Sampling and pre-series refer to a limited production that is carried out before the mass production.
We always recommend sample and pre-series production of electronic boards, in order to verify functionality and suitability, carry out tests and inspections, before the final production, thus optimising costs and production time.
With the industrialisation phase, we get to the heart of electronic board production.
After having analysed the Customer’s project, the dedicated technical staff checks that the product is producible and testable, paying attention to cost optimisation, and that the set quality standards are guaranteed.
Standard documentation necessary for the subsequent stages of the process, from material procurement to production and testing, is also created.
We can also offer support in the mechanical development, thanks to an external collaborator who has been working with us for many years.
Inbound logistics refers to all activities related to the procurement and storage of materials required for production. An effective and efficient supply chain is necessary to guarantee a good quality/price ratio of the product.
We use reliable distributors to purchase of components, which are stored in our warehouses in a safe and controlled manner. Incoming control guarantees the verification of the correctness of the material received from the supplier.
We handle with the same care material of our own purchase, as well as components supplied by Customers.
Automatic warehouses: they automate the reception, storage, traceability, picking from the warehouse and delivery to the production lines of the components required for the production. Integrated humidity control.
Automatic vertical warehouses: they allow components to be stored in a safe, clean, orderly and fast place, thus reducing the number of movements that operators have to perform, and avoiding the risk of damaging components.
Narrow aisle warehouses: they allow the stacking and picking of entire pallets or individual items in high-bay warehouses. This allows more usable storage space than wide aisle warehouses.
This technology involves the assembly of the circuit board by a machine (Pick&Place), which ‘picks up’ the component and put it in the dedicated position on the circuit board.
In Computec, we have 3 complete SMT lines.
Each SMT line consists of different machines, each with a specific and fundamental task in this process.
Laser machine: allows the engraving of unique QRs/datamatrixes for board traceability, also integrating data requested by the Customer.
Silk-screen printing machine: this allows a thin layer of solder paste to be deposited on the surface of the printed circuit board, in those areas where the design envisages the presence of SMD components.
Pick & Place Machine: the components, arranged on reels, are recognised by the machine, which picks them up and places them on the PCB, positioning them in the dedicated spot on the printed circuit board, awaiting final soldering in the oven.
Soldering oven: the assembled PCB passes from the Pick&Place machine to the oven, so that the components are soldered to the pads.
Once the SMT process is completed, the boards move on to the verification phase of the assembly performed. This verification is possible thanks to:
3D machine for AOI: it allows checking the quality of the soldering and the correct positioning of the components.
For further controls of the production batch, we carry out spot checks with:
X-Ray inspection machine: it allows detecting weld gaps, areas where the weld is missing or not completely filled, bridges under the components, so that we can promptly intervene with specific corrective actions.
Electronic boards are assembled by means of holes in the circuit boards in this traditional technology. PTH assembly is used when components are specially designed for this type of technology or are so large that they cannot be inserted into the Pick & Place.
In these cases, an initial semi-finished part is made from SMD assembly and then PTH assembly is applied. This process is almost entirely manual: our operators are trained to proceed with care and precision.
For soldering, we have the following solutions:
Selective soldering machine: in selective soldering, also known as mini-wave soldering, the soldering points are individually programmed and monitored to control the flux volumes and soldering time.
Wave soldering machine: with wave soldering, PCBs are moved over a molten solder wave. As the PCB are moved over, the molten solder wave wets the exposed metal surfaces of the components and PCB, forming a bond.
Testing helps to ensure that the board produced is perfectly compliant with the design specifications, in terms of functional performance and durability.
At the end of the SMT assembly phase, the boards are verified with parametric testing performed by:
Flying Probe Machine (Flying Probe Test) for In Circuit Test (ICT):itallows the assembly and electrical characteristics of the components to be verified. Flying Probe technology guarantees process flexibility, handling even small batches.
We are also equipped to perform functional tests, operating cycles, programming of microcontroller devices, end-of-line electrical safety tests, etc.
Testing can be designed directly by our engineers or in collaboration with the Customer, according to the specifications of the board to be tested. It can be performed manually or automated according to the requirements and production batch quantities.
For some products, we perform a “stress test” by keeping the devices powered up for 100 hours: this test allows us to increase the reliability of the devices that will reach our Customer.
Once produced and tested, the board can be assembled, if requested by the customer, in its holder or kit, where it will make up the final product.
We can also handle electromechanical assemblies of finished products, where we handle both wiring and mechanical and electronic assembly, completed with functional testing and ready to be sold by the customer to the end user.