
4
4. PROGRAM FORMAT
88
Program format T series M series
G26PpQqRr ; spindle fluctuation detection on
G25 ; Spindle fluctuation detection off
p: Time (in ms) from the issue of a new spindle
rotation command (S command) to the start of
checking whether the actual spindle speed is so
fast that an overheat can occur.
(When a specified speed is reached within the
time period of P, a check is started at that time.)
q : Tolerance (%) of a specified spindle speed (if a
specified spindle speed lies within this range, it is
regarded as having reached the specified value.
Then, the checking of an actual spindle speed is
started.)
q= (1– actual spindle speed/specified spindle
speed) 100
r : Spindle speed fluctuation (%) at which the actual
spindle speed is so fast that an overheat can oc-
cur
r= (1–speed that can cause overheat/specified
spindle speed) 100
f f
G27 _ ;
IP
f f
G28 _ ;
P2
G30 P3 _ ;
P4
G30.1 _ ;
IP
IP
IP
P2: 2nd reference position return
P3: 3rd reference position return
P4: 4th reference position return
f f
G29 _ ;
IP
f