Description and fields of application for the equipment
Function description during bending of boxes
Function principle
box bending
see diagram page 56
Bending of the box bottom
Bending of very small
pieces
1. "Box Bending" is activated by the box bending button. The signal at the box bending input KAST must be high
(+24V) for at least 100 ms and after that low (0V) for at least 100 ms.
(The box bending function can be canceled by twice activating the box bending button again)
2. AKAS® confirms the selection of the box bending by activating the output HUSP and the LED box-bending
- HUSP output active: The speed change point ( fast -> slow ) must be a bigger value (refer table 15/1)
The receiver elements E3 – E6 are muted, E1 and E2 are active.
3. Release the closing movement by activating the foot pedal. The press closes in fast speed (> 10mm/s).
4. After reaching the change-over point from fast speed to slow speed (= 10 mm/s) :
E2 is deactivated, E1 remains activated for 0,5s (5mm) more (=protection)
5. All Receiver elements are muted and the muting lamp is on. The bending procedure is finished.
(The fast speed mode and the slow speed mode are limited of about 2 min.)
6. After the bending procedure the box bending function is cancelled.
Closing movement with interrupted protective field
The AKAS® system offers the possibility to execute a closing movement under monitored slow speed even when
the protective field is interrupted.
After the interruption of the protecfive field and the release and reactivation of the foot pedal, the AKAS will deac-
tivate the SGA output when the protective field is interrupted. By this, only slow speed will be enabled by the ma-
chine control (NC).
AKAS® provides a reaction time of about 200ms for the machine control and then activated the safety switching
outputs for the closing movement (OSSDs). The OSSDs remain activated as long as the AKAS® receives a
slow speed message to SGS and SGO:
by AKAS®...F within the next 70 ms + the selected enhanced tolerance (see page 36/37)
by AKAS®...M within the next 170 ms (A tolerance enhancement is possible only with the AKAS®...F systems).
In the case of bending of very small pieces, which must be guided by the fingers, the box-bending function
must be selected. Otherwise, the fingers would interrupt E3, E4, E5, E6 (AKAS®-3P M/-F) which would
lead to the switching off of the bending process!
With activated box-bending function, a finger which is placed next to the slog on a large matrix, is not
detected!!
3
3.4
Doku Nr. 1379 Stand 27.1.2017 /Aui
E1
E2
bending line
Fig.12/ 1
E4 E3 E6 E5
side part of the
box
FIESSLER
E L E K T R O N I K
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