[hdrider15]

I am used to cutting/programming in thousands per rev. I.e. .002 per tooth but the new shop I am in they do every thing in inches per minute. So how do I convert .002 per tooth to inches per minute ?
Thanks

[angelw]

I am used to cutting/programming in thousands per rev. I.e. .002 per tooth but the new shop I am in they do every thing in inches per minute. So how do I convert .002 per tooth to inches per minute ?
Thanks

Hello hdrider15,
Following is the conversion algorithm:

IPM = CT x NT x SR

Where:

CT = Chip Thickness per Tooth
NT = Number of Teeth in Cutter
SR = Spindle RPM

Example
IMP = 0.002 x 4 x 3000
IMP = 24

Regards,

Bill

[sinha_nsit]

I find that most people use inch per revolution (CT x NT) because it gives direct control over chip thickness, independent of rpm..