
B–64113EN–1/01
9. SPINDLE SPEED FUNCTION
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An S command is sent as a speed command to each spindle selected, using
a spindle selection signal (SWS1 to SWS3 <G027#0 to #2>). 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 *SSTP3 <G027#3
to #5>) 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 and ENB3 <F038#2 and #3>
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 to third spindles.
The PMC-based polarity (rotation direction) control signals SGN and
SSIN <G033#5,#6> will function for any spindle selected by SWS1 to
SWS3.
The concept of Type A multi-spindle control is outlined below.
S command
Hold 1
Hold 2
Hold 3
First spindle
SIND
SWS 1
SWS 2
SWS 3
* SSTP 1
* SSTP 2
* SSTP 3
Second spindle
Third spindle
NOTE
When using an analog spindle, the third spindle is selected.
In this case, the second spindle cannot be used.
Basic control (Common
to TYPE-A and TYPE-B)
Multi-spindle control
(TYPE-A)