Programming manual
CNC 8070
ADDITIONAL PREPARATORY FUNCTIONS
Hirth axes (G170-G171)
8.
(SOFT V02.0X)
147
8.3 Hirth axes (G170-G171)
Hirth axes may be canceled and activated by program. When a Hirth
axis is active, it can only reach concrete positions whereas when
deactivated, it behaves like a normal rotary or linear axis and can
reach any position.
Programming
Hirth axes may be canceled and activated using:
G170 Hirth axes OFF.
G171 Hirth axes ON.
To activate or cancel a Hirth axis, program its relevant function and
then the axes to be activated or canceled and the number indicating
the order in which those axes will be activated.
If when activating a Hirth axis, it is located in the wrong position, the
CNC will issue a warning so the operator can turn it to a correct
position.
Considerations
A Hirth axis must always be positioned at specific positions. When
positioning, the active zero offset (preset or zero offset) is taken into
consideration.
Both linear and rotary axes may be Hirth. Only those axes defined as
Hirth axes by the machine manufacturer [A.M.P. "HIRTH"] may be
activated as Hirth axes.
Properties of the functions
Functions G170 and G171 are modal and incompatible with each
other.
On power-up, after an M02 or M30 and after an EMERGENCY or a
RESET, the CNC activates all the Hirth axes.
G171 B1 C2 (Activate B and C axes as Hirth axes)
G01 B50 C20 (Interpolate both axes)
...
G170 B1 (B axis deactivation)
G01 X100 B33
Assuming that the B and C axes have been set as rotary Hirth axes with a
10º pitch.
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