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.
By means of W494 you can check the function of the feed-rate override potentiometer,
Checking the
and by means of W492 the function of the spindle-override potentiometer:
potentiometers
24 – 404
F1
X
Switch on the machine.
Press the EMERGENCY STOP key.
Activate the HR 420 (press the handwheel symbol on the HR 420). -->
The window Handwheel active appears on the screen.
Activate the handwheel potentiometers (as of NC software version 34049x-xx, see next page).
Call the PLC table for the words.
--> See "The TABLE function" on page 11 – 119.
Place the cursor on W492 or W494 (e.g., GOTO 492).
Select the decimal display (soft key).
Turn the potentiometer to be examined.
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.
Note
These PLC words can also be shown in the integrated oscilloscope.
--> See "Checking the Potentiometers" on page 22 – 367.
F2
F3
Y
Z
Hand-
↑
wheel
active
(M4660)
–
Rapid
traverse
(M4667)
(M4666)
(M4663)
Spindle
Actual
NC start
Start
position
(M4661)
(M4664)
capture
Spindle
NC Stop
CTRL
Stop
(M4662)
(M4668)
(M4665)
HEIDENHAIN Service Manual iTNC 530
F4
F5
IV
V
↓
+