go wrong

DESIGN GOALS

• Zero backlash.
• Type: Delta printer
• Speed: 320 mm/s in all 3 directions.
• Resolution: 160 steps/mm in all 3 directions.
• Repeatability: better than 0.03 mm (30 micron)
• Build volume: cylindrical, 220mm diameter, 220mm height.
• Footprint: triangle, 340 mm width, 380 mm across (300 mm 20 x 20 mm aluminum extrusion + printed corners).
• Frame height: 670 mm.
• Print surface: round glass, with aluminum heat plate underneath, doesn’t move.
• Mass of end effector with hotend: less than 50 grams.
• Metal hotend and heated bed to accommodate different filament materials; PLA, ABS, HIPS, nylon, Laywood, etc.
• Simplicity: fewer than 200 parts.
• Hardware cost: less than $530 CAD (comes without power supply).
• Fully automatic print surface level calibration (autoleveling).

BILL OF MATERIALS

Printed parts

• 1x hot end fan holder which also serves to attach the hotend.
• 1x end effector
• 1x extruder
• 1x retractable z probe
• 3x Bottom corners
• 3x Top corners
• 3x Self locking carriage
• 6x endstop holder & spacers
• 3x print surface holder & swivel tabs
• 1x reel holder

Frame

• 3x 670mm vertical 20mm x 20mm extrusion
• 9x 300mm horizontal 20mm x 20mm extrusion
• 1x 220mm round glass/borosilicate plate & fasteners
• 1x 220mm 3mm thick 85watt hotplate

Linear motion

• 3x 400mm hardened steel rail and carriages
• 3x 1380mm GT2 belt open loop with 2mm pitch and 6mm width
• flanged bearings F623ZZ 3x10x4mm
• 3x GT2 pulley with 20 teeth and 2mm pitch, ID=5mm
• 3x NEMA 17 Stepper motor 0.49Nm

Diagonal push rods

• 12x Traxxas rod ends
• 12x M4x20mm set screws
• 6x 261mm Carbon tube OD=6mm ID=4mm

Bowden

• 1x E3D all metal Hotend 0.4mm for 1.75mm filament
• 1x Clear PTFE tubing ID=2mm OD=4mm
• 2x Push fit connector ID=4mm with M5 thread (for 1.75mm filament)

Extruder

• 1x NEMA-17 stepper motor 0.49Nm
• 1x MK8 drive gear for extruder
• 1x 625ZZ ball bearing

Endstops

• 3x micro switch

Automatic bed leveling probe

• 1x micro switch
• 1x Alan key

Electronics

• 1 x Arduino Mega 2650
• 1 x RAMPS 1.4 shield
• 1 x 1 128×64 full graphics LCD display
• 4 x DRV8825 Stepper motor drivers (1/32 micro-stepping)
• 1x 40x40x10mm 12VDC Fan

Fasteners, wiring, springs, and all other minor components included.

Power supply not included.

Check out the new wiki for more info and build instructions!

Have questions? Send an email to info@fvmakers.com.