
B–63173EN–1/01
9. SPINDLE SPEED FUNCTION
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D When Gear select signal change
Gear select signal
SF
S code read
0V
TFIN
TMF
TM
F
To next block
FIN
V
L
Spindle speed command
V
H
GR3O
/GR2O
/GR1O
Fig. 9.3 (e) Time chart when gear select signal changes
In this case, the gear select signal is output; after elapse of the time
constant set by parameter (TMF), the SF signal is output. After another
TMF elapse, the spindle speed command is output. On the PMC side,
change the gears by this signal, and return the FIN signal after the end of
gear change. The time chart for SF and FIN signals is the same as in S
code output.TMF, set by parameter No. 3010, is common to M, S and T
functions.
Moreover, specifying bit 6 (SFA) of parameter No. 3705 can specify that
the SF signal be output even if no gear change is used.
To perform the T type gear changing, the maximum spindle speed for each
gear select signal issued from the PMC side must be set by parameter No.
3741-3744.
The gear select signal is a 2 bit code signal (GR1, GR2). The relationship
between the signal and gear number is :
GR1 GR2 Gear No.
Parameter No. for max.
spindle speed
0 0 1 No. 3741
1 0 2 No. 3742
0 1 3 No. 3743
1 1 4 No. 3744
The following descriptions exemplify the analog spindle. Like the
descriptions of the M type, they also apply to the serial spindle on the
assumption that spindle motor speed with analog voltage 10 V
corresponds to the maximum spindle motor speed.
D Details of T type
(Input of GR1, GR2)