13. Program Support Functions
13.1 Fixed Cycles
262
(ii) When synchronous tap changeover spindle rotation speed 2 < spindle rotation speed
during
return
Smax
S2
S(S1)
S1
S2
S'(Smax)
T1
T2
T1
T1
T1
T2
T3
T3
S
: Command spindle rotation speed
S'
: Spindle rotation speed during return
S1
: Tap rotation speed (spindle base specification parameters #3013 to #3016)
S2
: Synchronous tap changeover spindle rotation speed 2
(spindle base specification parameters #3037 to #3040)
Smax : Maximum rotation speed (spindle base specification parameters #3005 to
#3008)
T1
: Tap time constant (spindle base specification parameters #3017 to #3020)
T2
: Synchronous tap changeover time constant 2
(spindle base specification parameters #3041 to #3044)
T3
: Synchronous tap changeover time constant 3
(spindle base specification parameters #3045 to #3048)