Chip load/feed per tooth calculation

[TravisR100]

I must be figuring this wrong or I'm not understanding something correctly. On my Haas mill I'm using a 5 insert 2.5" face mill runnig at 755 RPM at 19 IPM. What does the chip load come out to? The Haas is reporting the chip load at .0126. Wouldn't this be a chip load of .0032? Or is the feed rate the Haas reports not in IPM?

[mls]

It looks like your tool is set to 2 flutes in the haas control

[mls]

I think your chip load is more like .005 per tooth

rpm x feed per tooth = feed

755 x .025 (.005 x 5 teeth) = 18.75 inch per minute

Hope this helps Mike

[King bob]

Have you inputed tool information in the of set page? If not you might be
getting skewed info from an old setting/offset.

[TravisR100]

Originally Posted by King bob Have you inputed tool information in the of set page? If not you might be getting skewed info from an old setting/offset.

I've already powered down the machine for the night but I'll go back and check that. Now that you mention it it's definitely possible that I missed setting the correct number of flutes when I set the tools up for this job. Thanks.

I knew I had to be missing something somewhere. Those numbers just didn't make sense.

[rawen2]

I also come up with .005" per tooth chip load.
19"/755 rpm = .025165" per revolution.
.025165"/5 teeth = .005033" per tooth.
Ralph

[peter.blais]

Just to stick it into one equation

Feed = RPM * Chip load per tooth * number of teeth

If the haas control is not reporting the right schtuff, you don't have the right number of flutes in the tool offset page.

[Gabe Newell]

Me, three.

At .0032 per tooth, it's 12.080 IPM.

[crabbass]

for what it's worth,
I leave all of the flute # set to 1 in the offset page. When the machine is running you can easily divide the number on the control by the number of flutes the tool being used has in your head, or use a calculator if you want an exact figure.
For long run jobs, If I was an operator that was bored, I would probably set the tool type in the IPS to match(drill, e-mill, etc.), the flutes, and all. But for quick change out jobs, and wanting to input the minimal information into the control, this is what I have found to work best for me.

[TravisR100]

Crab, that's a great idea actually. I'll go reset them all to 1. Obviously I forget to enter the correct number of flutes when setting up tools.

[15mgtar]

Originally Posted by peter.blais Just to stick it into one equation Feed = RPM * Chip load per tooth * number of teeth If the haas control is not reporting the right schtuff, you don't have the right number of flutes in the tool offset page.

excuse my ignorance but where do I get the "Chip load per tooth" data for metric endmills? (I'm doing wood)