HEIDENHAIN TNC 306 Service Manual - Manual (Page 55)

SERVICE MANUAL TNC 306/360
Page 48
HEIDENHAIN Service
12. Handwheel HR 130/330
12.1 Overview
HR 130 Id.No. 254 040 --
HR 130.001 Id.No. 249 371 --
HR 330
Id.No. 251 534 -- Cable adaptor for HR 330
Id.No. 249 889 --
12.2 Checking the Handwheel HR 130/330
12.3 Error Messages
HANDWHEEL?
The data transfer (cable) has been interrupted.
HANDWHEEL DEFECTIVE
The light unit in the electronic handwheel is not emitting enough light, with the result that
the signals in the handwheel are too small. An error signal is sent over the serial interface
of the handwheel.
Pin Color Signal
1
2
3
4
5
6 bl
bl
gn
ye
br
wh
EM.
STOP
RxD
DTR
+12V
0V
Pin Color Signal
1
4
6
8 wh
br
ye
gn
0V
+12V
DTR
RxD
The serial handwheels HR 130 and HR
330 can only be tested with an
oscilloscope. The control signals (X11
PIN6 = DTR, PIN8 = RxD) must
correspond to the diagram at the left.
The supply voltage for the handwheel
is fed via the logic unit (X11, PIN2
= 0V, PIN4 = + 12V).
t = 6 ms