Difference between revisions of "Gantry CNC"
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There are a lot of different options for preparing a g-code file which can be loaded onto the CNC to cut a design. Some examples include; | There are a lot of different options for preparing a g-code file which can be loaded onto the CNC to cut a design. Some examples include; | ||
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| + | 3D Packages | ||
| + | * Autodesk Fusion 360 (Free for hobbyists and students, Windows / OSX) http://www.autodesk.co.uk/products/fusion-360/overview | ||
2D Packages | 2D Packages | ||
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* Cambam (LHS has a license, installed on the Robotics CAD/CAM laptop) http://www.cambam.info/ | * Cambam (LHS has a license, installed on the Robotics CAD/CAM laptop) http://www.cambam.info/ | ||
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When using Fusion 360, in order to post to the Hackspace CNC machines, the "Generic EMC2" post-processor should be selected when finally saving the g-code file. LinuxCNC recognises the "ngc" file extension although any extension can be used. | When using Fusion 360, in order to post to the Hackspace CNC machines, the "Generic EMC2" post-processor should be selected when finally saving the g-code file. LinuxCNC recognises the "ngc" file extension although any extension can be used. | ||
Revision as of 07:45, 5 May 2016
| Gantry CNC | |
|---|---|
 | |
| Model | LHS Design |
| Sub-category | CNC |
| Status | Under construction |
| Consumables | Router / Milling Cutters, material to cut |
| Accessories | NA |
| Training requirement | Yes |
| ACnode | Yes |
| Owner | LHS (spindle and VFD currently on loan) (Frame Dean) |
| Origin | LHS Built |
| Location | Basement, |
| Maintainers | CNC Team, Robotics, Metalbashers, |
Summary
This system can cut 2d and 3d shapes from materials such as wood, plastic, metal and composites. It is useful for cutting things that can't be cut in the laser cutter due to their thickness or material compatibility. The edge accuracy of parts is also usually better than a laser cut due to the lack of uncertainty about the kerf width, and improved vertical walls.
We made this CNC from the UCL donated linear slides and stages, and other things lying around the space, and some bits and pieces that members had. Any suggestions for improvements / modification are welcome.
Specs
- Spindle
- Perske VS50.09 (see http://crpperske.com/pdf/Perske_Catalog_25AM.pdf)
- 1750 to 17500rpm
- 2.2kW driven by Siemens Micromaster 420 VFD
- ER20 extension collet chuck fitted
- Rapid traverse rate at 100% 2000mm/min (currently derated to 1200mm/min Jan 2016)
- Axis travel
- X(cross) 850mm
- Y(longitudinal) 960mm
- Z(vertical) 80mm (Phase 1), 62mm clear of current spoilboard, 200mm (Phase 2)
Technical
The system currently runs LinuxCNC on the PC built into the base.
Using the system
- The spindle is currently fitted with an ER20 collet chuck and can take cutters up to 13mm diameter. Collets can be found on top of the Boxford CNC. Please use only spanners to change and do so with care and respect
- To start the spindle, press the green button on the VFD. Use the up and down keys to vary the speed.
Health and Saftey
- By using this machine you are self-certifying that you are competent to do so.
- You will not use this machine unless all safety features are in place and operational.
- You will not use this machine if you are under the influence of drugs ar alcohol. (this will result in a life time ban)
Generating g-code from your designs
There are a lot of different options for preparing a g-code file which can be loaded onto the CNC to cut a design. Some examples include;
3D Packages
- Autodesk Fusion 360 (Free for hobbyists and students, Windows / OSX) http://www.autodesk.co.uk/products/fusion-360/overview
2D Packages
- MakerCam (Free, runs in a browser via Flash) http://www.makercam.com/makercam.swf
- Cambam (LHS has a license, installed on the Robotics CAD/CAM laptop) http://www.cambam.info/
When using Fusion 360, in order to post to the Hackspace CNC machines, the "Generic EMC2" post-processor should be selected when finally saving the g-code file. LinuxCNC recognises the "ngc" file extension although any extension can be used.
System status
The system is up and running in 'alpha' status - it can be used for projects, although we are still doing some tidying and adjusting of subsystems based on initial experiences of people using it in the alpha/beta program. A low noise vacuum cleaner has been installed as a dust extraction system.
Use / Induction
Once you have been trained and done a number of jobs on the shapeoko, you can by arrangement with the maintainers schedule an induction.
You will need to have demonstrated your ability on CAD and CAM.
It is felt that you should have done 3 jobs or so on the entry level CNC machines which are the shapeoko or Boxford and be a member of the community