HEIDENHAIN TNC 151 Q - External Direction Buttons and Feed Rate Potentiometer

3.8 External direction buttons and external feed rate potentiometer
Inputs PLC-Allocation TNC 151 B /
TNC 155 B
Multipoint
connector
I
TNC 151 Q/
TNC 151 Q /
TNC 155 Q
TNC 155 Q
Multiipoint
Multipoint
connector connector
PLC-Power board control
X + direction
x- “
J6/5
J4/3
-
J6/6
J4/2
-
y+”
J6/7 J5/12
-
y- ‘I
J6/8 J5/1 ‘I
-
z + ”
El3
z - ”
El4
IV + ”
El5
IV - “
El6
J6/9 J5/10
-
J6/10
J5/9
-
--
J6/11 J5/8
-
J6/12
J5/7
-
ext. Potentiometer + 12 V
-
J3/6
-
J3/2
l, I,
brush-contact -
J3/8
-
J3/3
I, I,
ov
-
J3/9
-
J3/4
By applying the 24 volt control voltage via an external direction button, the relevant machine axis can be
traversed in the modes: MANUAL OPERATION, ELECTRONIC HANDWHEEL and
PROGRAMMING AND EDITING. The max. speed for each axis is programmed separately via machine
parameters 4 to 7.
A feed rate display F is provided in the display screen. This display operates in acoordance with machine para-
meter 167 either after the start of one axis via display or with the same max. feed rate in all axes prior to start.
Machine parameter 74 determines whether the feed rate is output in 2 % stages or variable.
Caution:
With F-display prior to start, the control sets the smallest programmed speed in MP4 to MP7 for all axes.
With a further machine parameter MP66, the input of another existing external feed rate potentiometer can be
activated. If no external feed rate potentiometer is used, the feed rate for the direction buttons can be set via
the override potentiometer. The rapid traverse button is active with one or sever-al direction buttons.
If the external
0
START-button is pressed while one or more direction buttons are held depressed, the traversing
directions are memorised depending on the programming of machine parameter MP 68. This motion can be
stopped via the external
0
STOP -button.
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