Step 20: First Machinings

posted in: Construction CNC DIY | 0
This is going to be my first 3D model to be machining at all, without more tests. It’s a model of a ship I was working on, at least only one half (it’s symmetric). I’ve cleaned the surface, converted to a simply solid, and re-scaled to a properly size to be machined in my CNC
First, I apply a roughing operation, with a Ø10mm tool. 3mm depth and a feedrate of 800mm/min. With my experience, for this material (Ureol) and this tool, this parameters are correct. The tool will machine 60% of his diameter, and left an offset of 2mm of the final surface
After this, I’ve planned a contour step in two steps, to define the perimeter of the volume. THe machining conditions are similar to the last step
Now I’ve planned the finish paths. With a spheric tool, i will finish the surface in two steps 1mm each one. Catia will program the zig-zag movement, but I’ve decided that every movement is 1.5mm distance from the other. Logically, the most close this distance, the most defined is the final surface, but of course, will take much time. With all this, and since it’s only a test, I will not use too much time in the finish step, nevertheless the total machining time is 40 minutes.
CATIA realize a machining simulation showing the final surface as it will looks after the machining. This is the final quality
It’s pretty good. Of course, I can sand it manually after, so the finish aspect will be perfect. Here you have a video of how CATIA does this simulation. It’s interesting and usefull this simulation, because you can see if any operation will not finish correctly, or there are any intersection with the tool and the stock.