02 november 2010
3D Scanner POC
Proof of concept, inspired by S. Baker's excellent simple 3D scanner article.
Hardware
- turntable (geared stepper)
- videocamera (keycam)
- laserpointer and glass rod
Software
- ImageMagick (ffmpeg etc.)
- c-scan
- scan-extract
- MakerScanner (cyclops?)
- Blender
- MeshLab
Workflow
- scan movie
- convert to individual frames
- derive point cloud with scan_extract
- create surface with Blender
- check mesh with MeshLab
- create g-code with Skeinforge
- final 3D Print result
Geplaatst op 02 november 2010 11:05 | Comments (0)
11 februari 2010
Finite Element Modeling
My first, modest, steps in modeling the heaterbarrel of my RepRap 3D Printer. Starting with a 2D model. Not taking into account real-life stuff such as convection, radiation and other effects (I am probably not even aware of :-)
First tried to get ElmerFEM to compile on Intel Mac to find out it crashed anyway. Then recently I found FreeFEM++ which is perfectly suited for this purpose.
Before I can add some more sensible comments to this post I have to re-read some old math and physics textbooks first. Partial differential equations, thermal diffusivitiy. All this may take some time ;-)
Todays' update; 3D image (FreeFEM3D icw medit) of the heaterbarrel and NiCr Heater coil model. Now reading my way through the "Finite Element Method" by Michael R.Gosz, ISBN 0-8493-3407-1. An excellent introduction on FEM.
Geplaatst op 11 februari 2010 18:59 | Comments (0)
25 september 2009
Draaibank
Voor het ontwikkelwerk aan de RepRap printerkop een draaibankje gekocht bij VDH in Utrecht.
Wat handige links:
- Draaisnelheid berekenen
- Metrische schroefdraad afmetingen volgens ISO
- Mini lathe tuning
- Grinding your own lathe tools
- Tool bits
- ISO Passingstelsel
Geplaatst op 25 september 2009 04:45
02 augustus 2009
Nanotec stepperdriver breakout
Now working on a small breakout board for the Nanotec microsteppercontroller. To be used in the RepRap 3D Printer.
For those interested, you can download the Eagle files (.zip 291 KB) The parts-list you can find on Thingiverse.
For the stripboard version: if you don't use stripboard, remove the holes and move all top tracks cq wires to the bottom layer, or ripup and autoroute all over again.
Geplaatst op 02 augustus 2009 19:26 | Comments (0)
02 december 2008
3D Printer
For the RepRap 3D printer ordered the generation 2 electronics at RRRF. The PWM and DC motor driver kits are sold out :-( The Cartesian (Silver) kit at Bits From Bytes.
Products
- 1 x GM3 Noise Suppressor v1.0 Kit = $3.00
- 10 x Cat 5e Cable = $2.50
- 1 x 100K Thermistor = $1.50
- 1 x ABS Coil (5lb) = $45.50
- 1 x HDPE (5lbs) = $30.00
- 1 x Magnetic Rotary Encoder v1.0 Kit = $20.00
- 2 x Molex Y Connector = $4.00
- 1 x Nichrome Wire = $0.60
- 5 x Opto Endstop v2.1 Kit = $13.75
- 1 x Sanguino v1.0 Kit = $45.00
- Accessory 1 With USB to TTL cable
- 3 x Stepper Motor Driver v1.2 Kit = $75.00
- 1 x Thermocouple Sensor v1.0 Kit = $20.00
- 1 x PWM Driver v1.1 Raw PCB = $4.00
Geplaatst op 02 december 2008 19:16