The above cases require different types of intervention by the operator. The above problems must be repaired by means of services of the control discussed here. 13.1 Interruption of Automatic Operation In the course of automatic operation the following interventions cause interrupted state: – appearance of emergency stop state, e.g. by pressing the EMERGENCY STOP button, – effect of the RESET key or – changing the operation mode The interrupted state is indicated by caption INTD in the 3rd field of status bar. In interrupted state lots of manual interventions can be done on the control, which can be registered or canceled when restarting. 13.2 Restart of the Automatic Operation. Modal Information. The automatic operation can be restarted in three ways in INTD state: – unconditionally, – by means of the condition BLOCK RESTART or – by means of the condition BLOCK RETURN . The difference among the three restart methods is that while in the first case if movement from interruption point has been made it goes to the block end position, in the second case it goes to the start position of the interrupted block and re-executes the whole block, and in the third case it moves back to interruption position and continues machining from there. In the interrupted (INTD) state of automatic operation the modal information changes by entering a single block or running the program selected for manual data input mode. Therefore 13 Interruption and Restart of Automatic Operation if machining is started in INTD state of automatic mode and START button is pressed, control registers STOP state and message RESTORE MODAL FUNCTIONS? Y is displayed (Y=yes). By pressing key question RESTORE MODAL FUNCTIONS? N is asked (N=no). The messages can be switched over by the use of key . If the START button is pressed, it restores the state before suspension according to the message (Y) or not (N). The message is canceled with the help of the RESET key and INTD state remains. Modal information restated or not restated: – modal G codes, – value F, – compensation code: T__nn, – modal parameters of canned cycles (start level, R level ect). After restart has been made from INTD state the work zero point offsets and tool compensation values altered always taken into consideration. 13.3 Unconditional Restart of Automatic Operation 13.3 Unconditional Restart of Automatic Operation If automatic operation is started from interrupted state (INTD) unconditionally after START the control goes to the end position of the interrupted block and carries on machining from there. The typical applications of the function are as follows: – the errors must be canceled, than the machining continued when error messages are coming from program module preprocessor or PLC, – during machining parameters of cutting may need to be repaired, for example if spindle speed (S) or feedrate (F) must be overwritten by means of manual data input, than the machining continued, – in more simple cases the end position or measure data is to be modified without repairing the part program, – if in course of the machining an obstacle, for example a workpiece clamp is in the way of tool path it needs to be rounded, than the cutting continued. Interrupting Single Blocks 1st case: in state G40 interruption of linear interpolation parallel to an axis Let us examine fragments of the following sample programs: Program No. 1: Program No. 2: ... ... N60 G90 G0 X20 Z0 N60 G90 G0 X20 Z0 N70 X120 N70 G91 X100 N80 Z–30 N80 Z–30 ... ... Programs No. 1 and 2 are on the same tool path, however the data specification of the former one is absolute, while that of the latter one is incremental. The interruption occurs in block N70. In position X=60, Z=0 the movement is stopped, the automatic mode is interrupted and the slides are carried to position X=80, Z=20 by means of manual operation. If afterwards the automatic mode is returned, and the START button is pressed the movement programmed in block N70 is finished. X axis moves to the programmed position X=120, 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 Z axis does not move in block N70, it only returns to the programmed original tool path in block N80, where movement Z is programmed. In case Z axis is not referred to in more subsequent blocks it only returns to the programmed path in the block, in which reference to address Z takes place. The movement is the same, if in single block mode the automatic operation is closed in the start position of block N70, manual operation is used, than after return the START button is pressed. 13.3 Unconditional 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: ... ... N40 G90 G0 X20 Z–10 N40 G90 G0 X20 Z–10 N50 X80 Z–60 N50 G91 X60 Z–50 N60 Z–85 N60 Z–25 ... ....
)
