Circular Interpolation Feed Adjuster

Calculate required centerline feed rates to maintain chip load during G02/G03 arcs.

Inputs

Formulas used:
Internal Arc: Machine Feed = Target Feed × ((Hole Dia - Tool Dia) / Hole Dia)
External Arc: Machine Feed = Target Feed × ((Boss Dia + Tool Dia) / Boss Dia)
When writing CNC code, the machine controls the tool's centerline, but the chip load happens at the periphery. This calculation scales the centerline feed to normalize the peripheral feed.

Results

Programmed Centerline Feed (IPM)
0.0 IPM
Toolpath Style
Internal
Adjustment Factor
1.00x
Effective Peripheral Feed (At cutting edge)
0.0 IPM