Error Diagnosis Of Hr 520 Portable Handwheel With Display - HEIDENHAIN iTNC 530 HSCI Service Manual

25.4 Error diagnosis of HR 520 portable handwheel with display

Control impaired? If you suspect that a damaged handwheel or a handwheel into which liquid has penetrated impairs the
function of the control:
Visual inspection
Examine the device for damage. Are keys heavily contaminated? Are there any jammed chips?
Have liquids entered, etc.?
Functional check
Power supply OK? The HR 520 is powered by the MB 620 or the HSCI adapter PLB 6001 with +12 V at connector X23.
If you have a test adapter, you can use it to check whether the power supply is OK:
25 – 404
Disconnect the handwheel and observe the reaction. --> See "Deselecting and disconnecting the
portable handwheel" on page 25 – 412.
Visually inspect the HR, EMERGENCY STOP button, keys, potentiometers, cable, contacts, etc.
Switch on the machine.
Select the Elec. Handwheel operating mode.
Set the position display of the control to NOML.
Observe whether this display changes, while you turn the handwheel.
Check, whether the EMERGENCY STOP button and all other keys function properly.
Note
If available, connect an identical handwheel and test its function.
Connector X23 on MB 620 or HSCI adapter PLB 6001
Pin 2
Pin 4
Shut down the control and switch off the machine.
Unfasten the mounting screws of the machine operating panel.
Lift out the machine operating panel until you can disconnect the connector X23.
Connect the test adapter between the handwheel and the connector X23 of the machine operating
panel. (See "Test adapter" on page 30 – 560.)
Switch on the machine.
Measure, whether there are +12 V between pin 2 (0 V) and pin 4 (+12 V).
Assignment
0 V
+12 V
HEIDENHAIN Service Manual iTNC 530 HSCI