8. SPINDLE FUNCTIONS
(ONLY FOR Power Mate–D)
B–63172EN/01
NC FUNCTION
54
Whether to perform constant surface speed control is specified using G96
or G97.
G96 : Constant surface speed control mode
G97 : Constant surface speed control cancel mode
If the surface speed is specified with an S code (S followed by a numeric
value) in the constant surface speed control mode, the spindle speed is
controlled so that a constant surface speed can be maintained while the
tool position is changing.
The axis on which the calculation for constant surface speed control is
based can be specified with either a parameter or the following command:
G96 Pα ; P0 : Axis specified with a parameter
Pα : αth axis (α = 1 to 2)
The specifiable range of the S code is as follows:
1 to 99999 m/min or feet/min
In the constant surface speed control cancel mode, the spindle speed is
specified using an S code.
In the constant surface speed control mode, a constant surface speed
control on signal is output.
By specifying the following command, the maximum spindle speed can
be set:
G92 S_ ; (where, S-- is the maximum spindle speed in rpm)
The spindle speed is clamped when it reaches the specified maximum
spindle speed.
To the spindle speed specified by S, an override from 0% to 254% can be
applied (in steps of 1%).
The spindle orientation function stops the spindle at a certain position.
You can perform spindle orientation simply by mounting a position coder
on the spindle. Stoppers or pins for physically stopping the spindle at a
specified position are not necessary. A spindle can be instantly oriented,
even when rotating at high speed, thereby greatly reducing the orientation
time.
Spindle output switching switches between the two windings, one for low
speed and the other for high speed, incorporated into the special spindle
motors. This ensures that the spindle motor demonstrates stable output
characteristics over a wide range.
8.5
CONSTANT
SURFACE SPEED
CONTROL
8.6
SPINDLE OVERRIDE
8.7
SPINDLE
ORIENTATION
8.8
SPINDLE OUTPUT
SWITCHING