HEIDENHAIN iTNC 530 Service Manual page 343

Flowchart If nevertheless one or several analog axes do not function, you may investigate the following:
May 2006
Analog axis does not move
Switch the machine off and connect a multimeter
to the terminal strip of the servo amplifier of the
axis to be checked.
(Use the circuit diagram of the machine.)
Switch off the main switch of the machine.
Do not confirm the Power interrupted message but
immediately call the MP list and increase the tolerances
for movement and following-error monitoring in the axis
to be checked:
MP 1140.x : 9.99 [V]
MP 1410.x :
MP 1420.x :
MP 1710.x : 300 [mm]
MP 1720.x : 300 [mm]
(Note down the original values and restore them later.)
Switch the machine on and
set the position display to LAG.
Turn the feed-rate potentiometer to zero
and start reference run for the defective axis
(e.g. with axis direction button).
Slowly turn up the feed-rate potentiometer
and observe the display of the multimeter.
Does the mulitmeter read a
voltage in the range of +/- 10 V?
Switch the machine off and disconnect the analog
servo amplifier from the speed command cable.
Repeat the above procedure with the servo amplifier
disconnected.
Does the mulitmeter read a
voltage in the range of +/- 10 V?
MC or speed command cable defective.
30 [mm]
30 [mm]
Yes
No
Yes
No
The MC operates correctly;
the defect is probably due to the
analog servo amplifier and its
cables, to the motor etc.
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