4. INTERPOLATION FUNCTIONS
Using the Q address to specify an angle between the one–spindle–rotation
signal and the start of threading shifts the threading start angle, making
it possible to produce multiple–thread screws with ease.
_ : End point
F_ : Lead in longitudinal direction
Q_ : Threading start angle
G32 IP_ F_ Q_ ;
G32 IP_ Q_ ;
G32: Constant–lead thread cutting
G34: Variable–lead thread cutting
G76: Multiple–thread cutting cycle
G92: Thread cutting cycle
The start angle is not a continuous–state (modal) value. It must be
specified each time it is used. If a value is not specified, 0 is assumed.
The start angle (Q) increment is 0.001 degrees. Note that no decimal point
can be specified.
For a shift angle of 180 degrees, specify Q180000.
Q180.000 cannot be specified, because it contains a decimal point.
A start angle (Q) of between 0 and 360000 (in 0.001–degree units) can be
specified. If a value greater than 360000 (360 degrees) is specified, it is
rounded down to 360000 (360 degrees).
For the G76 multiple–thread cutting command, always use the FS15 tape
D Available thread cutting
D Start angle
Start angle increment
D Specifiable start angle
D Multiple–thread cutting