So a while back I was all like "I'mma mill me some nyancat for my 2.008 paperweight." (http://orangenarwhals.blogspot.com/2011/09/nyancad-correct-motivation-for-learning.html)
Oh yea, my partner for this lab is the awesome Cappie Pomeroy. He did all the lathe work o.o so don't ask me about that.
So I got around to milling it.
|look, nyancat got fatter so that you can fit a 1/16'' end mill between it's crevices!|
However, my resizing and retracing ended up not mattering, since I decided to engrave it. This was because we had to make a 15 minute version, and no matter how I tweaked Mastercam (using 0.02'' depth instead of 0.1'', using a wide endmill to clear it and then remachining with the 1/16''), there was no way the full 3D paperweight was milling out in 15 minutes.
|Yea so there are really dumb ways to make a path in Mastercam.|
See the X'd out paths to the left -- I was tracing all the paths by hand, essentially. Then Pat, the shop instructor, came by and showed me the magic of the the "polygon" tool which will automatically apply a function (in this case, engraving) to everything within that polgyon. It created some weird paths, like you get on a lasercutter which doesn't recognize your vector as one shape but as individual lines*, but it gets the job done. In other words, he finished in 10 minutes what was taking me hours to do... hah.
*aka it doesn't trace them continuously but rather jumps back and forth between different lines in the drawing
See link below for g-code / mastercam / solidworks files.
The jig was made by the instructors for the class, along with the "offset" used in Mastercam to make sure the blank is positioned correctly.
|gahhh technical difficulties. Yes, I used my phone to take a picture of picture on my camera. You really don't want to know.|
where "base/lab1" docs are for the CNC lathe and "engraving" docs are for the CNC mill.
Software used: solidworks (.sldprt, exported to .dwg), mastercam
Todo next: Mill out the actual thing.