Contour Statements

The G61 function can be used for temporarily stopping the block preparation of the interpreter. This means that the interpretation of the next block is stopped until the last block in the coarse interpolator’s job buffer has been processed.

In Laser technology, each contour is processed with some lead-in for better finish of the contour. It is possible to process the lead-in length with different laser parameters and it is activated via cutting method as explained above.

The lead-in length value is stored in the P-fields and for better understanding the P- field is globally declared internally in the program as follows:

#globdef Lead_In P1908

In Laser technology, the width of the beam diameter need to be compensated in order to achieve the perfect dimensions of the contour. Depends on the size of contour defined in the program, the kerf will be changed.

The Kerf-width value is stored in the P-fields and for better understanding the P- field is globally declared internally in the program as follows:

#globdef Kerf P1300

The approach contour starts the actual motion of the axis and use the rapid traverse command G0 or Linear command G1 to position the axis to the piercing point. During this motion, the head is positioned along with the tool offset value (kerf width) The approach point can be reached with single statement by simultaneous interpolation of the axis, there may be a case where it may take more than one statement is also possible.

The Laser ON function is called via M-command “M14”. The call of M14 will activate the following functions:

The complete set of contour statements between M14 & M15 constitutes the process contour, where the actual laser technology take place. It is possible to identify the Acc/Dec phase, Corner, End of approach etc., for the complete process of contour.

Also, before the start of contour statements, it is possible to define the type of process as Cutting/Marking for DIN program display in HMI as dashed lines. Please refer Graphical Element topic for more details.

The Laser OFF function is called via M-command “M15”. The call of M15 will activate the following functions:

No other M-function must be set before a M15. The M15 must always be set after a positioning block/contour block.

The activated Kerf compensation at the start of contour need to be cancelled at the end in order to position the head for the next contour without compensation.