Well, I tried this, and the f codes were ignored. Reading the programming manual, I came across this (most examples given for plasma, but same programs are used on waterjet):
"F FEED RATE
Programmed Feedrate provides feedrate changes
during automatic program execution. "F" followed
by the feedrate in inches per minute will cause a
feedrate change upon execution of this block.
Operator override of feedrate is still functional.
EIA FORMAT: Fnnn
ESSI FORMAT: 39+nnn
The following program cuts a 10 x 10 inch square
with a 4 inch hole in the center. The hole is cut at
75 inches per minute, the square is cut at 100
inches per minute.
EXAMPLE
G91 Incremental Mode
G00 X5.0 Y-6.5 Rapid move to 1st pierce point
F75 Set Feed rate at 75 IPM
M65 Plasma On
G03 J-.25 Lead In
G03 J2.0 Cut Circle
G03 J.25 Lead Out
M66 Plasma Off
G00 X-5.5 Y6.5 Rapid move to 2nd pierce point
F100 Set Feed rate at 100 IPM
M65 Plasma On
G01 X10.5 Cut Square
Y-10.0 .
X-10.0 .
Y10.5 .
M66 Plasma Off
So maybe the f code has to be inserted when the machine is "down"? and cannot work to change speeds of a cut in progress?  |