Error Diagnosis On Laser Touch Probe - HEIDENHAIN iTNC 530 Service Manual

25.5 Error Diagnosis on Laser Touch Probe

If you suspect that a damaged laser system or a laser system into which liquid has penetrated
Control impaired?
impairs the function of the control:
Visual inspection
Check whether the laser system or the cable is damaged, etc.
Checking the LEDs
Optical Status Indicator
Laser ON
Alignment
Laser OK
Output
Mode
In the Laser Touch Probe the Ready signal is bridged.
Checking the
This means that the Ready signal must always be present if a laser touch probe is connected.
"Ready" bridge
Proceed as follows to check the Ready bridge:
Assignment at the interface X13 (D-SUB, 9-pin, 2-row):
MC 42x(B)
Female
1
2
3
4
5
6
7
8
9
–
Hsg.
July 2010
Disconnect the touch probe and observe the reaction. -->
See "Deselecting and Disconnecting the Touch Probe" on page 25 – 426.
DANGER
Laser radiation! Do not stare into the beam! Laser class 2.
DANGER
Laser radiation! Do not stare into the beam! Laser class 2.
Shut down the control and switch off the machine.
Disconnect the keypad cable on connector X13 from the MC.
Use a multimeter which you set to "beep" mode or to ohm measurement.
Apply the needle tips to the pins 1 and 4 of the touch probe cable. --> A beep must be heard
or a low ohmic value displayed.
Assignment X13 (TT)
Readiness
0 V (U
Do not assign
+15 V ±5% (U
Do not assign
Do not assign
+5 V ±5% (U
Trigger signal
Trigger signal
–
External shield
LED Function
Green Input for enabling transmission
Green Laser adjustment OK (signal > 95 %)
Green Laser output OK (signal > 75 %)
Red DYN output (signal > 50 %)
White Operating mode 0
Green Operating mode 1
Red Operating mode 2
Yellow Operating mode 3
)
N
)
P
)
P
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