1. SPINDLE SPEED FUNCTION
(For the Power Mate i–D/D2)
G96 (constant surface speed control command) is a modal G code. After
a G96 command is specified, the program enters the constant surface
speed control mode (G96 mode) and specified S values are assumed as a
surface speed. A G96 command must specify the axis along which
constant surface speed control is applied. A G97 command cancels the
G96 mode.When constant surface speed control is applied, a spindle
speed higher than the value specified in G92S_; (maximum spindle
speed) is clamped at the maximum spindle speed.
When the power is turned on, the maximum spindle speed
is not yet set and the speed is not clamped.
S (surface speed) commands in the G96 mode are assumed as S = 0 (the
surface speed is 0) until M03 (rotating the spindle in the positive
direction) or M04 (rotating the spindle in the negative direction) appears
in the program.
The spindle speed (min
coincides with the surface speed
(m/min) at approx. 160 mm (radius).
S is 600 m/min.
Radius of work
Spindle speed (min
Fig.1.3 (a) Relation between workpiece radius,
spindle speed and surface speed
Constant surface speed
control command (G96)