Feed Rate Display - HEIDENHAIN TNC 415 Technical Manual

6.4.3 Feed rate display

In the operating modes "Program run/single block" and "Program run/full sequence" the programmed
contour feed-rate is displayed when the feed-potentiometer is in the 100 % position. The Feed-
Potentiometer can be used to vary this programmed feed-rate from 0 to 150 %.
If rapid traverse was programmed, this is indicated in the display with FMAX and marker M2151 is
set.
With machine parameter MP7620 you can set whether the feed rate override is active in 1% steps
or according to a non-linear curve. The non-linear override curve permits fine a resolution in the
lower range of the potentiometer.
The override values are shown in the PLC in word W766 and W494. If the PLC program overwrites a
value in W766, it will become active regardless of the potentiometer setting. For 1% steps the value
range is 0 to 150, for a non linear curve it is 0 to 15 000, corresponding to 0 to 150%.
In the manual operating modes the axis feed-rate is displayed, not the contour feed-rate.
There is a choice of two display modes:
– The axis-specific feed-rate from machine parameter MP1020.X is only displayed after pressing
an axis-direction key. If two axis-direction keys are pressed simultaneously no feed-rate will be
shown.
– Even when none of the axis-direction keys is operated one feed-rate will be displayed, which
can also be adjusted by the feed-potentiometer. The smallest feed-rate from MP 1020.X is valid
for all axes. The axis feed-rate will also be shown if several axis-direction keys are pressed
simultaneously.
MP7270 Display of the feed-rates in manual operating modes (Manual operation,
Electronic handwheel)
Entry: 0 or 1
0 = display of the axis feed-rate only when an axis-direction key is pressed
(axis-specific feed from MP1020.X)
1 = display of the axis feed-rate before operating an axis-direction key
(smallest value from MP1020.X for all axes)
MP7620 Feed rate and spindle override
Entry: 0 to 11
Bit 3
Address Function
%-factor feed rate override (NC → PLC)
W494
%-factor feed rate override (PLC → NC)
W766
Marker Function
M2151 Rapid traverse programmed (FMAX)
4-138 TNC 407/TNC 415/TNC 425
Characteristic curve for linear or non-linear override
+0 = Override linear in 1% steps
+8 = Override non-linear
6 Display and operation
Set Reset
NC NC
01.98