Table of Contents
What is PCB Pinner?
A Pinner in PCB is a worker or technician that inserts PCB leads when mounting PCBs and correctly positions the leads on the board. In short words, insertion technicians position the leads of through-hole components such as connectors, capacitors, and resistors to the correct drill holes on the board.
In through-hole PCB assembly, this step is particularly critical—even slight misalignment can lead to solder joint defects, intermittent connections, or short circuits, which will ultimately lead to PCB failure. As opposed to the automated equipment used in SMT assembly, through-hole placement typically entails meticulous manual operation to ensure accuracy. Therefore, not only does the insertion technician’s work facilitate proper placement of components, but it also directly affects the reliability, durability, and performance of the finished product.
Functions of Pinner in PCB Manufacturing
- Pin Insertion: Pinners put the pins either manually or through an automated machine in the pre-drilled holes of the PCB.
- Pin Alignment: Ensuring that each and every pin is perfectly aligned so as to avoid connectivity issues, even short circuits.
- Welding: Sometimes the pinners have to solder the pins. This will ensure the pins do not come off once they are stretched.
- Inspection and Quality Control: Usually, the working of the pinners is inspected, and in most cases, it ensures that the entire pins are in the proper place and have been accurately wired as per the requirements for excellent PCB manufacturing.
Why Pinner is Highly Important in PCB Manufacturing?
The job of pinner in PCB manufacturing companies holds a lot of significance and importance in the following context:
- Accuracy and Precision: The parts to be fitted with pins must-have components that possess excellent accuracy and precision. In the connectors or through-hole parts, if the pin placements vary by a little then this will make a dead circuit.
- Mechanical Strength: In the case of through-hole technology, the pin gives mechanical strength to the PCB. All components stay within their places if the PCB undergoes any kind of mechanical stress or vibration.
- Electrical Contact: Good and reliable electrical contact is given without any intermittently connected pin or short circuit conditions provided by proper pinning.
- Product Reliability: A PCB pinner gives a lot of information on the reliability and durability of a product. Bad pinning results in the failure of a product, sometimes at high costs for both manufacturers and end-users.
Pinner in PCB Factory
Quick Scan 4 Types PCBs
Table 1: Quick Distinction among 4 Types of PCB Pins
| Pin Type | Appearance | Identification Method |
| Through Hole Pins (THT) | Straight, both ends exposed. | Check if it passes through the PCB and both ends are visible, it needs soldering to fix on the PCB. |
| Surface Mount Pins(SMT) | At bottom of components, flat, closely attached to pads. | Pins at the bottom of components, in direct contact with the PCB surface, automated mounting process. |
| High Precision Pins | May have finer manufacturing tolerances. | Smaller size tolerances and more precise positioning, for demanding applications. |
| Custom Pins | Special structures or shapes for specific applications may be designed. | Identify by unique design, for special PCB layout or special function. |
The Pinners and Through-Hole Technology
THT is an acronym for through-hole technology. Within this technique, the component leads or pins are implanted into holes drilled on the board.
Therefore, for through-hole PCB factories, the role of pinners plays a vital role because a mechanical and electrical bond created between the pins and board makes through-hole components resist failure more than surface mount technology.
Why Through-Hole Technology Still Needs Pinners?
- Reliability: The through-hole components are much stronger and more durable. They bear immense mechanical stress resistance; hence, they can be used where the application requires huge mechanical force to be exerted. Automotive, aerospace, and industrial electronics include such applications.
- High-Power Components: Many high-power components, such as transformers and large capacitors, are still using through-hole technology and very accurate pinning must be provided to accommodate electrical loads.
Steps in Through-Hole Pinning
All the components are checked for faults by the pinner; thus, all are in proper positions.
Step 1:
- Borehole: Hole boring is done in the actual position on the PCB by accurate places where the pin to be placed.
Step 2:
- Insertion of the pin: Holes are created by machine or hand; holes are inserted along with leads.
Step 3:
- Solder: Leads with appropriate pads are soldered in the back-end side of the PCB for it to not loosen.
PCB Pinner in SMT
It is different from through-hole technology since it does not use pins for piercing the board. It mounts the components directly onto the surface of a printed circuit board. In so far as pinning requirement goes SMT minimizes, yet with a hybrid board with some pins and other SMT-PCB, pinners continue with their role at chosen stages in the assembly process.
Emergence of SMT and Pinning
Limited Pinning: Since the SMT parts do not have to have leads driven through the PCB, the job of the pinners is highly limited to the SMT-based designs only.
Mixed Boards: In most situations, most PCBs will be composed of both through-hole and SMT parts. Here, the pinners will have to contend with the through-hole part while the machine takes care of the surface-mounted one.
Through-Hole VS SMT Pinning
- Through-Hole: This is a through-hole, where the component leads go through the PCB and therefore have to be pinned and soldered.
- SMT: The components mount on the surface, so there is no need for any through-holes although some connectors and larger parts do have to be pinned. Thus, the pinner is now to check that all components are correctly placed, and mixed technology boards need to be handled.
- Role of a Pinner in Both Cases: In through-hole, the role of a pinner is mainly concerned with pinning and soldering. However, in SMT, his role is now checking the right component placement and handling mixed technology boards.
Key Skills for a Pinner in PCB Factories
A pinner in PCB manufacturing needs some specific skills and attributes to perform the job appropriately.
The following are the key skills:
Attention to detail pinner has to be precise concerning the pin placement, and every single pin should be exactly aligned with the PCB design.
- Manual dexterity: The use of small components requires steady hands and fine motor skills.
- Technical Knowledge: Without knowing the layout and functionalities of PCBs, perfect placements of components and consequently error-free assemblies are not possible.
- Trouble Shooting: Any defects that are noticed or any kind of misalignment should be discovered by the pinner what is wrong with the faulty assembly, so it may be adjusted as soon as possible so that more time wasted in the production process is not increased.
Challenges Faced by Pinners in PCB Production
The profession of pinning in PCB production can be challenging due to the accuracy requirements and the speed at which mass production is done. The following are the challenges:
- Accuracy: A good pinner should make a very accurate movement. Faults such as misplaced and wrongly placed pins have been known to result in circuitry failure, causing circuits in the board to fail.
- Speed: The work of the pinner needs to be speeded up in high-volume PCB manufacturing without losing accuracy in the work. This is achieved by striking a balance between manual and automated machine running.
Technological advancements change the role of the pinner as automation increases. With routine jobs being replaced by the machine, it is up to the pinner to check for quality and work on complex parts that are only insertable in manual ways.
The Evolving Role of the PCB Pinner
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Automation and Robotics:
The high degree of automation in the PCB assembly process results in the use of pinners that substitute hand insertion of pins by a supervisory role to machines while ensuring quality. -
High-Complexity Electronics:
The complexity of electronics results in their being much smaller in size. This remains a very sensitive area of operation where the skills of PCB pinners are greatly in demand.
Conclusion
As PCB manufacturing evolves, the role of pinners in PCB factories will change but not disappear. Though automation can take care of many repetitive tasks, the expertise and manual skill of pinners will always be needed, especially for high-reliability sectors like aerospace, medical devices, and automotive electronics.
Increasingly, mass production pinning will be done by automation, but certainly, unique or complex pieces must be pinned by manual methods. More often flexible PCBs and other high-end designs are being employed. The work of the pinner becomes necessary to be adapted to the new technology.
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FAQs
A1: Pinners in PCBs are used to insert and solder the pins accurately on the PCB board. This is important for through-hole technology (THT), where components such as resistors and capacitors have leads that pass through the PCB board.
A2: Pinner in PCB is designed for a variety of roles that include:
- Pin insertion
- Pin alignment
- Soldering
- Inspection
A3: PCB pinner is a professional who has the following skills.
- Attention to detail
- Manual dexterity
- Technical knowledge
- Troubleshooting
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