July 2013 8.1 Display and operation 1155
Feed rate display 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:
Enter the desired percentage in W766. The NC immediately takes over the
new value.
Machine parameter MP7620 bit 3 and bit 4 is used to configure the
characteristic curve and the behavior of the spindle-speed override and feed-
rate override. If bit 3 is not set (= 0), the feed-rate and spindle potentiometers
are now available as a linear characteristic curve. On TE keyboard units
without rapid-traverse override, bit 4 serves to additionally select the
resolution used for the evaluation of the overrides.
The rapid-traverse override cannot be configured and is always evaluated with
a non-linear characteristic curve in steps from 0 to 15000.
Behavior of MP7620 bit 3 on TEs without rapid-traverse override:
0: Linear characteristic curve for spindle override and feed rate override; unit
depends on bit 4 0..150 or 0..15000
1: Non-linear characteristic curve for spindle override and feed rate override,
unit 0..15000
Behavior of MP7620 bit 4 on TEs without rapid-traverse override:
0: Spindle override and feed rate override with unit 0 to 150
1: Spindle override and feed rate override in steps from 0 to 15000
Behavior of MP7620 bit 3 on TEs with rapid-traverse override:
0: Linear characteristic curve for spindle-speed and feed-rate override, in steps
from 0 to 15000
1: Non-linear characteristic curve for spindle override and feed rate override, in
steps from 0 to 15000
Behavior of MP7620 bit 4 on TEs with rapid-traverse override:
No effect
The feed-rate override is effective either in 1% steps or according to a
nonlinear characteristic curve:
With MP7620 bit 3, select the mode of the override.
Value range in W494 and W766:
1% steps: 1 to 150
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%
If bit 3 of MP7620 is set, then, due to the nonlinear characteristic curve, the
labeling of the override only matches the actual value at the 0% and 100%
positions.
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