HEIDENHAIN TNC 426 CB, Technical Manual

Page: 471 / 1135

December 2001 The Control Loop 6 – 141
Machine type 2:
7 7 7 7 The machine is commissioned as usual until the k
V
factor is to be
determined.
7 7 7 7 Enter MP2602.x = 1 and MP2604.x = 0.
7 7 7 7 Increase the k
V
factor (MP1510.x) until you reach the oscillation limit.
7 7 7 7 Starting value:
7 7 7 7 Change MP2604.x, normally by reducing it, until the following error is at its
minimum.
7 7 7 7
MP2602.0-8 IPC time constant T
1
for axes 1 to 9
Input: 0.0001 to 1.0000 [s]
0: IPC inactive
MP2604.0-8 IPC time constant T
2
for axes 1 to 9
Input: 0.0001 to 1.0000 [s]
0: IPC inactive
Minimizing the
following error
during the jerk
phase An increased following error during the jerk phase can be minimized with
MP2606.x. The preceding adjustment of the IPC must have been carried out
for this to function.
The typical entry value for MP2606.x is between 0.5 and 2.
Commissioning:
7 7 7 7 Enter the following test program:
0 BEGIN PGM TEST MM
1 LBL 1
2 L X <maximum traverse> R0 FMAX
3 L X0 FMAX
4 CALL LBL1 REP 10/10
5 END PGM TEST MM
7 7 7 7 Run the program at high speed.
7 7 7 7 Use the integrated oscilloscope to record the following error.
7
7 7
7 Change MP2606.x until a very small following error occurs in the jerk phase
(positive following error: MP2606.x > 1, negative following error:
MP2606 < 1)
MP2606.0-8 Following error during the jerk phase for axes 1 to 9
Input: 0.000 to 10.000
MP2604.x
2
3
---
MP2600.x
MP2500.x
--------------------------------
⋅
=
MP1510.x 0.65 determined k
V
⋅
=