Wood-D Extruder Drive
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Release status: working
Description | Just another wooden bowden extruder for 3D-Delta-Printer (Open Source Project)
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License | GPL v3
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Author | |
Contributors | |
Based-on | [[]]
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Categories | |
CAD Models | CorelDraw / PDF
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External Link |
Contents
Description
Wood-D - Just another wooden 3D-Delta-Printer (Open Source Project)
Wood-D Extruder Drive is a simple bowden extruder based on LASER-cutted plywood or MDF or acrylic for 1.75 mm filament.
Design Objectives
Specifications
Principle | Bowden extruder like Wade's Geared Extruder | |
Construction | LASER cut 4mm plywood or MDF (1 piece 102 x 295 mm) | (also acrylic can be used) |
Drive | Gear driven hobbed bolt with NEMA 17 stepper motor | |
Filament | for 1.75 mm | (Little redesign for 3 mm) |
Dimension | 100 x 60 x 32(+Gears) mm |
Features
Based on the LASER cut constructive parts you get a very high precision at easy assembling.
The plywood parts/puzzle are hold together with key and slots and a little bit of glue. Through the box design with cross bracing the stiffness is very high.
All non-plywood parts are standard industrial parts you can be bought from online shops or eBay.
Easy assembling - only drive shafts and threaded rods have to be sawed.
Necessary tools: LASER cutter (visit a FabLab/Hackerspace in your area), hand saw for metal, screw drivers, gripper, cutter, soldering iron
Parts
Case
LASER cut 4 mm plywood or MDF or acrylic
Drive
Hobbed bolt M8 x 60 (as in Wade's Geared Extruder) OR a hobbed shaft with M8 on both ends.
Meantime you get industrial made shafts of hardened steel.
Gears
Standard industrial gears 72+24 module 0.8 OR RepRap printed gears from Wade's Geared Extruder
Note: The 72 tooth industrial gear has to be widened to 8 mm or M8
Note: The different gears needs different settings in firmware (industrial: 72/24; RepRap: 39/11)
Motor
NEMA 17 stepper motor as usual in RepRap projects
Bill of Materials
Quantity | Description | Type | Comments | Diagram |
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1 | 4 mm plywood or MDF or acrylic with min. 102 x 295 mm | LASER | ||
1 | Hobbed bolt M8 x 60 (as in Wade's Geared Extruder) | Shop | ||
? | Washer M8 | Hardware | to center the hobbed position | |
1 | Plastic gear 72 tooth module 0.8 (has to be widened to 8 mm or M8) | Shop | ||
(1) | Alternative: RepRap big gear 39 tooth from Wade's Geared Extruder | RP | ||
1 | Plastic gear 24 tooth module 0.8 | Shop | ||
(1) | Alternative: RepRap small gear 11 tooth from Wade's Geared Extruder | RP | ||
2 | Ball bearing with flange F608ZZ | Shop | ||
1 | Ball bearing 605ZZ | Shop | ||
1 | Steel shaft 5 mm with length 34 mm | Shop | recommended: shaft with ground surface | |
1 | Steel shaft 5 mm with length 17 mm | Shop | recommended: shaft with ground surface | |
2 | Pneumatic bulkhead connector/fitting for 4 mm tube | Shop | ||
1 | PTFE (Teflon™) 4/2 mm tube with length about 2x 30 mm | Shop | same as to hot end | |
2 | Threaded rod M4 with length about 100 mm | Hardware | length depends on spring | |
4 | Nut M4 | Hardware | ||
4 | Screw M3 x 8 | Hardware | ||
4 | Washer M3 | Hardware | ||
2 | Wing nut M4 | Hardware | ||
(2) | Alternative: knurled nut M4 | Hardware | ||
(2) | Alternative: nut M4 glued in wooden star knob | LASER | wooden parts for star knob are in new LASER cut files | |
2 | Spring 7 x 5.4 X 35 (or similar) | Hardware | nearly any spring with an inner diameter greater than 4 mm | |
1 | NEMA 17 stepper motor | Shop | ||
Casein glue | for wooden parts | |||
2 Component glue (Epoxy) | for nuts on the threaded rods and the gear on the stepper motor |
Downloads
Design and LASER cut files at GitHub repository github.com/jkDesignDE/Wood-D
Tutorial
Assembling tutorial as image sequence at wood-d.de/tutorial-wood-d-extruder-drive
Links
More infos about the Wood-D project on the blog page wood-d.de (German language)