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8 Programming: Cycles
220
DATUM SHIFT (Cycle 7)
A datum shift allows machining operations to be repeated at various
locations on the workpiece.
Effect
When the DATUM SHIFT cycle is defined, all coordinate data is
based on the new datum. The TNC displays the datum shift in each
axis in the additional status display. Input of rotary axes is also
permitted.
ú
Datum shift: Enter the coordinates of the new datum.
Absolute values are referenced to the manually set
workpiece datum. Incremental values are always
referenced to the datum which was last valid — this
can be a datum which has already been shifted.
Example NC blocks:
73 CYCL DEF 7.0 DATUM SHIFT
74 CYCL DEF 7.1 X+10
75 CYCL DEF 7.2 Y+10
76 CYCL DEF 7.3 Z-5
Cancellation
A datum shift is canceled by entering the datum shift coordinates
X=0, Y=0 and Z=0.
Graphics
If you program a new BLK FORM after a datum shift, you can use
machine parameter 7310 to determine whether the BLK FORM is
referenced to the current datum or to the original datum.
Referencing a new BLK FORM to the current datum enables you to
display each part in a program in which several pallets are
machined.
Status Displays
■
The actual position values are referenced to the active (shifted)
datum.
■
All of the position values shown in the additional status display
are referenced to the manually set datum.
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Содержание TNC 426 B
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Страница 17: ...Introduction 1 Dkap1 pm6 30 06 2006 07 03 1 www EngineeringBooksPdf com ...
Страница 29: ...Manual Operation and Setup 2 Dkap2_3 pm6 30 06 2006 07 03 13 www EngineeringBooksPdf com ...
Страница 39: ...Positioning with Manual Data Input MDI 3 Dkap2_3 pm6 30 06 2006 07 03 23 www EngineeringBooksPdf com ...
Страница 83: ...Programming Tools 5 Fkap5 pm6 30 06 2006 07 03 67 www EngineeringBooksPdf com ...
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Страница 107: ...Programming Programming Contours 6 Gkap6 pm6 30 06 2006 07 04 91 www EngineeringBooksPdf com ...
Страница 148: ...Programming Miscellaneous functions 7 Hkap7 pm6 30 06 2006 07 03 133 www EngineeringBooksPdf com ...
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Страница 166: ...Programming Cycles 8 kkap8 pm6 30 06 2006 07 03 151 www EngineeringBooksPdf com ...
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Страница 254: ...Programming Subprograms and Program Section Repeats 9 LKAP9 PM6 30 06 2006 07 04 239 www EngineeringBooksPdf com ...
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Страница 266: ...Programming Q Parameters 10 MKAP10 PM6 30 06 2006 07 04 251 www EngineeringBooksPdf com ...
Страница 297: ...MKAP10 PM6 30 06 2006 07 04 282 www EngineeringBooksPdf com ...
Страница 298: ...Test Run and Program Run 11 NKAP11 PM6 30 06 2006 07 04 283 www EngineeringBooksPdf com ...
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