@Mark Ollig
Your vehicles, smartphones, computers, and other electronic devices depend on circuit boards filled with hundreds or even thousands of tiny electronic parts.
Your vehicles, smartphones, computers, and other electronic devices depend on circuit boards filled with hundreds or even thousands of tiny electronic parts.
These parts include resistors, capacitors, diodes, transistors, integrated circuits, connectors, inductors, relays, and switches.
They also include sensors, voltage regulators, crystals, oscillators, logic gates, and memory chips.
There are more, but I think you get the idea.
Picking, placing, and monitoring those parts during production demands considerable effort that most people never see.
Every completed circuit board relies on a precise system that ensures each tiny part is placed in the exact location and verified for quality.
This week’s column centers on my son Daniel, whose full-time production facility in Minnesota manufactures industrial electronic modules.
The company is family-owned, and Daniel works side by side with his son, my grandson.
Recently, they installed an SMT HW-T8-72/80F automated pick-and-place machine for prototyping and assembling printed circuit boards, or PCBs.
Much of their work happens behind the scenes, but the products they build help keep industrial equipment, vehicles, and control systems running across the country.
The SMT HW-T8-72/80F pick-and-place machine is manufactured in China by Beijing Huawei Silkroad Electronic Technology Co. Ltd., which exports its surface-mount equipment worldwide, including to customers in the United States.
The machine measures 4 feet, 6 inches by 4 feet, 8 inches by 4 feet, 7 inches and weighs about 1,100 pounds.
It operates on 220-volt alternating current and requires compressed air to power its pneumatic vacuum and motion systems.
I watched the SMT HW-T8-72/80F in operation in a manufacturer’s demonstration video.
About the size of two vending machines, this pick-and-place system features an operator screen, rows of component tape feeders, and a fast-moving placement head that works over a circuit board.
At the center of the machine is an eight-head placement system mounted on a horizontal gantry.
The circuit board moves into the work area on a conveyor.
Once inside, cameras locate reference marks on the circuit board so the machine knows its exact position.
The placement program then directs the moving heads to put each part at the correct X-Y location.
Several pickup heads work in rapid sequence as the machine gathers tiny electronic components from reels of carrier tape and places them onto the circuit board.
Feeders advance the carrier tape in small steps so each part is presented in the correct pickup position.
The machine uses vacuum nozzles to lift the parts, while its camera system checks their position and orientation before placing them on the board.
The entire process is controlled through an operator panel with a computer monitor, where jobs are loaded, feeder positions are assigned, and machine operation is monitored.
Safety panels enclose the work area while still allowing the operator to watch component placement on the circuit board through a viewing window during production.
The SMT HW-T8-72/80F can hold up to 80 feeders and is designed to handle a wide range of small electronic parts used on today’s circuit boards.
It works with standard digital files from design software, such as bills of materials and centroid files, which provide the X-Y coordinates and rotation data needed to place parts on a circuit board.
It also uses PCB layout data derived from Gerber files.
The files are named for the Gerber Scientific Instrument Co., which developed the format to describe a circuit board’s physical layout, including copper traces, connection pads, solder mask, and printed markings used in manufacturing.
These files help tell the machine where components go and how the job should be set up.
The process begins after the solder paste has been applied to the circuit board.
The machine places the component parts onto the pasted surface before the assembly moves to reflow, where heat melts the solder and forms permanent electrical connections.
After that, it is inspected, often by automated optical inspection, or AOI, and any needed touch-ups or rework are completed before final testing.
The main advantage of the SMT HW-T8-72/80F pick-and-place machine is its ability to place parts consistently, with speed, precision, and reliability.
In practice, success relies not only on the machine but also on careful setup.
Feeder positions must be planned, reels kept readily accessible, nozzle types matched to the corresponding parts, and circuit board alignment verified before full production begins.
These steps help prevent defects such as tombstoning, where one end of a component lifts off the board; skew, where a part is crooked; and solder bridging, where solder connects two points that should remain separate.
A slow first-article run ensures proper part orientation and placement before full production, after which production speed increases.
The SMT HW-T8-72/80F can place nearly 11,000 components per hour under ideal conditions, but actual speeds are usually lower because of part size and board complexity.
Its positioning accuracy is rated at plus or minus 0.0004 inch, and it can handle parts as small as 0201 components, roughly 0.008 by 0.004 inch, as well as larger parts used in industrial electronics.
To guide component placement, the machine uses an eight-camera vision system to locate the board’s reference points, while vacuum nozzles pick up and place each component.
With the rise of automated board assembly, traceability became crucial because speed is only valuable if the system can track the parts used and their correct placement.
Daniel developed and implemented two in-house artificial intelligence software systems that run entirely on local hardware, with no cloud connectivity.
The first is an automated optical inspection system, or AOI, that uses a high-resolution camera to capture images of assembled circuit boards and compare them with known-good references.
Its software then uses a neural network and other AI tools to identify missing parts, misaligned components, and solder defects.
Circuit boards flagged by the AI system are sent to a human operator for review and confirmation.
The second AI system manages inventory and production.
It scans components as they arrive, capturing part numbers, quantities, lot codes, date codes, and other details from standardized 2D barcodes to reduce manual-entry errors and improve traceability.
Each reel is tracked individually, including partial reels, so the system always knows exactly what is available for production.
When a component barcode is damaged, AI-assisted fallback tools can restore the missing data, maintaining full traceability of each component from receipt through storage to production.
Additionally, these AI tools verify the availability of required parts before a job begins and identify potential shortages to prevent production delays.
Both AI systems operate fully on-site, so there are no cloud data transfers or subscription fees.
These systems ensure that every completed circuit board and module meets stringent quality and reliability standards.
The pick-and-place machine assembles the boards, while Daniel’s production team uses in-house AI and separate computing systems to monitor inventory, maintain detailed records, and oversee production operations.
Behind much of today’s advanced technology are skilled people like my son and grandson, who help produce the customized circuit boards, electronic control modules, and other electronic assemblies industry relies on every day.
