Activate Monitoring Functions; Compensate The Backlash - HEIDENHAIN iTNC 530 Technical Manual

6 – 252

5. Activate monitoring functions:

Note
To ensure that the monitoring functions become effective at the right
moment, you must enter meaningful values.
HEIDENHAIN recommends the following input values. You must change
these values slightly to adapt them to the design of the machine.
MP Temporary input
value
MP1030.x 0.01 mm
MP1110.x 2 · MP1030.x
MP1140.x 0.03 [1000 rpm]
MP1144.x 0.5 mm
MP1410.x 0.5 mm
MP1420.x 2 mm
MP1710.x 1.2 · following error
in rapid traverse
MP1720.x 1.4 · following error
in rapid traverse

6. Compensate the backlash:

If the cause of the backlash is outside of the control loop:
7 Enter the backlash in MP710.x.
If the cause of the backlash is inside of the control loop:
7 Enter the following test program:
LBL 1
L X100 R0 F10
L X0
CALL LBL 1 REP 100/100
7 Use the internal oscilloscope to record ACTL. SPEED and V (ACT RPM). At
the reversal point the actual feed rate follows the actual shaft speed by the
time delay t.
7 Set the machine parameters:
• MP750 = t · ∆V ACTL (Keep in mind the units for t and ∆V ACTL)
• MP752 = approx. 20 ms (determined in test)
∆V ACTL
–
V ACTL
=
Meaning
Positioning window
Standstill monitoring
Movement monitoring
Motion monitor for position and speed
Position monitoring in operation with
velocity feedforward control (erasable)
Position monitoring in operation with
velocity feedforward control
(EMERGENCY STOP)
Position monitoring in operation with
following error (erasable)
Position monitoring in operation with
following error (EMERGENCY STOP)
V (ACT RPM)
HEIDENHAIN Technical Manual iTNC 530