NCT Group NCT 2000T, NCT 100T, NCT 990T manual Interrupting Canned Cycles

2nd part block:

13.3Unconditional Restart of Automatic Operation

2nd case: in state G40 interrupting oblique linear interpolation Let us examine fragments of the following sample programs:

Program No. 1:			Program No. 2:
...	G90	G0 X20 Z–10	...	G90	G0 X20 Z–10
N40			N40
N50	X80	Z–60	N50	G91	X60 Z–50
N60	Z–85		N60	Z–25
...			...

Programs No. 1 and 2 are on the same

tool path, however the data specifica- tion of the former one is absolute,

while that of the latter one is

incremental. The interruption occurs in block N50. In position X=44, Z=–30

the movement is stopped, the automatic mode is interrupted and the axes are carried to position X=110,

Z=–30 by means of manual operation.

If afterwards the automatic mode is re- turned, and the START button is

pressed the movement programmed in block N50 is finished. Axes X and Z move along oblique straight from their momentary state to the position X=80, Z=–60 programmed, no matter if the tool path has been written by the use of absolute data specification (program No. 1) or incremental data specification (program No.2).

The movement is the same, if in single block mode the automatic mode is closed in the start position of block N50, manual operation is used, than after return the START button is pressed.

Interrupting Canned Cycles

Let us examine the following cycle:

...

G17 G90 G81 X100 Y70 Z–60 R2 F200

...

In the view of interruption the canned cycle consists of 3 part blocks:

1st part block: Positioning in the selected plane. This block is referred to by control in the view of interruption where only one or two coordinates (in the example X and Y) have been programmed: G0 X100 Y70

Positioning on point R. This part block is in the view of interruption a positioning along an axis. In the example it is the axis Z moving to the value specified at address R: G0 Z2

3rd part block: Hole machining and retraction to initial position (G98) or to R-point (G99). In this case the end position of the part block is the initial position or R-point.

At the end of all three part blocks the control stops in single block mode.

3rd case: Interrupting canned cycle in the course of positioning in the selected plane

If the movement is interrupted while moving to position X=100, Y=70 in the sample block, than manual operation is used, after returning to automatic mode and pressing START button movement is made as in the 2nd case, i.e., axes move to position X100 Y70.

104