HEIDENHAIN TNC 407, Руководство пользователя

Страница: 263 / 333

8-43
8 Cycles
TNC 426/TNC 425/TNC 415 B/TNC 407
Fig. 8.47: Datum shift, incremental Fig. 8.46: Datum shift, absolute
Fig. 8.45: Activation of datum shift
8.5 Coordinate Transformations
Y
X
Z
X
Y
Y
X
Z
IX
IY
X
Y
Z
Y
X
Z
DATUM SHIFT (G54)
Application
A datum shift allows machining operations to be repeated at various
locations on the workpiece.
Activation
When the DATUM SHIFT cycle is defined, all coordinate data are based on
the new datum. The datum shift is shown in the additional status display.
Input data
For a datum shift, you need only enter the coordinates of the new datum
(zero point). Absolute values are referenced to the manually set workpiece
datum. Incremental values are referenced to the datum which was last
valid (this can be a datum which has already been shifted).
Cancellation
A datum shift is cancelled by entering the datum shift coordinates X = 0,
Y = 0 and Z = 0.
When combining transformations, a datum shift must be programmed before the other transformations.
Graphics
If you program a new workpiece blank after a datum shift, MP 7310
determines whether the workpiece blank is referenced to the current
datum or the original datum (MP 7310: see page 11-11). Referencing a
new workpiece blank to the current datum enables you to display each part
in a program in which several parts are machined.