Part 1 of CNCCookbook's "Quick Course in Feeds and Speeds" takes you through some of the theory. It's a 10 minute video that covers things like chip thinning, relationship of cutter edge radius to chip thickness for best tool life, ballnose cutter compensation, and a number of other topics associated with feeds and speeds. Part 2 (see below), gives a demo of the G-Wizard Feeds and Speeds software that puts the theory into practice.
Part 2 of CNCCookbook's "Quick Course in Feeds and Speeds" gives a demo of the G-Wizard Feeds and Speeds software that puts the theory discussed in Part 1 (above) into practice.
A truly horrendously bad screen capture of the early alpha version of a G-Code Editor I am writing. Sign up for G-Wizard and you'll get the details on the editor when it's ready for Beta Test!
Making a DRO reader
bracket for the mill's X-axis. This is a 3/16" 3 fl endmill, 1600
rpm, 5.4 IPM feedrate, and a 0.070" depth of cut. Little bit of
chatter where it changes direction and bites into the largest
amount of cutter engagement. 5/11/09.
Same DRO bracket.
I'm using the Surfacing function from the Newfangled Solutions
Mach3 Wizard to cut a little pocket to hold the DRO's read head.
That's a 5/8" Iscar Helimill using APKT inserts. 1600 rpm, 20
IPM, and 0.070" depth of cut. The Helimill does a real nice job,
and there's plenty of HP and rigidity in the IH mill to take good
advantage of it. I'd like to try a 3/4 or even a 1" and see how
it did. 5/11/09.
IH CNC Mill surfacing
6061 w/ 5/8" Helimill indexable endmill. 1600 rpm spindle,
10 IPM, 0.100" DOC. Gave a great surface finish!
Shots from my R8 holder rack project. We're cutting polyboard. Most of the racket is my old Sears upright air compressor.
2" x 7 APKT Inesrt Facemilling a 6061 Turner's Cube Blank at 100 IPM. DOC is like 0.030"
Same cube, now 20 IPM for a finish pass. It came out nice.
Flying along at 50IPM to rough the Swing Blocks for a Tapping Arm. Despite the steam from mist vaporizing, the heat was all in the chips. The cutter was stone cool to the touch immediately afterward. Thank you G-Wizard!
The finish pass at 20 IPM (much slower than the 50 IPM roughing to get a nicer surface finish). I used a brand new sharp HSS 4 flute...
