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NUOVA ELETTRONICA DSP LASER Instruction Manual

Type 4 safety device with visible laser emission
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TRANSLATION OF THE ORIGINAL INSTRUCTIONS
NUOVA ELETTRONICA s.n.c. di Pasqui F. & C.
Via Parri ZI Moiano - 06062 Città Della Pieve - PG - ITALIA - UE
Tel. : +39 (0)578 298066 Fax: +39 (0)578 297007
web: www.nuova-elettronica.com e-mail:
DSP LASER
INSTRUCTION MANUAL
TYPE 4 SAFETY DEVICE
WITH
VISIBLE LASER EMISSION
Revision 1.7 of 29.01.2020
info@nuova-elettronica.com
DSPLSR01EN
Rev. 1.7 – Ed. 29/01/2020

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Summary of Contents for NUOVA ELETTRONICA DSP LASER

  • Page 1 WITH VISIBLE LASER EMISSION Revision 1.7 of 29.01.2020 NUOVA ELETTRONICA s.n.c. di Pasqui F. & C. Via Parri ZI Moiano - 06062 Città Della Pieve - PG - ITALIA - UE Tel. : +39 (0)578 298066 Fax: +39 (0)578 297007 web: www.nuova-elettronica.com e-mail:...
  • Page 3 Status of manual Manual code: DSPLSR01EN Revision: Issue: 29/01/2020 Chronology of document revisions Date Revision Summary of changes 12/09/2009 Draft 24/10/2009 First issue 01/12/2009 Second issue 10/12/2009 Third issue 03/02/2017 Fourth issue 16/03/2017 Fifth issue 26/11/2019 Sixth issue 29/01/2020 Seventh issue Copyright information Possible information about copyright...

  • Page 5: Foreword

    Contact Nuova Elettronica for clarifications, explanations or to ask for possible additional copies or updates of the manual itself. Nuova Elettronica reserves the right to execute changes to the production and to the manual without the obligation to update the production and the previous manuals.

  • Page 6: Symbols Used In The Manual

    DSP LASER Symbols used in the manual The important information has been highlighted and accompanied by the word: Lack of reading this information can cause serious dangers for the operator Warning: The information signals a risk which had been impossible to eliminate...

  • Page 7: Warranty

    Technical and Repair Service, as the replies to the request of specific information or explanations, are provided directly by the equipment manufacturer: NUOVA ELETTRONICA s.n.c. di Pasqui F. & C. Via Parri ZI Moiano - 06062 Città Della Pieve - PG - ITALIA - UE Tel.

  • Page 8: Table Of Contents

    9.1. Operating cycle of a bending press-brake ............13 9.2. Foreseen use of the DSP LASER device ............14 9.3. Operating principle .....................15 Requirements necessary for the correct use of DSP LASER ......16 10.1. Command circuit of the press-brake ..............16 10.1.1. Start and stop ...................... 16 10.1.2.
  • Page 9 DSP LASER 12.1.4. Display of the lock after 30 operating hours ............33 12.1.5. Blanking and Exclusion LED ................34 12.1.6. LED for OSSD outputs in state ON ..............34 12.1.7. LED for OSSD outputs in state OFF ..............34 12.1.8.

  • Page 10: Safety Precautions

    Signals of residual risks • The device DSP LASER has been designed with the aim to eliminate or reduce as most as possible any risk for the user; however in case of improper use, conditions of limited danger, which cannot be completely eliminated, could occur. Possible residual risks are indicated in the following chapters of this manual.

  • Page 11: Spare Parts

    6.7. Decommissioning When you decide not to use the device DSP LASER anymore because obsolete or irreparably faulted, execute the decommissioning making the device itself not operating and free from dangers. Seal the device inside a robust package and provide to its disposal operating in compliance with the current laws, asking to the local bodies charged for these operations.

  • Page 12: Key

    = Output Signal Switching Devices; = Initials of the transmitter, part of DSP LASER, which generates and radiates the light beam; = Initials of the receiver, part of DSP LASER, which includes the sensitive function, the check and command function and the LED; REDUNDANCY...

  • Page 13: Planning Safety Measures

    CEI EN 61496-1:2014 and CEI EN 61496-2:2014, it can be classified as ESPE of type 4. ISO 13849-1:2015, it can be classified as PL=e; SIL3. The laser contained in DSP LASER is classified as CLASS 1M according to the rule CEI EN 60825-1:2015.
  • Page 14 LASER BEAM Fig. 8.1 Principle scheme In “state ON” the device DSP LASER is in the phase of active control of the equipment during its operation, while in “state OFF” DSP LASER has already intervened on the equipment, deactivating its command mechanisms due to the occurrence of a possible danger condition, the intrusion of an element into the detection area.

  • Page 15: Introduction

    TX and RX components (caused, for example, by the intrusion of an element into the detection area), the lack of power supply to DSP LASER, 30 hours of continue operation, failed check of the stop space, failure of the DSP LASER equipment itself.
  • Page 16 At last, the management of the procedures of stop, suspension and reactivation of the machine are entrusted to the main control board of the machine itself. DSP LASER is available in more versions which differ for the following main characteristics: •...

  • Page 17: Operating Cycle Of A Bending Press-Brake

    ALdc module has to be ordered. If you wish to order one DSP LASER module for a machine with stopping distance of 3mm, WITHOUT out-of-stroke test, WITHOUT anti-repetition pedal, with Blanking of type B and 230Vac power supply, the proper code to order is: RX B000.

  • Page 18: Foreseen Use Of The Dsp Laser Device

    DSP LASER DSP LASER is connected to the press command circuit in such a way that, if intercepted, it stops the mobile table only during the fast approaching phase (from PMSM/PMS to PCV). In this way, it ensures the safety of the operator against the mechanical dangers (due to the approaching movement of the punch to the die) in the area of the dies: •...

  • Page 19: Operating Principle

    DSP LASER Whichever use different from those clearly allowed and pointed out in this use and maintenance manual of DSP LASER is, and must be considered, forbidden; because of these utilisations not allowed and/or unforeseen by NUOVA ELETTRONICA s.n.c. of Pasqui F.

  • Page 20: Requirements Necessary For The Correct Use Of Dsp Laser

    The passage from position n. 3 to position n. 1 must not generate a start command. No cycle of the press-brake must be able to be started using the DSP LASER device itself, but a proper command device must be always foreseen.

  • Page 21: Operating Modes

    The inhibition function must be realized by the command circuit of the machine with a safety level equivalent to that of the DSP LASER device, as prescribed by EN 12622:2014. At the end of each working cycle, the stop function generated by DSP LASER must immediately return active before the user can command the high-speed closing.
  • Page 22 However, a very little size of the piece can cause the operator’s fingers hide the detection area. The central part of DSP LASER remains active during the high speed closing movement in any operating mode. The hiding of the central area must always cause the stop of the press when the closing speed is greater than 10 mm\s.
  • Page 23 The active state of the blanking function however depends on a time, elapsed which DSP LASER returns to the state which obligates the start of a bending cycle with the blanking function deactivated.
  • Page 24 DSP LASER Blanking function “Enabling by Operator” The control circuit of DSP LASER uses these command signals of the press-brake for the management of the blanking function: • the Press brake closing pedal (IN PD) signal • the Press brake opening (IN AP) signal...
  • Page 25 High speed in press brake closing (IN AV) signal is active. Both the switch-on of the DSP LASER device and in the moment of the selection of operating mode 2, the blanking function is disabled.
  • Page 26 DSP LASER Mode 1: Detection area fully active The normal sheet bending allows keeping the whole detection area active during the fast approaching of the tool. Even the bending of boxes can take place with the detection area fully active. In fact, it is sufficient to provide the press with the function of automatic stop at the reaching of the speed change point and to insert the piece between the tools only after the punch has come to a complete stop.
  • Page 27 DSP LASER Mode 2: Front area in banking state and rear area excluded Bending of special shape or size or pieces with very little size. This function must be used only when necessary for the type of work to execute. The employer is then responsible to check the correct use of the function and forbid the abuse of it.
  • Page 28 DSP LASER Mode 3: Rear area excluded Backgauges near the dies. This function must be used only when necessary for the type of work to execute. The employer is then responsible to check the correct use of the function and to forbid the abuse of it.

  • Page 29: Check Of Overtravel Or Stop Space

    The stop circuit of the machine answers again with its initial project and test performances. The check, in this case, is passed and the outputs of DSP LASER return to state ON allowing the normal operation of the machine.
  • Page 30 DSP LASER For the meaning of the LEDs during the check of the stop space and of the exceeding of the 30-hours continue operation see Chp. 12.1.1. Phase A 1 Phase B Phase A 1 Phase B PMSM V.S.A. FAST DOWNST.
  • Page 31 The cam reaches the limitswitch VSA which determines the passage of the OSSD outputs of DSP LASER to state OFF. The circuit of the press-brake inhibits the high speed, causing the stop of the machine. However the table makes a residual stroke, due to inertia, equal to the value of the stop space.

  • Page 32: Interlock Of Restart

    S.A. 10.1.5. Interlock of restart While the machine is stopped and an object is detected by DSP LASER, because it obscures one or more receiving elements, the device sets the OSSD outputs to OFF state. When the object is not detected any more, the outputs return to ON state.

  • Page 33: Residual Risks

    In order to allow the working, the stop command caused by the interception of the detection area of DSP LASER must be inhibited when the closing speed of the press-brake is lower than or equal to 10 mm\s. The safety of the operator is ensured by the reduced speed combined with a dead-man command.

  • Page 34: Blanking

    11.2.2. Blanking The protection system DSP LASER has been designed to protect the operator against the dangers due to the closing movement of the tools of a press-brake. The detection area is subdivided in a front area, a central area and a rear area. The front area forbids the squashing of the operator’s fingers between the front part of the punch and the die or the...

  • Page 35: Installation And Uninstallation Of Tools

    DSP LASER 11.2.3. Installation and uninstallation of tools Shearing risks are present between the punches and the dies installed on the press-brake and not used for the piece in the current process. Systematically uninstall the unused dies. Check always the tonnage set on the press-brake and the strength of the tools. An excessive tonnage could break the dies.

  • Page 36: Signals And Plate Data

    12.1. Light indicators: scheme and functions The DSP LASER device is equipped with LEDs allowing the rapid identification of its operating status. Moreover the front sides of TX and RX present references necessary and useful for the positioning of the generated detection area.

  • Page 37: Display Of The Alignment With Four Leds

    12.1.4. Display of the lock after 30 operating hours If the DSP LASER device, and then the machine which it is connected to, operates for more than 30 hours without interruptions, the system activates a locking function which sets the outputs to the permanent status OFF.

  • Page 38: Blanking And Exclusion Led

    DSP LASER characteristics ensuring the efficiency if the electro-hydraulic circuit responsible of the machine stop are checked at most every 30 operating hours. 12.1.5. Blanking and Exclusion LED When the operating mode 2 or 3 is selected (see chp. 11.2.2), the YELLOW LED blinks.

  • Page 39: Identification Plates

    Warning not to directly observe the laser beam with optical instruments Fig. 12.3 Rear identification plate of TX The following data are reported on the side plate of TX: • Part of the device: DSP LASER-TX • Serial number and manufacturing date •...
  • Page 40 DSP LASER Fig. 12.5 Rear identification plate of RX The following data are reported on the side plate of RX: • Part of the device: DSP LASER- RX • Serial number and manufacturing date • Indication of the type of RX, that is its configuration Fig.
  • Page 41 Name, address and contact references of the Manufacturer of the device • Logotype “Costruito in Italia” • Part of the device: DSP LASER-AL • Indication of the type of AL, that is its configuration • Power supply voltage: IN 230 Vac or IN 24 Vac, and GROUND •...

  • Page 42: Installation

    DSP LASER Installation DSP LASER is a device with a high safety level; it is however necessary to install it properly and to use it according to the following instructions. 13.1. Standard supply The DSP LASER device consists in the following elements: •...
  • Page 43 DSP LASER Fig. 13.1 Drawing of the containers of the devices The detection area must be placed under the upper tool. The manufacturer of the press has the task to correctly install the device, while the user is responsible to correctly adjust the device according to the indications of the manufacturer and to the different used tools.

  • Page 44: Setting

    In order to allow the bend of the boxes, DSP LASER must not be centred with the symmetry axis of the punch tip, but slightly out of axis.

  • Page 45: Installation

    DSP LASER • The distance between the front part of TX and RX and the basement of the press is greater than or equal to 100 mm with the purpose to avoid the squashing of the hand. The adjustment of the supports takes place only along the vertical axis of the press, in parallel direction to the bending surface.
  • Page 46 Additional protection must be adopted to eliminate the dangers which can be generated by DSP LASER (for example, between DSP LASER and the fixed parts of the press) and to allow the access to the dies area passing through the front area.

  • Page 47: Electrical Connection

    AL module). Insert the power supply module inside the electrical board of the machine downstream the main switch and connect as from enclosed scheme. Energize the DSP LASER, supplying voltage to the electrical board which it is connected to, obtaining: on TX: the activation of the visible laser beam.
  • Page 48 DSP LASER CONNECTION SCHEMES Fig. 13.6 scheme of connection with AL1B DSPLSR01EN...
  • Page 49 DSP LASER Fig. 13.7 scheme of connection with AL2B DSPLSR01EN...
  • Page 50 DSP LASER Fig. 13.8 scheme of connection with ALdc DSPLSR01EN...
  • Page 51 DSP LASER Fig. 13.9 scheme of connection without AL module DSPLSR01EN...
  • Page 52 RX SIGNALS The selection and command signals, generated by the electrical circuit of the press or by the discrete components however external to DSP LASER, are connected to the clamps of RX nr. 4, 5, 6, 7, 8, 9,11 and 12.
  • Page 53 Each function needs specific inputs to be executed. If an input is not used by any function, it can be left disconnected. The list of the inputs used by every function of DSP LASER is reported here below: verify, depending on the chosen option, which inputs are used and which can be left disconnected.
  • Page 54 The opening of OSSD A-B OFF produces the intervention of the outputs of DSP LASER, setting them just to state OFF. The DSP LASER device is not provided with a feedback circuit for the control of the real switching of the support relays in output. This function must be executed by the control circuit of the press.
  • Page 55 Figure 13.10 Example of generation of high speed closing signal OUTPUTS The DSP Laser system provides two output channels (A and B) for the stop of the high speed closing movement of the press. The outputs taken from RX are at solid state and are suggested if coupled to a safety PLC.

  • Page 56: Commissioning

    Once connected TX and RX and if present the AL module and the other signals necessary to the operation of DSP LASER system, depending on the model of RX and AL, energize the system. TX will emit laser light and, on RX, some LEDs will result on, as described in paragraphs of 12.1.
  • Page 57 DSP LASER Adjust the height of TX, moving the support in vertical direction, in such a way that the LOWER EDGE OF THE LASER EMISSION coincides with the line pointing out the STOP SPACE of the machine, as in Fig. 14.4. In this example, the lower edge of the laser emission is place on the line pointing out a stop space whose value is 13mm.
  • Page 58 DSP LASER Fig. 14.4 Projection of TX over the positioning tool Move then the test and positioning instrument over the lower tool at point B of Fig. 14.3 or, however, near RX. Check that the beam is yet in the previous position with respect to the positioning instrument.

  • Page 59: Check Of The Stop Space

    DSP LASER In point B1 of Fig. 14.3, you can see the front side of RX illuminated by a part of the beam exiting from the SLOT FOR RX HORIZONTAL POSITIONING. Move RX in horizontal direction in such a way that the light is between the STOPS FOR THE RX HORIZONTAL POSITIONING, as in Fig.

  • Page 60: Use

    15.2. Check of the stop space At every switch-on of the machine, and then of DSP LASER, the check of the stop space is required, so it is necessary to move the mobile table to PMSM and command the high-...
  • Page 61 DSP LASER Adjust the height of TX, moving the support in vertical direction, in such a way that the LOWER EDGE OF THE LASER EMISSION coincides with the line relevant to the STOP SPACE of the machine (see Fig. 15.1).

  • Page 62: Check Of The Correct Positioning

    The interception of the detection area must cause the turn-on of the RED LED and the turn- off of the YELLOW/BLUE and GREEN LEDs. If one of the LEDs was faulted, stop immediately the machine and call NUOVA ELETTRONICA to repair the device. Warning: DSPLSR01EN...

  • Page 63: Maintenance

    RED LED steady on Error of limitswitch VSA. S.A. has become greater. Turn-on in sequence of LEDs: DSP LASER with OSSD outputs in state OFF permanently RED, GREEN and YELLO/BLUE Because operating from more than 30 consecutive hours. Only RED LED on Malfunction or absence of the synchronism signal.

  • Page 64: Removal Of The Device And Re-Installation After Repair

    DSP LASER Removal of the device and re-installation after repair If DSP LASER presents a defect or a malfunction, and then must be disconnected from the machine to be repaired, act as described below (this procedure allows avoiding the disconnection of the cables, limiting the operation only to the unassembly of the component of the device to repair): •...

  • Page 65: Technical Characteristics

    DSP LASER Technical characteristics ELECTRICAL DATA • Power supply: Voltage: Direct 24Vdc or with ALdc module; 24Vac or 230 Vac ±10% freq. 50 Hz / 60 Hz with the use of AL1B and AL2B modules: Consumption with: Standard 10V/A - ALdc 14 V/A - AL1B 10 V/A - AL2B 14 V/A •...

  • Page 66: Ce Declarations Of Conformity

    II A della Direttiva 2006/42/CE Noi, NUOVA ELETTRONICA s.n.c. di Pasqui F. & C. Via Santa Lucia, 40 – 06062 Città della Pieve – PG – Italy Cap. Soc. € 12.911,42 i.v.-Iscriz. Trib. Orvieto n. 808 – Iscr. C.C.I.A.A. P.I. C.F. 00656340544 dichiariamo sotto la nostra esclusiva responsabilità...

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