![HEIDENHAIN TNC 426 B User Manual Download Page 159](http://html.mh-extra.com/html/heidenhain/tnc-426-b/tnc-426-b_user-manual_2118720159.webp)
7 Programming: Miscellaneous functions
144
7.5
Miscellaneous Functions for Rotary
Axes
Feed rate in mm/min
on rotary axes A, B, C: M116
Standard behavior
The TNC interprets the programmed feed rate in a rotary axis in
degrees per minute. The contouring feed rate therefore depends
on the distance from the tool center to the center of the rotary axis.
The larger this distance becomes, the greater the contouring feed
rate.
Feed rate in mm/min on rotary axes with M116
The machine geometry must be entered in machine
parameters 7510 ff. by the machine tool builder.
The TNC interprets the programmed feed rate in a rotary axis in
mm/min. With this miscellaneous function, the TNC calculates the
feed rate for each block at the
start
of the individual block. The feed
rate is not changed during execution of the block even if the tool
moves toward the center of the rotary axis.
Effect
M116 is effective in the working plane.
You can cancel M116 with M117; at the end of the program M116 is
also reset.
M116 becomes effective at the start of block.
Shorter-path traverse of rotary axes: M126
Standard behavior
The standard behavior of the TNC while positioning rotary axes
whose display has been reduced to values less than 360° is
dependent on machine parameter 7682. In machine parameter
7682 is set whether the TNC should consider the difference
between nominal and actual position, or whether the TNC should
always (even without M126) choose the shortest path traverse to
the programmed position. The table at upper right shows
examples.
Behavior with M126
With M126, the TNC will move the axis on the shorter path of
traverse if you reduce display of a rotary axis to a value less than
360°. The table at lower right shows examples.
Effect
M126 becomes effective at the start of block. To cancel M126,
enter M127. At the end of program, M126 is automatically canceled.
7.5 Miscellaneous F
unctions f
o
r
Rotary A
x
e
s
Standard behavior of the TNC
Actual position
Nominal position Traverse
350°
10°
–340°
10°
340°
+330°
Behavior with M126
Actual position
Nominal position Traverse
350°
10°
+20°
10°
340°
–30°
Hkap7.pm6
30.06.2006, 07:03
144
www.EngineeringBooksPdf.com
Summary of Contents for TNC 426 B
Page 3: ...BAUSKLA PM6 30 06 2006 07 03 2 www EngineeringBooksPdf com ...
Page 4: ...BAUSKLA PM6 30 06 2006 07 03 3 www EngineeringBooksPdf com ...
Page 6: ...CINHALT PM6 30 06 2006 07 03 2 www EngineeringBooksPdf com ...
Page 16: ...CINHALT PM6 30 06 2006 07 03 12 www EngineeringBooksPdf com ...
Page 17: ...Introduction 1 Dkap1 pm6 30 06 2006 07 03 1 www EngineeringBooksPdf com ...
Page 29: ...Manual Operation and Setup 2 Dkap2_3 pm6 30 06 2006 07 03 13 www EngineeringBooksPdf com ...
Page 83: ...Programming Tools 5 Fkap5 pm6 30 06 2006 07 03 67 www EngineeringBooksPdf com ...
Page 106: ...Fkap5 pm6 30 06 2006 07 03 90 www EngineeringBooksPdf com ...
Page 107: ...Programming Programming Contours 6 Gkap6 pm6 30 06 2006 07 04 91 www EngineeringBooksPdf com ...
Page 165: ...Hkap7 pm6 30 06 2006 07 03 150 www EngineeringBooksPdf com ...
Page 166: ...Programming Cycles 8 kkap8 pm6 30 06 2006 07 03 151 www EngineeringBooksPdf com ...
Page 253: ...kkap8 pm6 30 06 2006 07 04 238 www EngineeringBooksPdf com ...
Page 265: ...LKAP9 PM6 30 06 2006 07 04 250 www EngineeringBooksPdf com ...
Page 266: ...Programming Q Parameters 10 MKAP10 PM6 30 06 2006 07 04 251 www EngineeringBooksPdf com ...
Page 297: ...MKAP10 PM6 30 06 2006 07 04 282 www EngineeringBooksPdf com ...
Page 298: ...Test Run and Program Run 11 NKAP11 PM6 30 06 2006 07 04 283 www EngineeringBooksPdf com ...
Page 312: ...MOD Functions 12 Okap12 pm6 30 06 2006 07 04 297 www EngineeringBooksPdf com ...
Page 332: ...Tables and Overviews 13 Pkap13 pm6 30 06 2006 07 04 317 www EngineeringBooksPdf com ...