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Feed-rate display
6 – 236
The programmed contour feed rate is displayed in the PROGRAM RUN,
SINGLE BLOCK and PROGRAM RUN, FULL SEQUENCE operating modes.
With the feed-rate potentiometer you can change the feed rate from 0 to
150%.
If rapid traverse was programmed, FMAX is displayed and M4180 is set.
The percentage adjusted with the feed-rate override is entered by the NC in
W494 and W766.
You can change the percentage through the PLC:
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Enter the desired percentage in W766. The NC immediately takes over the
new value.
The feed-rate override functions either in 1% steps or according to a nonlinear
characteristic curve:
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With MP7620, bit 3, select the mode of the override.
Value range in W494 and W766:
n
1% steps: 1 to 150
n
Nonlinear characteristic curve: 0 to 15 000
In the lowest range, 0.01% steps are available. Beginning with a value of
2.5%, the step is 0.75%.
In the manual modes of operation the axis feed rate is shown instead of the
contouring feed rate.
You can choose between two types of display:
n
The axis feed rate is shown after you press an axis-direction key. If two keys
are pressed simultaneously, no feed rate is displayed.
n
If no key is pressed, the smallest axis feed rate is always shown. The PLC
axes are not included in the selection of the smallest feed rate. If more than
one key is pressed simultaneously, a feed rate is also displayed.
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Define the type of display in MP7270.
HEIDENHAIN Technical Manual TNC 426, TNC 430
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