I'm running into a problem cutting aluminum when plunging (see video). The spindle is stalling momentarily and things...don't sound good. I'm using a 1/8" 2 flute Zrn coated end mill running at 9500rpm with the below settings.
Here's what happens...
I initially tried a 2 ipm plunge rate, then switched to a 1 inch plunge. I had the exact same problem both times. It seems like after the first few passes (in which a very slow 1 ipm plunge goes smoothly), the plunge rate is much faster than 1 ipm as you can see by just watching the video, so I'm just not sure if it's a problem with the g code or I'm doing something else wrong. Attached is the g code generated by Meshcam.
I'm a total newcomer at this, but looking through the g code I see multiple plunges like this:
Where it's plunging at the feed rate right up until the last .015mm or so. Most other plunges are much more tolerant and the plunge is changed from the feed rate at about 1 DOC or .254mm before.
Any help is much appreciated.
al6061-side-a-v2.nc (211.6 KB)