Technical information Cutting data calculation
Cutting data calculation
Internal circular interpolation When using circular interpolation or helical interpolation ramping to increase the diameter of a hole in a workpiece, the stock removal depth is not the same as the width of cut value. The real width of cut must be calculated from the formula below. The width of cut value is then used for calculation of feed/tooth and feed speed.
Stock removal depth
a e > Stock removal depth
External circular interpolation When using external circular interpolation or helical interpolation ramping to decrease the diameter of a round workpiece the stock removal depth is not the same as the width of cut value. The real width of cut must be calculated from the formula below. The width of cut is then used for calculation of feed/tooth and feed speed.
Stock removal depth
a e > Stock removal depth
Increase the width of cut successively to full value For circular interpolation operations it is recommended to successively increase the width of cut up to full value. When using radial infeed up to full width of cut, reduce the feed/tooth and feed speed to half.
Successive increase of width of cut – recommended method.
Radial infeed – Reduce feed/tooth.
Circle for movement of centre of cutter
Feed speed related to the centre of the cutter When calculating feed speed and feed/tooth from average chip thickness using circular interpolation or helical interpolation ramping in an operation, the feed speed and feed/tooth are always related to the centre and not to the periphery of the cutter.
a e > Stock removal depth
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