This page serves as a reference to all users of the ShopBot CNC Router at Solid State Depot. This page is currently maintained by Marshall Poland; suggestions welcome!
What can you make on a CNC router?
(todo)
Getting Trained & Certified
The CNC router has a longer learning curve than some other equipment, but it’s well worth the effort!
We require users get trained and signed-off before using the CNC router. This is for safety as well as reducing damage to the machine. We understand you may show up having extensive CNC experience already, but we require this training to ensure you understand SSD policies the quirks of our machine.
Here are the steps to take in order to use the ShopBot on your own:
- Learn how to make a 3D design. You’ll need to model whatever you want to make using a design software (CAD). Fusion 360 would be the most straightforward software to use, but many SSD members prefer OnShape. Check out this intro to CAD with OnShape video posted by one of our members.
- Create toolpaths to cut your design. Import your design file into a CAM (Computer Aided Manufacturing) software. Use CAM to design toolpaths: precise instructions for every move the machine will make to cut your project. Export a G-code file. We strongly recommend Fusion 360 for this step. We’ve developed a custom Fusion post-processor file which tweaks the g-code to work with our machine. Put your g-code file on a USB thumb drive.
- Take the ShopBot training class. All classes are posted on Meetup and the SSD calendar. The class is a live demo where you’re walked through every step of safely running the machine. If you don’t see any classes on the schedule, post in the #cnc-router channel on Slack expressing interest. Please be patient, as all classes are taught by unpaid volunteers.
- Get certified. Arrange to meet with one of the instructors for a sign-off session. You’ll demonstrate that you can operate the machine safely and responsibly by making a couple practice cuts. You’ll receive a login to the ShopBot Linux machine at the end of this session, and can use it anytime.
- Reserve the ShopBot. Use the Reserve Equipment page to block off your session.
- Make your thing! Use the ShopBot’s control software – LinuxCNC – to import your G-code file from your thumb drive and run it. Be safe, remember your training, and clean up after yourself.
Machine Specs
- Brand: ShopBot
- Bed size: fits a 4 x 8 foot sheet of material.
- Max spindle speed: 18,000 RPM
- Spindle power: (todo)
- Max speed: Around 700 inches per minute
Cutting Tools
We aim to keep a basic stock of cutters and collets available for general use. Please take good care of these shared tools and follow SSD protocol of replacing anything you break.
- Collets: 1/8″, 1/4″ and 1/2″
- 1/4″ flat spiral upcut
- 1/4″ ballnose spiral upcut
- 1/8″ flat spiral upcut
- 1/4″ flat spiral compression
- 1/8″ 3/16″ 1/4″ 1/2″ flat straight cut
- 2″ surfacing straight cut
- 1/4″ 60 degree v/engraving bit (damaged, will replace)
Helpful Resources
- Learning CAD (Computer Aided Design; making 3D designs)
- Learning machining basics
- Learning CAM (Computer Aided Manufacturing; designing toolpaths)
- Slide deck: G-code
- G-code quick reference
- Intro to CAM w/ Fusion360 YouTube video
- SSD ShopBot custom Fusion post-processor (use this when posting from Fusion to automatically prep file so it plays well with our ShopBot)
- Demo CAM file: Colorado flag in Fusion 360. Open in Fusion 360 >> Manufacture mode to see the toolpaths. The G-code assumes you’re using a 1/8″ diameter, 2-flute end mill / router bit, for a .005″ chip load (good starting point for plywood & soft wood).
- Operating SSD’s ShopBot
- SSD machine reservation page (always reserve the ShopBot in advance if possible)
- Slide deck: ShopBot basic operation & safety (Marshall’s version)
- Slide deck: ShopBot basic operation & safety (Carter’s version, maybe the same? todo: merge)
FAQ
If your question isn’t answered below, post it in the #cnc-router channel on Slack.
What feeds and speeds should I use to cut plywood or MDF?
(todo)
What is a good source for high quality plywood (Baltic Birch) near Boulder?
Consolidated Hardwoods in Broomfield has the good stuff. Like 13 plies in a 3/4″ piece.