Optimize K V Factor For The Machining Feed-Rate (X-Axis) - HEIDENHAIN TNC 415 Technical Manual

k v factor
Adjust the k v factor (MP1810) so that the voltage characteristic is as described in the section "Servo
positioning". If a different k v -factor is required for rapid traverse to that for the machining feed-rate, it
must be optimized separately.

Optimize k v factor for the machining feed-rate (X-axis)

Connect storage oscilloscope to tachometer
of the servo amplifier of the X axis
"PROGRAM RUN/FULL SEQUENCE"
Caution: Set feed-rate override to 100 %.
MP1810: Increase entry value until control loop oscillates or overshoot
occurs after the acceleration ramp.
Machining feed-rate
MP1810 (k v -factor): Reduce entry value until no oscillations can be detected.
Repeat trimming procedure for axes Y, Z, IV and V.
1)
Program the traverse paths for the axis concerned as large as possible.
2)
Enter the max. feed-rate for machining.
For axes which are mutually interpolated the k
In this case the worst axis determines the entry value.
01.98 TNC 407/TNC 415/TNC 425
Enter following program in
"PROGRAMMING AND EDITING"
operating mode:
LBL 1
X 100 1) R0 F 2) ...
X 0 R0 F 2) ...
CALL LBL 1 REP 100/100
Press external START button in
operating mode, machine runs.
U [V]
U [V]
v
16 Commissioning and start-up procedure
t [s]
t [s]
factor must be the same.
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