5. TEST OPERATION
A programmed feedrate can be reduced or increased by a percentage (%)
selected by the override dial. This feature is used to check a program.
For example, when a feedrate of 100 mm/min is specified in the program,
setting the override dial to 50% moves the tool at 50 mm/min.
Check the machining
by altering the feedrate
from the value speci-
fied in the program.
Feedrate 100 mm/min
(Specified by programmed)
Feedrate 50 mm/min after
Fig. 5.2 Feedrate override
Procedure for Feedrate Override
Set the feedrate override dial to the desired percentage (%) on the
machine operator’s panel, before or during automatic operation.
On some machines, the same dial is used for the feedrate override dial
and manual continuous feedrate dial. Refer to the appropriate manual
provided by the machine tool builder for feedrate override.
The override that can be specified ranges from 0 to 254%. For individual
machines, the range depends on the specifications of the machine tool
During threading, the override is ignored and the feedrate remains as
specified by program.
OG FEED RATE OVERRIDE
D Override Range
D Override during thread