Code Guard

CODE GUARD

Binary Codes Scanner
for folder-gluer machines of any make

Economocal and extremely friendly. Provided of self diagnosis electronics for total reliability. Causes of automatic production stops, for malfunctioning or improper use, signalled by specific messages on LCD display and, if installed, two external, well visible, optional coloured lamps. Easy to link to an Eject Guard + Ejector for the automatic ejection of wrong cartons.

DESIGN:

Scanning speed	600 metres/minute (machine belts speed)
Optical head	White light beam for the scanning of black or coloured codes on opaque carton
Code required	Binary: combination of thin and thick bars printed on carton's glue flap
Bars hight	Minimum 5 mm in total absence of carton's waying, suggested 8 mm
Bars thickness	No restrictions: programmable, through key pad, in 10th of mm.
Scanning area	Programmable, in mm, though key pad and shown on LCD display
Reliability	Ensured by an integrated self-diagnosis circuit
Shift register	Programmable, in cm, though key pad and shown on LCD display. It requires the use of an error monitoring unit (EDI or Eject Guard) + Ejector
Machine Stop	One relay is provided for either the stop of the machine or stop of the feeder if equipment linked to an Eject Guard
Faults counter	Shown on display and resettable though key pad

Any misfunctioning or improper use of the equipment, imperilling the reliability of the controls to perform, is immediately identified by the self-diagnosis circuit which sets off the production stop signalling on display, as well as though the optional external lamps, the specific cause of the stop.

Causes of production stop for anomalies assessed by the self-diagnosis circuit:

Encoder (MSD) signal absence: encoder damaged, encoder's wheel not in contact with the machine belt, encoder wheel loose from encoder' shaft, cable's connectors (at either ends) disconnected or short circuited, cable cut off or shared.
Optical head signal absence: coded glue flap not transiting in the scanning head, fault in the optics or in the head'selfgating cell, burned lamp, cable's connectors (at either ends, including extension cable) disconnected or shortcircuited, cable cut off of sheared.
Photocell, for cartons detection, signal absence: this photocell has the purpose to confirm, to the equipment electronics, the transit of cartons through the machine. This signal is cross checked with that of the optical head and for any of these two signals missing is forseen the alarm for misfunctioning. Absence of this signal may derive from: photocell damaged, wrongly positioned, cable's connectors (at either ends) disconnected or shortcircuited, cable cut off or sheared.
Absence of "RUN" condition when starting production. After having inputted the code, should the equipment be forgotten in "program" mode, the first carton transiting in the optical head will generate the condition of malfunctioning. In fact, while in program, the equipment will not perform any code scanning control.
Wrong length of carton's flap: the equipment automatically retains in memory the flap length of the first carton which has gone through the optical head. Any following carton not having this same length will cause the production stop.
Machine running empty: it is the case when the Code Guard receives just the signal from the turning encoder (MSD) and no cartons are detected by either the photocell or the optical head. However, an alarm (on display e by external lamps) has been forseen for this condition (although, of course, not associated to machine stop) for the case that both signals should result absent, for any reasons, during production. In this case, the operator must stop the machine himself and verify the reasons for the absence of both these signals.
Wrong code: the scanning of a wrong code will set off an acoustic alarm which will result temporized (short buzz) if the Code Guard has been linked to an Eject Guard , or permanent when:

The Code Guard is used alone (machine stop at first error)
The Code Guard linked to an Eject Guard has attained the number of consecutive errors preset for machine stop.

Faults in the equipment hardware (including the self-diagnosis circuit): the relay, no longer activated by the good working conditions of the electronics, is released. The release of the relay will stop the machine or, if equipment linket to an Eject Guard, stop the feeder. Machine stop cabling is forseen through an interface box provided with an on/off key to permit the disactivation of the machine stop in case of serious hardware misfunctionning requiring external repairs.

Made by DECA s.r.l.