Optimizing The Control With Feedforward Control; Optimize K V Factor - HEIDENHAIN TNC 415 Technical Manual

16.3.7 Optimizing the control with feedforward control (MP1390 = 0)
The following provisional values can be entered for the machine parameters which determine the
control characteristics:
Machine parameter
MP1050
MP1060
MP1510
MP1520
These values can usually be further optimized.

Optimize k v factor

Connect storage oscilloscope to tachometer
of the servo-amplifier of the X axis.
k v factor MP1510: Increase entry value until position loop oscillates.
k v factor MP1510: Reduce entry value until no oscillations can be detected.
1)
Program the traverse paths for the axis concerned as large as possible.
4-268 TNC 407/TNC 415/TNC 425
Function
Analogue voltage for rapid
traverse
Acceleration
k v factor
Position approach
Enter following program in
"PROGRAMMING AND EDITING"
operating mode:
LBL 1
X 100 1) R0 F MAX
X 0 R0 F MAX
CALL LBL 1 REP 100/100
Press machine START button in the
"PROGRAM RUN/SINGLE BLOCK"
operating mode.
Machine runs.
U [V]
U [V]
16 Commissioning and start-up procedure
Provisional entry value
9 V
As measured on the machine
(see "Preparation of the machine")
1
0.5 [m/min]
t [ms]
t [ms]
01.98