NCT Group NCT 990T manual Spindle Rotation Code M3, Coolant Code M8, Other Functions M, Positions

13.6Automatic Operation Start after Block Search

Spindle Rotation Code: M3

The command referring to the last spindle rotation is gathered, in this case M3.

Coolant Code: M8

The command referring to coolant handling is gathered, in this case M8.

Other Functions: M

Other M functions in the program are listed in the 2nd line of the gathered information.

Positions

The positions gathered always show a relative motion from the momentary position of the axes to the position, to which they will move after pressing the START button.

If a block G1, G2, G3, G33 was pointed at in the course of a block search, i.e., this is going to be the first block to be executed by control after the block search the table points at the start position of the selected block.

If the selected block contains rapid traverse positioning (G0, block) the positions of the table point at the end position of the selected block. In case a canned cycle has been selected, the same positions point at the end position in the selected plane.

Afterwards the operator has to decide upon the order of registering the needed state.

START Without Intervention

If the operator presses START button in this state the control registers the needed state in the following order:

–first it executes the selected functions according to their order in the table (i.e. in this case: T1, M12, S500, M3, M8),

–last it positions along an n-dimensional straight line by moving simultaneously on all the axes. The positioning occurs by means of rapid traverse to the distance of 1000 increment measured vectorially from end position, than the distance to go is terminated by means of the valid feedrate.

Intervention by Means of Manual Operation Before START

If a manual operation mode (Jog, Incremental jog, Manual handle feed) is selected before pressing the START button, then the distance, seen in general displaying area distance to go, can be moved by manual operation similarly to BLOCK RESTART and BLOCK RETURN conditions. The axes can be moved continuously in any (+/)) direction to the position, where the distance to go is 0. The axis moved automatically decelerates and stops on the selected coordinate. Thereafter this axis cannot be moved from this position.

There is no need to return fully to the position searched for, but the process can be continued by switching over to automatic mode and pressing START button . Afterwards the order of function execution corresponds to that discussed in the previous point.

By the use of this function the position calculated in the course of a block search can be approached in the desired path by avoiding the possible obstacles.

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