Usually you use CAM software to plan tool motions from a CAD model. This is then post processed into a G-code specific for the controller of the actual CNC machine you are using
- Roland post processor for the mill at Trolllabs, and Mach3 postprocessor for the machine upstairs.
- The "underplate" is a sacrifice board, and it is there to save the bed of the machine when you need to cut through things, and usually you need to.
- Vacuum is nice for clamping of plates, but screws can be as good an options many times.
- Reference point can be anywhere - the important thing is to give the machine the same reference as all G-code from the CAD / CAM model refer to.
I 'd suggest that those who are interested in learing cnc milling having a look at "this old tonys" videos on the topic. Or actually, even if you are not interested you should have a look. He makes some good and inspiring content.. :-)
https://youtu.be/YBGqknN3gGs
Workflow list(figure out your own):
Use underplate if you will cut through
Add rubber band to size area under work piece (found in the drawer inside the white table next to the mill)
Put the vacuum on (switch at the wall, next to the computer)
Use these switches to set the right vacuum area on:
Change the tool with these tools (Don't use too much not too little force):
Drive the machine to the zero xy - set machine to zero xy.
Set the z zero to the same as bottom plate zero.
Use this panel on computer:
Load your cam files. (G-code) - generic mach3mill post processor
Put the suction on (next to the vacuum switch, next to the computer).
Set the feed rate a bit less for the first run
Press the cycle start green button. You can also every time stop the job with hold, and continue with green.
Enjoy summer.
Extra reference to zero when doing multiple jobs (forget it if you don't catch it from here; (or ask Jørgen/Heikki)):
