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Additional information on offsetting -SW / -FW wiper inserts

Compensations ① , ④ Tool offsets (Compensations for X- and Z-axis)

Why need to offset ?

Ex. When using DNMG150412

The wiper insert does not provide the exact corner radius. A deviation from the standard nose radius shape as shown below will always occur when going into a corner. An additional program adjustment is, therefore, required to achieve the correct corner radius or tapered surface dimension on the workpiece. Before offset After offset Deviation (Compensation is than nominal raidus) necessary for the nose radius) No deviation (larger

Wiper insert Nominal nose radius

Wiper nose radius' contour is slightlyWiper nose radius' contour is partially larger than the nominal radius.
smaller than the nominal radius.→ No compensations necessary for ID, OD, or face turning.
→ The nose radius profile deviates from theMeanwhile, due to these deviations, compensations to the NC program
required corner radius, thus the actual cornerare necessary when turning corners and tapered surfaces for the correct
profile will be incorrect.workpiece dimensions.

Compensations ③ , ⑥ Program compensation for corner radii

(proceed after ① , ④ )

Compensation for corner radius

Ex. When using DNMG150412

Example: to machine a corner radius = R2.0 mm, using insert nose radius = R1.2 mm. For standard ISO insert: DNMG150412-** Input R0.8 for G2 or G3 (circular interpolation) to compensate the nose radius deviation. The deviation generated when using the ISO insert parameters for the wiper insert. Actual corner radius: 0.1 mm Wiper insert For wiper insert: DNMG150412-SW/-FW R 2.0 mm Input R1.14 (= R1.2 + 0.34 from the list) Theoretical corner radius shape when R1.2 for the nose radius, instead of R0.8, to (=nominal nose radius) is programmed for compensate the nose radius deviation. the wiper insert The actual corner radius becomes smaller than the required radius due to the insert radius deviation.

Corner radius = R1.66 mm

(R2.0 - 0.34)