Mitsubishi Electric MELDAS C6 Programming Manual page 165

13. Program Support Functions
This function allows spindle acceleration/deceleration pattern to be approached to the
speed loop acceleration/deceleration pattern by dividing the spindle and drilling axis
acceleration/deceleration pattern into up to three stages during synchronous tapping.
The acceleration/deceleration pattern can be set up to three stages for each gear.
When returning from the hole bottom, rapid return is possible depending on the spindle
rotation speed during return. The spindle rotation speed during return is held as modal
information.
(i) When tap rotation speed < spindle rotation speed during return ≤ synchronous tap
changeover spindle rotation speed 2
S
S'
S1
S2
Smax : Maximum rotation speed (spindle base specification parameters #3005 to
T1
T2
Smax
S2
S(S1)
T1
S1
S'
S2
Smax
: Command spindle rotation speed
: Spindle rotation speed during return
: Tap rotation speed (spindle base specification parameters #3013 to #3016)
: Synchronous tap changeover spindle rotation speed 2
(spindle base specification parameters #3037 to #3040)
#3008)
: Tap time constant (spindle base specification parameters #3017 to #3020)
: Synchronous tap changeover time constant 2
(spindle base specification parameters #3041 to #3044)
157
13.1 Canned cycles
T1
T1
T2
T2
T1