
B–61863E/15
5. FUNCTIONAL INSTRUCTIONS
PMC SEQUENCE PROGRAM
339
Then, the spindle control parameters are set as follows:
D10 toD13 204 Lower spindle motor speed limit data
D14 to D17 7167 Upper spindle motor speed limit data
D18 to D21 25000 Maximum spindle speed for gear 1
D22 to D25 40000 Maximum spindle speed for gear 2
D26 to D29 60000 Maximum spindle speed for gear 3
D30 to D33 100000 Maximum spindle speed for gear 4
(4) Calculate the spindle motor rotation command for the spindle
speed
Maximum motor speed (8191)
Lower limit at which the motor
speed is clamped
(7167)
Lower limit at which the motor
speed is clamped
GR1 GR2 GR3 GR4
Spindle speed
(min
–1
)
(204)
Maximum
spindle speed
for GR1 (25000)
Maximum
spindle speed
for GR2
(40000)
Maximum spindle
speed for GR3
(60000)
Maximum spindle
speed for GR4
(100000)
From the above graph, the following table can be obtained:
Table 5.63.5 Maximum and Minimum spindle speeds for each gear
Minimum spindle speed
(min
–1
)
Maximum spindle speed
(min
–1
)
GR1 622 21874
GR2 21875 34999
GR3 35000 52499
GR4 52500 87498
(When CIRC = 0, OVRD = 0)
Thus, if the spindle speed data is 55000 (min
–1
), when the spindle
override is not applied (OVRD = 0) and the direct gear
specification is not set (CIRC = 0), the spindle motor rotation
command and the spindle gear to be used are obtained as follows:
R0 to R1 Spindle motor rotation command
4505
R2 8 (GR4) Spindle gear selection