Siemens SINUMERIK 840C - Manual (Page 955)

12 Functional Descriptions 01.99
12.18.16 Examples
Programming the GI groupings via the part program:
GI grouping 1: 1st leading axis = X
Following axis = U
Setpoint position link without compensatory controller (for simulation axes,
K3)
Define configuration:
G401 X K3 U LF
Activate link: @631 R100 K20.5 LF
G402 X I1 J=R100 U LF
GI grouping 2: 1st leading axis = X
2nd leading axis = Z
Following axis = Z1
Setpoint position link without compensatory controller (for simulation axes,
K3)
Define configuration: G401 X K3 Z K3 Z1= LF
Activate link:
@632 R101 K20.5 LF
G402 X I=-R101 J1 Z I1 J1 Z1= LF
Measures to be taken after machine is switched on
The real following axes must first approach the reference point. They must then be
synchronized with the simulated leading axes (on-the-fly synchronization).
Notes on application:
For the execution of NC part programs, the solution based on GI for compensating the inclined
axis can be applied provided that the following points are considered:
1. No axis disabling signals may be present for the fictitious axes. The latter must be
declared as simulated axes via machine data MD 200* or the axis actual values will
otherwise be set to zero on reset.
2. The real axes must be prevented from traversing in JOG mode. They may move only on
traversal of the simulated axes. In other words:
Traversal of the X axis in JOG traversal of both real axes (in this case, U and Z1).
Traversal of the Z axis in JOG traversal of the real axis (in this case, Z1).
It must however be possible for the real axes to approach the reference point.
3. Since only the real axes are capable of approaching the reference point, the simulation
axes must be synchronized with them on completion of this approach.
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SINUMERIK 840C (IA)