HEIDENHAIN ITNC 530 - Page 404

24 – 404 HEIDENHAIN Service Manual iTNC 530
All keys are evaluated by the NC. Certain keys are mapped to markers.
Keys that are not mapped in markers can be checked easily by controlling if a function is called
by pressing the corresponding key or if there is a reaction on the screen.
Checking the
potentiometers
By means of W494 you can check the function of the feed-rate override potentiometer,
and by means of W492 the function of the spindle-override potentiometer:
8 Switch on the machine.
8 Press the EMERGENCY STOP key.
8 Activate the HR 420 (press the handwheel symbol on the HR 420). -->
The window Handwheel active appears on the screen.
8 Activate the handwheel potentiometers (as of NC software version 34049x-xx, see next page).
8 Call the PLC table for the words.
--> See “The TABLE function” on page 11 – 119.
8 Place the cursor on W492 or W494 (e.g., GOTO 492).
8 Select the decimal display (soft key).
8 Turn the potentiometer to be examined.
8 Check if the display can be changed from 0 to 10000 (with nonlinear characteristic curve) or 0
to 100 (with linear characteristic curve).
The characteristic curve is defined in MP 7620 bit 3.
F1 F2 F3 F4 F5
XYZIVV
↑
Hand-
wheel
active
(M4660)
↓
–
(M4667)
Rapid
traverse
(M4663)
+
(M4666)
Spindle
Start
(M4664)
Actual
position
capture
NC start
(M4661)
Spindle
Stop
(M4665)
CTRL
(M4668)
NC Stop
(M4662)
Note
These PLC words can also be shown in the integrated oscilloscope.
--> See “Checking the Potentiometers” on page 22 – 367.