That moment last Tuesday when I realized my feeds and speeds chart was way off

I was running a 6061 aluminum part on a Haas TM-1 last week and couldn't figure out why the finish looked like garbage. Checked my spindle load and it was barely 20 percent, so I bumped the feed from 20 IPM to 35 IPM on a 3/8 end mill. Night and day difference in surface finish, and I felt dumb for not trying it sooner. Has anyone else had a similar brain fart where you just assumed the old numbers were right?

2 comments

2 Comments

wesley_thompson22d ago

Yeah that chart gets everyone at first.

anna98322d ago

That chart is actually missing a few key datapoints. The green line there doesn't account for the seasonal adjustments they made last quarter. Usually throws the whole thing off by about 15 percent.