
B–63503EN–1/01
9. SPINDLE SPEED FUNCTION
435
In addition to the conventional (first) spindle, another (second) spindle
can be controlled. These additional spindles allow two-stage gear
changes. An S code is used for a command to any of these spindles; which
spindle is selected is determined by a signal from the PMC. The second
spindle can change gears in 2 stages.
Also, the maximum spindle speed can be set to each spindle to clamp the
spindle speed of each spindle (set by parameters No. 3772 and 3802).
When the second spindle is used, one position coder interface channel is
added. Which position coder is selected is determined by a PMC signal.
(The conventional and additional position coders are referred to as the
first position coder and second position coder, respectively, throughout
the remainder of this discussion.)
Selection between 1st position coder and 2nd position coder is made by
a signal from PMC.
The spindle serial output option is required to use multi-spindle control.
Two multi-spindle control methods are available. Type A allows the
SIND function (controlling the spindle motor speed based on the PMC)
to be used only for the first spindle. Type B allows the SIND function to
be used for each of the two spindles independently.
An S command is sent as a speed command to each spindle selected, using
a spindle selection signal (SWS1 to SWS2 <G027#0-#1>). Each spindle
rotates at the specified speed. If a spindle is not sent a spindle selection
signal, it continues to rotate at its previous speed. This allows the spindles
to rotate at different speeds at the same time.
Each spindle also has a spindle stop signal (*SSTP1 to *SSTP2
<G027#3-#4>) to stop its rotation; an unused spindle can still be stopped.
There is a spindle enable signal to control each spindle; ENB <F001#4>
controls the first spindle, while ENB2 <F038#2> control the second and
third spindles, respectively.
The PMC signal PC2SLC <G028#7> is used to select between the first
and second position coders.
When parameter MSI (No. 3709#2)=0, TYPE-A is used.
When the first spindle is selected with the SWS1 signal, the SIND signal
<G033#7> is used to determine whether the spindle analog voltage is
controlled by the PMC or CNC; then signals R01I to R12I <G0033#3 to
G0032#0> are used to set that spindle’s analog voltage. These signals do
not affect the second spindle.
9.9
MULTI–SPINDLE
CONTROL (T SERIES)
General
Control
Basic control (Common
to TYPE-A and TYPE-B)
Multi-spindle control
(TYPE-A)