Search found 6577 matches

by GlennW
Sun Jan 20, 2008 11:14 pm
Forum: Home Shop CNC
Topic: End Mills
Replies: 15
Views: 6189

Didn't say it chattered. I was profiling parts out of the 1/2 x 4 flat and was looking for the best finish and speed on a single pass with my machine. Finish started to deteriorate at that speed with the two flute. Probably would have cut at a much faster feed but I was looking for good finish. Didn...
by GlennW
Sun Jan 20, 2008 5:00 pm
Forum: Home Shop CNC
Topic: End Mills
Replies: 15
Views: 6189

Due to stack up of other influencing factors, I try to interpolate a hole or make two parallel cuts, gauge it, and then set cutter comp acordingly.

Glenn
by GlennW
Sun Jan 20, 2008 3:35 pm
Forum: Home Shop CNC
Topic: End Mills
Replies: 15
Views: 6189

Hello Jim, They slot on size too. There are no opposing flutes so the cutter deflects to the small side. Re-cutting chips does not seem to effect size either as the deflection does not cause the opposing flute to go oversize. Think about it! Next test will be the $19.00 Accupro 3 flute vs the $10.00...
by GlennW
Sun Jan 20, 2008 11:24 am
Forum: General Discussion
Topic: End Mills
Replies: 0
Views: 706

End Mills

Posted a little end mill comparison in the CNC ection if anyone is interrested :wink:

Glenn
by GlennW
Sun Jan 20, 2008 11:17 am
Forum: Home Shop CNC
Topic: End Mills
Replies: 15
Views: 6189

End Mills

Did a little comparison test yesterday and got the results I sort of suspected. I needed to cut some parts from 6061 T6 Alum flat, 1/2 x 4". Tried a 2 flute HSS, a 2 flute high helix Crbide, a 4 flute high helix carbide, and a 3 flute high helix carbide (for aluminum). All at 1/2" DOC, slot milling,...
by GlennW
Sat Jan 19, 2008 9:57 pm
Forum: Lathes
Topic: Bison Chucks
Replies: 2
Views: 949

Bison Chucks

I bought a used second lathe a little over a year ago and the first thing I did was buy a new Bison 6 jaw Set-Tru 8" chuck and a Bison D1-5 back plate for it. Installed it and dialed it in to .0001" TIR using a 3/4 dowel pin and a B&S .00005" test indicator just to see if I could. I expected it to s...
by GlennW
Wed Jan 16, 2008 5:55 am
Forum: General Discussion
Topic: Need help in turning morse tapers
Replies: 16
Views: 2565

As far as accuracy goes... Offseting the tailstock is not a very good idea unless you have radiused or ball type dead centers. The sides of the dead centers no longer coincides with the sides of the drilled centers. The part is not very stable and accuracy will be diminished. It would be like trying...
by GlennW
Sun Jan 06, 2008 8:33 pm
Forum: Milling Machines
Topic: Milling speed and feed calculating
Replies: 18
Views: 3640

by GlennW
Sat Jan 05, 2008 9:12 pm
Forum: Milling Machines
Topic: Milling speed and feed calculating
Replies: 18
Views: 3640

Milling speed and feed calculating

Is there a formula for calculating depth of cut at the proper speed and feed rate for milling appications? Looked at Niagara Cutter's web site and they recommend to start shallow, increase the depth in 10-20% increments untl it chatters, and then back of 10-20% until it stops! Seems like there could...
by GlennW
Sat Jan 05, 2008 8:31 pm
Forum: Home Shop CNC
Topic: LazyCam Problems. Anyone using it?
Replies: 11
Views: 8131

Rather than a circle, why not just draw a polygon to test it!

Use the Polygon command, guaranteed connected end points.
by GlennW
Mon Dec 31, 2007 11:12 pm
Forum: General Discussion
Topic: Grizzly vs Meda Boring Bars: Grinding Revisited
Replies: 9
Views: 1290

Thanks Herold!
by GlennW
Mon Dec 31, 2007 8:42 pm
Forum: General Discussion
Topic: Grizzly vs Meda Boring Bars: Grinding Revisited
Replies: 9
Views: 1290

Hello Bill, Here they are. http://img.photobucket.com/albums/v647/Fighter1/PC310269.jpg Use CCGT inserts which I prefer in all my larger bars, but these work OK for .5" to 1.0" bores. Perhaps someone could explain how to post thumbnails. I tried searching for posting images and read about posting im...