Programming instructions

ADT-CNC4620 Programming Manual

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immediately.

3.3.2. Z axis taping cycle G33

Instruction format: G33 Z(W)__ F__;

Instruction function: the motion track of the tool is from the start point to the end point, and

then returns to the start point. During the motion, Z axis moves a pitch when

principal axis rotates one circle, always keeps consistent with the pitch of the thread,

forms a spiral grooving in the internal hole of the workpiece, and completes the

thread processing of the internal hole after once cutting.

Instruction description: G33 is modal G instruction;

Z(W): do not enter Z or W, the Z coordinates of the start point and end point are

same, and do not execute thread cutting;

F: metric thread pitch, range: 0.001~500 mm;

Cycle process:

① Z axis feeding and taping (principal axis must be specified to ON before G33

instruction);

② M05 signal outputs after reaching the Z axis coordinate end specified by the program;

③ Principal axis stops completely;

④ Principal axis reverse signal output (opposite to original rotation of the principal

axis);

⑤ Z axis back to the start point;

⑥ Principal axis resumes the turning before G33.

Program:

O0011;

G00 Z90 X0Z0 M03; start the principal axis

G33 -Z50 F1.5; taping cycle

G00 X60 Z10; continue processing

M30

Note 1: before taping, determine the principal axis according to the rotation of the thread, and the

principal axis will resume original rotation after taping.

Note 2: this instruction is rigid taping; when principal axis stop signal is valid, the principal axis

stops rotation after a period of deceleration, and Z axis will feed following the rotation of the

principal axis at this moment, until the principal stops completely, and therefore, the bottom

hole position of the thread is deeper than actual required position during actual processing;

the specific exceeded length depends on the principal axis rotation and principal axis brake

device during taping.

Note 3: during taping cutting, the moving speed of Z axis depends on the principal axis rotation and

pitch, and isn’t related to cutting feeding speed ratio.

Note 4: during single block running or feeding maintenance operation, the system displays “Pause”,

taping cycle doesn’t stop, until taping completes and returns to the start point.

Note 5: when the system is reset, stopped in emergency or alarms, taping cutting decelerates to stop.

3.4. Workpiece coordinate system setting G50

Instruction format: G50 X _ Z _ ;