12.93 12 Functional Descriptions
12.18.16 Examples
Example calculations of u
dz
and u
dy
.
mm
mm
degrees
degrees
u
dz
=sin °
m
n
*
· 360
u
dy
=cos
°
m
n
*
· 360
in which
m
n
= Normal modulus (in mm)
° = Angle of incline of gear
° = Lead angle of hobber
Configuring the GI grouping via the part program
1st leading axis = Cutter spindle B (setpoint link K1)
2nd leading axis = Axis Z (setpoint link K1)
3rd leading axis = Axis Y (setpoint link K1)
Following axis = Rotary axis C
Define configuration
: G401 B K1 Z K1 Y K1 C LF
Activate link:
R100=z0 R101=z2 R102=udz R103=z2 R104=udy R105=z2 LF
G402 B I=R100 J=R101 Z I=R102 J=R103 Y I=R104 J=R105 C LF
Please refer to previous page for explanation of abbreviations.
12.18.16.3 Inclined infeed axes
Many users of machines with inclined axes require an NC part program which allows non-
perpendicular NC axes to be treated in the same way as perpendicular axes for programming
purposes.
Two different systems of co-ordinates are therefore provided:
• A non-cartesian, real co-ordinate system of machine axes
• A cartesian, simulated co-ordinate system
The GI functionality is so universal in design that the above demand can be satisfied.
This option is explained below using the example of a grinding machine with an inclined axis.
The diagram below shows a plain grinding machine with a U axis inclined in relation to the Z1
axis by an angle of 90°- .
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50
12–177
SINUMERIK 840C (IA)