The G96 function, which provides a constant-speed cutting operation, has been incorporated in the ADV 2006 version of the TB-DECO. The function is associated with G92 and G97 and is described in the programming help of the TB-DECO ADV 2006 software package.

Specific application for single spindles machines

An interesting case regarding the use of G96 is part cutting at a constant cutting speed, especially for large bar diameters (DECO 20, 26). It is also very useful to have this function when carrying out initial cutting following a RESET and whilst the new bar is being cut by the macro G914. This article describes how to adapt an existing part program so that bar cutting can be executed with G96 in active mode, in the following three cases:

a. following a RESET in the INIT program ( G910 ),
b. for each cycle, during the part cutting operation,
c. when cutting the new bar ( G914 ).

1. Following a RESET in the INIT program (G910)

Steps to be taken to execute the initial cut in constant cutting speed mode G96:

1a. Open the INIT program.



1b. Search for the operation containing the G910 macro (generally last operation of the 1st line of operation).



1c. Modify the ISO code as shown below:


The code G92 limits the maximum spindle speed. The cutting speed is indicated in [m/min] or [feet/min] in the S-instruction according to G96.

2. For each cycle, during the part cutting operation

2a. In the main program, open the cutting operation (in our example 1:9) and enter the following ISO code





2b. The M103 S2000 control on the last ISO code line is necessary to prevent any looping error for spindle S1. The value must correspond to that featuring in the window «initial spindle speed» for S1.

   3rd icon from the left

Tip: Using G96 means that you can dispense with using the G904 macro that was hitherto prescribed for part cutting at a constant, pseudo cutting speed.

3. When cutting the new bar (G914)

In order to cut the new bar at a constant cutting speed, after loading via the bar-feeder, macro G914 has undergone adaptation. A new parameter, P5, is available:

P5 = Cutting the new bar at a constant cutting speed. If P5=1 actuation of G96 for cutting the new bar at a constant cutting speed. The cutting speed in [m/min] or [feet/min] will be entered in parameter P4.

Steps to be taken to cut a new bar in constant cutting speed mode, G96:

3a. Open the NEW_BAR program
3b. Open operation 1:1 containing the G914 macro
3c. Modify the ISO code as shown below:



The G92 code limits the maximum spindle speed. The cutting speed is indicated in [m/min] or [feet/min] in the S-instruction according to G96.

Remark: Consult programming aids for functions G92, G96 and G97 and G914 of TB-DECO in addition to the above article.