3CTR is a complete electronic control system for tunneling lifting equipment. It is installed on 3 booms lifting equipments for tunneling: 2 platforms to lift people and 1 central boom used to lift centres in tunnels.
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![3CTR, Electronic control system for tunnelling lifting equipment, ITALMEC](https://www.valoroso.it/wp-content/uploads/Three-booms-lifting-equipment-for-tunnels-centre-lifter.jpg)
Electronic proportional manipulators complete each platform transmitter: these components are useful to make movements very accurate. Each manipulator is provided with consent pushbuttons, helpful to avoid that an accidental manipulator movement would compromise operators’ safety.
![3CTR proportional commands, by Amedeo Valoroso, electronic control system for tunnelling lifting equipment](https://www.valoroso.it/wp-content/uploads/3CTR-proportional-commands-1.jpg)
Boom laying centres controls reunite in only two manipulators every function necessary for centre laying. Two separated pushbuttons command clamps opening and closing, to avoid accidental centre unlocking.
![3CTRALIM, by Amedeo Valoroso, filtered power supply, electronic control system for tunnelling lifting equipment](https://www.valoroso.it/wp-content/uploads/3CTRALIM-by-Amedeo-Valoroso-filtered-power-supply-900x611.jpg)
There is an emergency pushbutton, important to block the whole equipment in case of emergency. 3CTR electronic control system for tunneling lifting equipment is equipped with an useful function that inhibits mechanical movements in hazardous conditions. Electronic movement and load limiter (a microprocessor based device) helps operators to lift a centre in safe conditions.
Stabilization controller assures that the lifting equipment is perfectly stabilized to the soil before beginning a working session and a centre mounting.
![](https://www.valoroso.it/wp-content/uploads/Banner-PCBWay-circuiti-stampati.jpg)
Moreover commands selector avoids simultaneous incompatible movements, allowing the operator to concentrate on the movement he’s making.
![3CTRSEL, by Amedeo Valoroso, command selector, electronic control system for tunnelling lifting equipment](https://www.valoroso.it/wp-content/uploads/3CTRSEL-by-Amedeo-Valoroso-command-selector-900x442.png)
3CTR electronic control system for tunneling lifting equipment, the project.
3CTR is a huge project, because it is composed by 16 different PCB electronic boards, more than 40 ICs and more than 550 discrete electronic components. All functions are performed by logic ICs, while the moment and area limiter (a safety device) is equipped with a microprocessor, completely programmed in Assembler language (this is an embedded version of CTR LIM standalone version). 3CTR electronic control system for tunneling lifting equipment commands more than 40 solenoid valves (on/off and proportional).
![3CTR SEL, sample schematic by Amedeo Valoroso, electronic control system for tunneling lifting equipment](https://www.valoroso.it/wp-content/uploads/3CTR-SEL-sample-schematic-by-Amedeo-Valoroso-900x520.jpg)
3CTR electronic control system for tunneling lifting equipment, electronic boards list.
3CTR R, relay main board
![3CTRR, drawing by Amedeo Valoroso, mainboard relay outputs, electronic control system for tunneling lifting equipment](https://www.valoroso.it/wp-content/uploads/3CTRR-drawing-by-Amedeo-Valoroso-mainboard-relay-outputs.jpg)
3CTR RDX, mainboard and PCB rack
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![3CTRRDX, drawing by Amedeo Valoroso, mainboard and PCB rack, electronic control system for tunnelling lifting equipment](https://www.valoroso.it/wp-content/uploads/3CTRRDX-drawing-by-Amedeo-Valoroso-mainboard-and-PCB-rack.jpg)
3CTR RSX, mainboard and PCB rack
![3CTRRSX, drawing by Amedeo Valoroso, mainboard and PCB rack, electronic control system for tunnelling lifting equipment](https://www.valoroso.it/wp-content/uploads/3CTRRSX-drawing-by-Amedeo-Valoroso-mainboard-and-PCB-rack.jpg)
3CTR ALIM, filtered power supply
![3CTRALIM, drawing by Amedeo Valoroso, filtered power supply, electronic control system for tunnelling lifting equipment](https://www.valoroso.it/wp-content/uploads/3CTRALIM-drawing-by-Amedeo-Valoroso-filtered-power-supply.jpg)
3CTR STAB, lifter stabilization process
![3CTRSTAB, drawing by Amedeo Valoroso, lifter stabilization process, electronic control system for tunnelling lifting equipment](https://www.valoroso.it/wp-content/uploads/3CTRSTAB-drawing-by-Amedeo-Valoroso-lifter-stabilization-process.jpg)
3CTR SEL, command transmitter selector
![](https://www.valoroso.it/wp-content/uploads/PCBX-banner-ITA.jpg)
![3CTRSEL, drawing by Amedeo Valoroso, command transmitter selector, electronic control system for tunnelling lifting equipment](https://www.valoroso.it/wp-content/uploads/3CTRSEL-drawing-by-Amedeo-Valoroso-command-transmitter-selector.jpg)
3CTR DEC, command decoder
![3CTRDEC, drawing by Amedeo Valoroso, command decoder, electronic control system for tunnelling lifting equipment](https://www.valoroso.it/wp-content/uploads/3CTRDEC-drawing-by-Amedeo-Valoroso-command-decoder.jpg)
3CTR ALL, centre widener manager
![3CTRALL, drawing by Amedeo Valoroso, widener manager, electronic control system for tunnelling lifting equipment](https://www.valoroso.it/wp-content/uploads/3CTRALL-drawing-by-Amedeo-Valoroso-widener-manager.jpg)
3CTR LIM, moment and area limiter
![3CTRLIM, drawing by Amedeo Valoroso, boom moment and area limiter, electronic control system for tunnelling lifting equipment](https://www.valoroso.it/wp-content/uploads/3CTRLIM-drawing-by-Amedeo-Valoroso-boom-moment-and-area-limiter.jpg)
3CTR TC,command transmitter
![3CTRTC, drawing by Amedeo Valoroso, command transmitter, electronic control system for tunnelling lifting equipment](https://www.valoroso.it/wp-content/uploads/3CTRTC-drawing-by-Amedeo-Valoroso-command-transmitter.jpg)
3CTR TX1, command transmitter 3CTR TX2, command transmitter
![3CTRTX1, drawing by Amedeo Valoroso, command transmitter, electronic control system for tunnelling lifting equipment](https://www.valoroso.it/wp-content/uploads/3CTRTX1-drawing-by-Amedeo-Valoroso-command-transmitter.jpg)
![3CTRTX2, drawing by Amedeo Valoroso, command transmitter, electronic control system for tunnelling lifting equipment](https://www.valoroso.it/wp-content/uploads/3CTRTX2-drawing-by-Amedeo-Valoroso-command-transmitter.jpg)
3CTR EBK, safety board for booms lifting peoples
![3CTREBK, drawing by Amedeo Valoroso, safety for booms, electronic control system for tunneling lifting equipment](https://www.valoroso.it/wp-content/uploads/3CTREBK-drawing-by-Amedeo-Valoroso-safety-for-booms.jpg)
3CTR EBF, boom solenoid valves buffer
![3CTREBF, drawing by Amedeo Valoroso, boom solenoid valves buffer, electronic control system for tunnelling lifting equipment](https://www.valoroso.it/wp-content/uploads/3CTREBF-drawing-by-Amedeo-Valoroso-boom-solenoid-valves-buffer.jpg)
3CTR CEST, proportional solenoid valves processor
![3CTRCEST, drawing by Amedeo Valoroso, proportional solenoid valves processor, electronic control system for tunnelling lifting equipment](https://www.valoroso.it/wp-content/uploads/3CTRCEST-drawing-by-Amedeo-Valoroso-proportional-solenoid-valves-processor.jpg)
3CTR TM, work hours calculator
![3CTRTM, drawing by Amedeo Valoroso, hour meter, electronic control system for tunnelling lifting equipment](https://www.valoroso.it/wp-content/uploads/3CTRTM-drawing-by-Amedeo-Valoroso-hour-meter.jpg)
Party with “decorated” tunnel lifting equipment.
![3CTR, Electronic control system for tunnelling lifting equipment, ITALMEC, people party](https://www.valoroso.it/wp-content/uploads/Tunnel-lifting-equipment-people-party.jpg)
Project started on: Oct, 1996. Status: out of production.
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