Originally Posted by
dminnery
Here is another test I ran at Louie's suggestion. A picture is worth a thousand words, so here they are.
I tried four bits, all 1/4" solid carbide onsrud: single flute upcut, double flute upcut, triple flute upcut, and a compression bit.
All cuts were at 80ipm, 20k rpm, porter cable router 892, 2.25 hp, with a precision collet.
I tried cutting straight lines on the Y axis, single passes at .05", .1", .15" and .2"
I also cut 3 circles, single pass at .1", .15" and .2"
You can see where most of the deeper circle cuts reflect a lot of vibration where the router is physically vibrating.
The machine is sloppy, no doubt. could use some help.
Dust collection is very good, so that is not causing the issue.
The last photo is a closeup of the compression bit test.