NCT Group NCT 100T, NCT 990T manual Rapid Traverse Override Switch, Spindle Speed Override Switch

9 Override Switches

9.2 Rapid Traverse Override Switch

The rapid traverse override switch determines, by how many percent of the rapid traverse rate defined in the parameter should the axes be moved. The diagram beside contains the switch positions and the percentages belonging to the positions.

F0 is a percentage fixed at parameter 1204 RAPOVER. Its practical value is 10% or less.

If the value of parameter 1204 RAPOVER is 0 the rapid traverse override values (depending on the PLC program) are the same discussed earlier at feedrate override in the range of 0, 1, 2, 5, 10, 20, ..., 100%. Consult with the machine tool builder on details.

switch	%
state
1	F0
2	25
3	50
4	100

Feedrate override switch position 0% stops the rapid traverse movements as well, so there is no need to have a rapid traverse position 0%.

In basic configuration, rapid traverse rate override switch can be selected on OPERATOR’S PANEL or POSITION screens. After pressing the action menu key, action F4 % must be selected. This way with the help of softkeys R–, R+ the percentage can be decreased (by means of softkey R–), as well as increased (by means of softkey R+).

If the machine is mounted with NCT machine control board the

rapid traverse override value can be selected with four buttons optionally.

LNote:

The control can also take over % value of rapid traverse rate from feedrate override switch. For details turn to the machine tool builder for an information material.

9.3 Spindle Speed Override Switch

The spindle speed override switch has 11 positions. The switch deter- mines, by how many percent of the programmed spindle revolution (S) should the spindle be rotated. The diagram beside contains the switch positions and the percentages belonging to the positions.

In basic configuration, spindle speed override switch can be selected on OPERATOR’S PANEL or POSITION screens. After pressing the action menu key, action F4 % must be selected. This way with the help of softkeys S–, S+ the percentage can be decreased (by means of softkey S–), as well as increased (by means of softkey S+).

Three buttons are mounted on the NCT machine control board. In this case in place of the above mentioned override adjustment with softkeys

the three buttons can be used. With the button in effect the value

is decreased, while by pressing the button it is increased. By

switch	%
state
1	50
2	60
3	70
4	80
5	90
6	100
7	110
8	120
9	130
10	140

90