Today I got to work on tapping and threading holes using the Haas minimill and Fusion360.
Unfortunately, I forgot to take pictures at work, so I recreated the drawing in Fusion to use as an example.
The CAM programming end of it was quite easy and only took a minute to setup. I first drilled out the hole using a pecking method (1/3" of the tool diameter) then came in with the tap to thread the hole. How the tapping works is by aligning the spindle rotation (in this case 500 RPM) with the vertical (z) motion of the machine, matching it perfectly to the thread pitch, when it reaches the bottom, it reverses the spindle and comes back out the same way it came in. It's pretty nerve-wracking because if there is any slight thing off, the tap could easily break.
I tried it first with a set of imperial threads, 1/4-20, 10-32, and 4-40, each of which worked fine, though I did snap one of the taps when cutting the 4-40 hole that was due to my random selection of a 4-50 tool in the program.
Interestingly, when I moved over to equivalent metric holes, 6-1m & 5-0.8m, it was extremely loose when tested with thread gauges. I have no idea why it does that, and nothing in the program is different except the tool size. My boss says he's had similar issues when using metric taps, and the only solution he found was to convert the metric taps to imperial manually, and it seems to work that way. He thinks its due to the conversion and some rounding down or up inside the machine.
I also got the day off on Friday which is why there wasn't any post then.