Additional Functions (Second Functions); Preparation And Execution Of Spot Mark; Controlling The Current In The Work Piece Corners (Corner) - Cebora PLASMA PROF 166 Betriebsanleitung

SELECTION
(turning knob O)
t
t
t
t
t
t
When the RUN key is pressed, the selected test is start-
ed: the machine first of all performs a "purge", then the
pipes are filled with gas and the GAS INLET solenoids are
subsequently deactivated along with those in the valve
console.
If no leaks are found during the test, e.g., with AIR/AIR,
the display screen of the gas console shows the AIR OK
message (same goes for the other gases: N2 OK, O2 OK,
H35 OK and Ar OK).
If the test T04 has been selected, during the TEST, the
LED of the PGC-2 gas console lights up.

4.2.4 Additional functions (SECOND FUNCTIONS)

In the following descriptions, we shall refer to Fig.21.
With system on and in inactive mode (no RUN: display
R,S,T,U off), enter the "second functions" menu by press-
ing the keys A and E at the same time.

4.2.4.1 Preparation and execution of SPOT MARK

The spot mark is a special type of mark in which the trace
consists of a spot, rather than a line or any other normal
type of mark (see MARK work mode, para.4.2.2).
After setting a number of gas console parameters, the
spot mark can be controlled and performed directly by
the CNC, maintaining the same cut parameters and the
same expendables.
Regulate the sport mark parameters indicated below, se-
lectable in succession by pressing button E:
After the above regulations, by means of a digital signal
on the relative pins (see Fig.14), switch is made from cut
mode to spot mark mode (CUT/SPOT MARK).
60
DESCRIPTION
Air / air channel test
N2 / N2 channel test
O2 / O2 channel test
H35 / -- channel test
Ar / Ar channel test
AUX channel test
Complete test (timed au-
tomatic sequence of T01,
T02, T03, T04, T05, T06)
Tab. 4
SELECTION
(pressing DESCRIPTION
button E)
Spot Enable
(enables/disa-
SEN
bles spot mark
function)
t
Spot Current
SI (spot mark
current)
t
Spot Time
ST
(spot mark time)
*
in this case, the duration of the spot is controlled by
means of the pantograph Start/Stop signal. If, on the
other hand, the time is set, then this value represents
the max duration of the spot from the transferred arc
signal.
4.2.4.2 Controlling the current in the work piece cor-
ners (CORNER)
Reducing the current in the corners of the work piece is
a useful function when associated with cutting speed re-
duction in same. This way, excessive removal of metal in
the corner is eliminated. After setting a number of param-
eters from the gas console, the Corner function can be
managed and performed directly from the CNC, maintain-
ing the same cutting parameters and the same expend-
ables. Regulate the corner parameters mentioned below,
selectable in succession by pressing button E.
SELECTION
(pressing DESCRIPTION
button E)
Corner Enable
CEN (enables/disables
the corner function)
t
Corner Current
(percentage of corner
CI
current with respect
to cutting current)
t
Corner Slope Down
CSD (current ramp down
gradient)
t
Corner Slope Up
CSU (current ramp up
gradient)
* The regulation of the corner current depends on
the position of the switch #2 of the bench DIP3 in the
remote board (see Fig.15).
SELECTION
(turning knob O)
OFF = disabled
ON = enabled
From 10 to 39 A
OFF*
From 0.01 to 1.00 s
Tab. 5
SELECTION
(turning knob O)
OFF = disabled
ON = enabled
From 50 to 100 *
From 1 to 100 A/
(s/100)
From 1 to 100 A/
(s/100)
Tab. 6