Wood-D
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Release status: experimental
| Description | Just another wooden 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 |
Description
Wood-D - Just another wooden 3D-Delta-Printer (Open Source Project)
Wood-D is a 3D-Delta-Printer based on LASER-cut plywood or MDF. The joints are made of bearing balls and neodym ring magnets.
See also sub-project Wood-D Extruder Drive.
Design Objectives
Features
Based on the LASER cut constructive parts you get a very high precision (nearly) without measuring or adjusting.
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. The box design guarantees also a high angle precision.
Linear system rods are pressed in and the linear bearing are hold by a 2-componentt glue (epoxy).
Magnetic joints simplified the construction by giving a very high precision, less friction and zero backlash.
All non-plywood parts are standard industrial parts you can buy in online shops and eBay. (only drive shafts have to be sawed)
Necessary tools: LASER cutter (visit a FabLab/Hackerspace in your area), hand saw for metal, screw drivers, inbus keys, gripper, cutter, soldering iron
Specifications
| Principle | Delta / Rostock | |
| Construction | LASER cut 4mm plywood or MDF (5 pieces a 400 x 300 mm) | |
| Printing area | Rectangle 200 x 175 mm or Circle 240 mm diameter |
See next chapter |
| Printing height | 225 mm (Beta 1) 280 mm (Beta 2) |
(Beta 1: at a linear system length of 650 mm) (Beta 2: at a linear system length of 700 mm) about linear system length minus 425 mm |
| Dimension base box | 337 x 296 x 60 mm | |
| Dimension top box | 337 x 296 x 20 mm | |
| Dimension printer | 337 x 296 x 750 mm | depends on linear system length |
| Joints | Magnetic (neodym ring magnets with bearing balls) | |
| Drive | Stepper motors with timing belt GT2 or T2.5 |
Printing Area
Against to a cartesian printer with a fixed area you can decide witch ugly compromise you will choose. The different areas affects only settings in firmware and software - no hardware change. The reachable area is an intersection of circles and cut-offs by mechanical limits. Maybe future CAM software can handle this reaching area as printing area.
| Geometry | Size | X min | X max | Y min | Y max | Y Offset | PCB Heat Bed | Centered to |
|---|---|---|---|---|---|---|---|---|
| Circle | Dia. 240 mm | -120 | 120 | -120 | 120 | 0 | Outside | System |
| Circle | Dia. 210 mm | -105 | 105 | -90 | 120 | 15 | Inside | PCB HeatBed |
| Square | 186 x 186 mm | -93 | 93 | -87 | 108 | 15 | Inside | PCB HeatBed |
| Rectange | 200 x 175 mm | -100 | 100 | -66 | 109 | 21.5 | Inside | - |
| Rectange | 240 x 110 mm | -120 | 120 | -30 | 80 | 25 | Outside | - |
| Rectange | 255 x 85 mm | -127.5 | 127.5 | -17.5 | 67.5 | 25 | Outside | - |
| Rectange | 260 x 75 mm | -130 | 130 | -12.5 | 62.5 | 25 | Outside | - |
| Rectange | 280 x 42 mm | -140 | 140 | -1 | 41 | 20 | Outside | - |
Parts
Base and Top Box
The base and top boxes are made of LASER cut plywood and 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 holders, fittings, slots… are part of the LASER cut design.
Linear System
Beta 1: Standard industrial linear system with a 8 mm drive shafts and linear bearings LM8UU
Beta 2: Standard industrial linear system with a 12 mm drive shafts and linear bearings LM12LUU
The printing height depends on the length of the shafts. 100 mm more shaft gives 100 mm more printing room but also more instability.
Timing Belt and Pulleys
Standard industrial timing belt type GT2 with a 20 tooth pulley OR type T2.5 with a 16 tooth pulley
Joints
Magnetic joints made by neodym ring magnets (10 x 6 x 3 mm) with bearing balls (12 mm).
Beta 1: The balls are glued to the lift and carriage. The magnets are part of the rods.
Beta 2: The magnets are pressed in and glued to the lift and carriage. The balls are part of the rods.
See also article Magnet joint
Extruder Nozzle
A standard J Head Nozzle is used. See also RepRap Interface Standard RIS 1 for nozzle holder.
Bowden Extruder Drive
The extruder drive case is also LASER cut and is related to the Wade's Geared Extruder.
The details are described in the separate article Wood-D Extruder Drive.
Heated Bed
The base box is designed to hold a standard square PCB Heatbed (active area 190x190mm). Alternatively a disk with a diameter up to 300mm can be used (active area diameter 220mm).
The square heated bed is shifted 15 mm in +Y direction to reach the corners and get a bigger print area.
Three long holes are available for own disk bed design.
Electronics
Any electronics compliant with RepRap Interface Standard RIS 1. See List of electronics
Used in Beta 1: Arduino Mega 2560 with RAMPS 1.4 shield and Marlin firmware
The electronic is mounted on a 'drawer' to easily adapt to any other electronics.
The base box gives enough room for hide the board and all cables. For the wiring to the top box two aluminum tubes holds the cables.
Bill of Materials
>>> PRELIMINARY<<<
- # Parts
- 5 4 mm plywood or MDF with 400 x 300 mm
- 3 Steel shaft 12 mm with length 700 mm (grounded surface and hardened)
- 6 Long linear bearing for 12 mm LM12LUU
- 2 Aluminum tube 16 mm with length 640 mm
- 6 Ball Bearing with flange F605ZZ
- 3 Steel shaft 5 mm with length 34 mm
- 3 Timing belt GT2 or T2.5 with length about 2 m
- 6 Pulley for GT2 (20 teeth) or T2.5 (16 teeth)
- 3 NEMA 17 Stepper Motor
- 12 Screws M3 x 8
- 12 Washer M3
- 12 Bearing balls 12 mm
- 12 Neodym ring magnets 10 x 6 x 3 mm
- 1 PCB Heated bed
- ? Screws and springs for heated bed
- 1 Thermistor
- 3 End switch
- ? Screws and springs for end switch
- 1 Controller unit with stepper driver (Arduino+RAMPS, Gen7, Megatronics, Sanguinololu…)
- 1..2 Fan 40 mm
- 1 Power supply
- 1 Power switch
- 1 Extruder HotEnd (J-Head-nozzle)
- 1 Extruder drive (Wood-D Extruder Drive)
- 1 PTFE (Teflon™) 4/2 mm tube lenth about 1 m
- ...to be completed…
- Casein Glue
- 2 Component Glue (Epoxy)
Downloads
After finishing the first beta phase the construction drawings and LASER cut files will go online. Please wait...
Design and LASER cut files at GitHub repository github.com/jkDesignDE/Wood-D
Current Status
Beta 1:
| Part | Status | Comment |
|---|---|---|
| Dimensions Drawing | ready | at GitHub repository github.com/jkDesignDE/Wood-D |
| Excel Movement and Joints Calculation | ready | |
| Base and top box | ready | minor bugs to fix --> Beta 2 |
| Linear system | ready and working | |
| Lift and Joints | ready and working | Improvements in Beta 2 |
| Timing belt | ready and working | |
| Electronics | at work... | |
| Power supply | at work... | |
| Heated Bed | near ready | |
| Extruder Drive | ready |
Beta 2:
| Part | Status | Comment |
|---|---|---|
| Dimensions Drawing | ready | at GitHub repository github.com/jkDesignDE/Wood-D |
| Excel Movement and Joints Calculation | ready | at GitHub repository github.com/jkDesignDE/Wood-D |
| Base and top box | redesign at work | |
| Lift and Joints | redesign at work |
Links
More infos about the project on the blog page wood-d.de (German language)
