8. Computer controlled machining¶
Our group assignment for the week was to do our lab’s safety training about with test for runout, alignment, fixturing, speeds, feeds, materials, and toolpaths for the CNC machine
Zack Budzichowski: Designed and ran the CNC cut of the test patterns, analysis Dan Stone: Measured the cuts and compared to design, documentation Adam Durrett: Documentation and analysis
Safety Training¶
Tom Dubick gave a presentation on Aspire software and the workflow and safety for our ShopBot.
Dr Taylor gave his Foundation of CNC presentation to our lab.
We learned about the bits (flutes, upcut/downcut, shank diameters, length of cut, etc.) along with the feeds and speeds for the bits we have in our lab.
Testing the ShopBot¶
- We created an Aspire file to demonstrate the difference of the various toolpaths (inside, outside and on the line)
Cutting test¶
The following files show our test cut set up
The file had a number of shapes with planned sizes
Getting it into Aspire to create the tool path
Once tool path is read we can cut
And we have the cut ready to measure
Here we start to measure so we can compare
Here is the overall results
We had a hard time measuring as it was hard to be consistent with the caliper placement
After further review it looks like the calipers got rezeroed halfway through and so a more careful measurement yielded the following
As we can see the outside the line cut are right on the mark and on the line / inside the line are smaller by the size the of the bit…looks like our CNC is calibrated well