HEIDENHAIN TNC 620 User Manual page 460

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Multiple axismachining

12.4 Miscellaneous functions for rotary axes

Miscellaneous functions for rotary

Feed rate in mm/min on rotary axes A, B, C: M116

Standard behavior

The TNC 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

Feed rate in mm/min on rotary axes with M116

The machine geometry must be specified by the

machine tool builder in the description of kinematics.

M116 works only on rotary tables. M116 cannot be

used with swivel heads. If your machine is equipped

with a table/head combination, the TNC ignores the

swivel-head rotary axes.

M116 is also effective in an active tilted working

plane and in combination with M128 if you used the

M138 function to select rotary axes.

Further Information:

Then M116 affects only those rotary axes that were

selected with M138.

The TNC interprets the programmed feed rate of a rotary axis in

mm/min (or 1/10 inch/min). In this case, the TNC calculates the

feed for the block at the start of each block. With a rotary axis, the

feed rate is not changed during execution of the block even if the

tool moves toward the center of the rotary axis.

M116 is effective in the working plane. Reset M116 with M117 . At

the end of the program, M116 is also ineffective.

M116 becomes effective at the start of block.

"Selecting tilting axes: M138",

HEIDENHAIN | TNC 620 | ISO Programming User's Manual | 9/2016

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