HEIDENHAIN TNC 407 (280 580) User Manual User Manual
Page 169
TNC 425/TNC 415 B/TNC 407
5-70
5
Programming Tool Movements
Reducing display of the rotary axis to a value less than 360°: M94
Standard behavior – without M94
The TNC moves the tool from the current angular value to the pro-
grammed angular value.
Example: Current angular value:
538°
Programmed angular value:
180°
Actual path of traverse:
–358°
Reducing display of the rotary axis to a value less than 360° – with M94
At the start of block, the TNC reduces the current angular value to a value
less than 360° and then moves the tool to the programmed value. If
several rotary axes are active, the miscellaneous function M94 will reduce
the displayed values of all rotary axes. If you enter a specific rotary axis
after M94, the TNC will only reduce the display for this axis.
Example: L M94
Reduce the displayed values of all
active rotary axes
L M94 C
Reduce the displayed value of the
C axis only
L C+180 FMAX M94
Reduce the displayed values of all
rotary axes and then move the tool
in the C axis to the programmed
value.
Current angular value:
538°
Programmed angular value:
180°
Actual path of traverse:
+2°
Duration of effect
M94 is effective at the start of block and only in the blocks in which it is
programmed.
Superimposing handwheel positioning during program run: M118 X... Y... Z...
Standard behavior – without M118
In the program run modes, the TNC moves the tool as defined in the part
program.
Superimposing handwheel positioning – with M118 X... Y... Z...
M118 permits manual corrections by handwheel during program run. The
range of this superimposed movement is entered behind M118 (in mm) in
axis-specific values for X, Y and Z.
Duration of effect
M118 X... Y... Z... is cancelled by entering M118 without the values X, Y
and Z.
Example: You wish to be able to use the handwheel during program run to
move the tool in the working plane X/Y by ±1 mm.
Example NC block: L X+0 Y+38.5 RL F125 M118 X1 Y1
M Functions for Contouring Behavior
M118 X.. Y.. Z.. is also effective in the POSITIONING WITH MDI mode.