Miscellaneous Functions For Rotary Axes; Feed Rate In Mm/Min On Rotary Axes A, B, C: M116 (Option 8) - HEIDENHAIN TNC 620 User Manual

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11.4 Miscellaneous functions for rotary axes

Feed rate in mm/min on rotary axes A, B, C: M116
(option 8)
Standard behavior
The control interprets the programmed feed rate of a rotary axis in
degrees/min (in mm programs and also in inch programs). The 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
Refer to your machine manual.
The machine geometry must be specified by the machine
tool builder in the kinematics description.
Programming notes:
The M116 function can be used with table axes and
head axes.
The M116 function also has an effect if the Tilt
working plane function is active.
It is not possible to combine the M128 or TCPM
function with M116. If you want to activate M116 for
an axis while the M128 or TCPM function is active,
then you must indirectly deactivate the compensating
movement for this axis using M138. This is done
indirectly because, with M138, you specify the axis
for which the M128 or TCPM function takes effect.
Thus, M116 automatically affects the axis that was
not selected with M138.
Further information: "Selecting tilting axes: M138",
Page 467
Without the M128 or TCPM function, M116 can take
effect for two rotary axes at the same time.
The control interprets the programmed feed rate of a rotary axis in
mm/min (or 1/10 inch/min). In this case, the control calculates the
feed for the block at the start of each NC block. The feed rate of a
rotary axis will not change while the NC block is executed, even if the
tool moves toward the center of the rotary axis.
Effect
M116 is effective in the working plane. Reset M116 with M117. At
the end of the program, M116 is automatically canceled.
M116 becomes effective at the start of the block.
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Multiple-axis machining | Miscellaneous functions for rotary axes
HEIDENHAIN | TNC 620 | Klartext Programming User's Manual | 01/2022