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GSK980TDi Turning CNC System User Manual
138
Ⅰ
Programming
M15
；
//switch
the
spindle
from
position control mode to speed control mode
．．
．．；
//execution
the
2
nd
machining procedure
．．
．．；
M30
；
//end
of
program
3.23.3 Arc Threading Cutting Code G32.2 or G32.3
Code format:
G32.2
X(U)__ Z(W)__ R__ (I__ K__) F__ Q__
G32.3
Code function:
The movement path of arc thread is a section of arc from start to end; The
coordinate axis with bigger shifting value where from the start to end is regarded as
long axis; the other one is called short axis. The long axis moves a lead while the
spindle rotates one cycle during the operation. A constant pitch helical slot generates
on the workpiece surface when the tool cuts the workpiece, so that the constant pitch
thread machining is carried out. The F command is used for the provided thread pitch,
the arc thread machining of the constant pitch can be performed by executing the
G32.2
／
G32.3 command.
Code explanations:
1) G32.2/G32.3 is modal
；
2) The leading of the thread is the displacement value (The displacement value along X axis
is based upon the radius value) of one cycle for the spindle.
3) When bit 7 of parameter No.202 is set to 0, arc thread follows with the feedback signal of
spindle encoder; when the bit 7 of the state parameter No.202 is 1, arc thread cutting feed
is performed the linkage interpolation with the servo spindle; in this case, the spindle,
there is not alternative other than the servo spindle;
4) G32.2 CW arc thread machining, G32.3 CCW arc thread machining; the judgement
methods for the CW, CCW and G02, G03 arc maching command are identical;
Q use rules:
1) When the bit 7 of state parameter No. 202 sets to 1, Q value is disabled; in this case, the
start angle of the thread can be directly specified by C address;
2) If the Q does not specify, namely, it is regarded as start angle 0 by default;
3) The overall threads of the mult-pitch formed by start angle indexing should be less than
65535.
4) Q’s unit is 0.001 degree, if it offsets 180 degree to the spindle one-turn signal, input
Q180000 to the program; if the Q180 or Q180.0 is input, it separately regards as 0.18
degree.
The schematic of the command execution path is shown below:
