486 Programming: Multiple Axis Machining
12.5 Miscellaneous Functions for Rotary Axes
Compensating the machine’s kinematics
configuration for ACTUAL/NOMINAL positions
at end of block: M144 (software option 2)
Standard behavior
The TNC moves the tool to the positions given in the part program. If
the position of a tilted axis changes in the program, the resulting offset
in the linear axes must be calculated, and traversed in a positioning
block.
Behavior with M144
The TNC calculates into the position value any changes in the
machine’s kinematics configuration which result, for example, from
adding a spindle attachment. If the position of a controlled tilted axis
changes, the position of the tool tip to the workpiece is also changed.
The resulting offset is calculated in the position display.
Effect
M144 becomes effective at the start of the block. M144 does not
function in connection with M114, M128 or a tilted working plane.
You can cancel M144 by programming M145.
Positioning blocks with M91/M92 are permitted if M144 is
active.
The position display in the operating modes FULL
SEQUENCE and SINGLE BLOCK does not change until the
tilting axes have reached their final position.
The machine geometry must be specified by the machine
tool builder in the description of kinematics.
The machine tool builder determines the behavior in the
automatic and manual operating modes. Refer to your
machine tool manual.
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