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4 Programming: Fundamentals of NC, File Management,
Programming Aids, Pallet Management
4.1 Fundamentals of NC
4.1 Fundamentals of NC
Position encoders and reference marks
The machine axes are equipped with position encoders that
register the positions of the machine table or tool. When a machine
axis moves, the corresponding position encoder generates an
electrical signal. The TNC evaluates this signal and calculates the
precise actual position of the machine axis.
If there is an interruption of power, the calculated position will no
longer correspond to the actual position of the machine slide. The
CNC can re-establish this relationship with the aid of reference
marks when power is returned. The scales of the position encoders
contain one or more reference marks that transmit a signal to the
TNC when they are crossed over. From the signal the TNC identifies
that position as the machine-axis reference point and can re-
establish the assignment of displayed positions to machine axis
positions.
Linear encoders are generally used for linear axes. Rotary tables
and tilt axes have angle encoders. If the position encoders feature
distance-coded reference marks, you only need to move each axis a
maximum of 20 mm (0.8 in.) for linear encoders, and 20° for angle
encoders, to re-establish the assignment of the displayed positions
to machine axis positions.
Y
X
Z
X (Z,Y)
X
MP
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Содержание TNC 426 B
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Страница 6: ...CINHALT PM6 30 06 2006 07 03 2 www EngineeringBooksPdf com ...
Страница 16: ...CINHALT PM6 30 06 2006 07 03 12 www EngineeringBooksPdf com ...
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 ...
Страница 106: ...Fkap5 pm6 30 06 2006 07 03 90 www EngineeringBooksPdf com ...
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 ...
Страница 165: ...Hkap7 pm6 30 06 2006 07 03 150 www EngineeringBooksPdf com ...
Страница 166: ...Programming Cycles 8 kkap8 pm6 30 06 2006 07 03 151 www EngineeringBooksPdf com ...
Страница 253: ...kkap8 pm6 30 06 2006 07 04 238 www EngineeringBooksPdf com ...
Страница 254: ...Programming Subprograms and Program Section Repeats 9 LKAP9 PM6 30 06 2006 07 04 239 www EngineeringBooksPdf com ...
Страница 265: ...LKAP9 PM6 30 06 2006 07 04 250 www EngineeringBooksPdf com ...
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 ...
Страница 312: ...MOD Functions 12 Okap12 pm6 30 06 2006 07 04 297 www EngineeringBooksPdf com ...
Страница 332: ...Tables and Overviews 13 Pkap13 pm6 30 06 2006 07 04 317 www EngineeringBooksPdf com ...