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GSK980TDi Turning CNC System User Manual
34
Ⅰ
Programming
Fig. 2-4
In G96, the spindle speed is changed along with the absolute value of X absolute coordinates
value of programming path in cutting feed (interpolation), but it is not changed in G00 because there
is no actual cutting and is counted based on the surface speed of end point in the program block.
In G96 (constant surface speed control), Z coordinates axis of workpiece system must consist
with the axes of spindle (rotary axis of workpiece), otherwise, there is different between the actual
surface speed and the defined one.
G96 control is valid, G50 S_ can limit max. spindle speed (r/min). The spindle actual speed is the
limit value of max. speed when the spindle speed counted by the surface speed and X coordinates
value is more than the max. spindle speed set by G50 S_. After the system powers on, max. spindle
speed limit value is not defined and its function is invalid. Max. spindle speed limit value defined by
G50 S_ is reserved before it is defined again and its function is valid in G96. Max. spindle speed
defined by G50 S_ is invalid in G97 but its limit value is reserved.
Note: When NO.043 (lowest spindle speed in constant surface speed control) is set to 0 and G50 S0 is
executed, the spindle speed is limited to 0 r/min (the spindle does not rotate).
When the constant surface speed is controlled by the system parameter No.043, the spindle
speed is lower limit, which is higher than one counted by the surface speed and X axis coordinates
value.
Example:
Fig. 2-5
