SMT THT Tray Feeder Design and Manufacturing: Southern Machinery Custom Feeders for Smart EMS PCB Assembly

A chip mounter can place tens of thousands of components per hour — but only if the feeder system keeps presenting them. The same logic applies to THT odd-form insertion: an inserter is only as fast as its material supply. Tray feeders are the link that presents JEDEC-style tray components — QFP, BGA, LGA, CSP and other precision parts — to the placement head or insertion head at a fixed, repeatable pick position, without an operator standing by to load trays by hand.

Southern Machinery (Shenzhen, China; 237+ global customers since 2011) designs and manufactures custom SMT THT tray feeders for smart EMS PCB assembly lines. The short demo below shows the tray feeder design and manufacturing work behind this material-supply equipment:

What is this machine used for?

A tray feeder is a material-presentation system that stores and advances component trays so that a pick head — on an SMT chip mounter, a robotic cell, or a THT odd-form insertion machine — can take components from an exact, repeatable position every cycle.

In practice, Southern Machinery's tray feeder range is used to:

Feed precision SMD packages from JEDEC-style trays. QFP, BGA, LGA and CSP parts are typically shipped in rigid anti-static trays. A tray feeder keeps multiple trays staged and indexed so the placement head never has to wait for a manual tray swap.
Supply odd-form and through-hole components to THT automation. Connectors, relays, transformers and other irregular parts that cannot run on tape feeders can be presented in trays to an odd-form inserter such as Southern's S-70LD, replacing a manual DIP insertion bench.
Serve robotic assembly cells. With a pickup-head variant, the feeder can hand components directly to a robot or insertion head, which suits automation cells where components must be picked from a defined position.
Keep material flowing in a smart EMS factory. As part of the material-supply ecosystem, tray feeding reduces the human handling steps that create kitting errors, orientation mistakes and line stoppages.

The exact configuration depends on the component mix: tray stack capacity, tray size, presentation pitch and pickup method are all selected around the bill of materials. Southern Machinery's feeder design team builds custom tray feeders around the customer's tray formats and component set — a "design and manufacturing" service rather than a one-size-fits-all box.

Typical applications

1. High-mix EMS lines running QFP/BGA/LGA/CSP assemblies. When a line changes over between multiple tray-fed product families, a multi-layer tray feeder keeps several tray SKUs online at once. In the Southern Machinery range this includes tray stack configurations of up to 24 layers, which reduces changeover frequency and keeps the placement head fed across product runs.

2. THT odd-form insertion cells. Connectors, relays, transformers and terminal blocks are the classic "odd-form" parts that tape feeders cannot handle. Presented on trays to an odd-form inserter, they can be inserted automatically instead of by hand — directly addressing the manual DIP insertion bottleneck that still exists in many EMS factories.

3. Robotic assembly and automation islands. Tray feeders with a pickup-head option deliver components to robotic cells for precision placement, so the robot spends its cycle placing rather than hunting for parts.

4. Prototype and low-volume SMT lines. Semi-automatic pick-and-place operations (such as the S-530L used for lens and LED component mounting) benefit from tray presentation of larger, fragile or odd-sized parts that are impractical on tape.

5. LED, lighting and power electronics manufacturing. Industries served by Southern Machinery — LED lighting, power supply, appliances, automotive electronics — regularly use tray-fed parts for precision placement where orientation and anti-static handling matter.

How it fits into a complete PCB assembly line

A tray feeder is part of the material-supply layer that supports the whole SMT/THT line:

SMT side: solder paste printing → SPI → pick and place (fed by tape, stick, tube and tray feeders) → reflow → AOI. The tray feeder sits alongside the chip mounter, presenting JEDEC-tray components so the placement head keeps its CPH.
THT side: radial inserters (S-3010B), odd-form inserters (S-70LD) and pin/eyelet terminal machines place through-hole parts; wave soldering (S-WS350B lead-free dual wave or S-WS450) then solders them. Tray feeders supply the odd-form machines with connectors, relays and other parts that do not run on tape.
Material logistics: tray feeding connects to the wider smart-EMS material flow — reel storage systems, kitting, and MES-tracked material presentation. Every component presented automatically is one fewer manual handling step between the warehouse and the board.

In a smart EMS factory layout, Southern Machinery positions tray feeders as part of a complete automation ecosystem: board handling conveyors move PCBs between machines, AOI/SPI verify quality, cleaning equipment keeps stencils and nozzles in spec, and the feeder family — tape, tube, stick, tray and terminal reel — keeps components flowing into every placement and insertion head.

Key selection parameters

Because tray feeders are configured around the component mix, buyers should evaluate these parameters and confirm the exact values against the datasheet for their application:

Tray format and size — the JEDEC tray dimensions and pocket layout of the components you feed (e.g., standard IC tray sizes), and how many tray SKUs must be online simultaneously.
Tray stack capacity — number of trays the feeder can store and index before reload; Southern Machinery's range includes configurations up to 24 layers.
Presentation method — tray-to-tray indexing, pickup-head delivery, or handoff to a robotic gripper; choose based on whether the consumer is an SMT mounter, an odd-form inserter, or a robot.
Changeover time — how quickly the feeder can be reloaded or reconfigured between product runs on a high-mix line.
Component compatibility — anti-static handling, orientation control, and protection for fragile or moisture-sensitive packages.
Integration — communication with the placement/insertion machine, MES connectivity, and physical fit in the line layout.
Build quality and service — feeder construction, spare-parts availability, and the supplier's ability to customize.

ROI and quality perspective

From a buyer's perspective, the tray feeder business case rests on three levers:

Throughput. A placement or insertion head that waits for manual tray changes is losing CPH. Automated tray feeding keeps the head working, which raises the effective output of the whole line — not just the feeder.

Quality. Manual tray handling is a source of orientation errors, ESD exposure, and damaged leads on fine-pitch QFP/BGA parts. A feeder that presents each component at a defined pick position removes that variability from the process.

Labor. Removing the operator task of tray swapping and component kitting at the machine frees headcount for value-added work — a direct labor-cost reduction that is the reason automation projects in EMS factories pay back.

For an EMS company quoting high-mix work, the calculation is simple: the feeder's cost is recovered through fewer line stoppages, fewer handling defects, and less direct labor per board. Because Southern Machinery designs and manufactures the feeder around the customer's trays and components, the equipment matches the real bill of materials rather than forcing the process to fit a standard machine.

FAQ

What is an SMT THT tray feeder?

An SMT THT tray feeder is a material-presentation system that stores component trays and indexes them to a fixed pick position, so an SMT chip mounter, THT odd-form inserter, or robotic cell can take components automatically. It is used for parts supplied in JEDEC-style trays, such as QFP, BGA, LGA and CSP packages, and for odd-form through-hole parts like connectors and relays.

What components can a tray feeder handle?

Tray feeders handle components that ship in rigid anti-static trays — typically fine-pitch SMD packages (QFP, BGA, LGA, CSP) and odd-form through-hole parts (connectors, relays, transformers, terminal blocks) that cannot run on tape or tube feeders.

How does a tray feeder improve EMS line productivity?

By presenting components automatically at a repeatable pick position, a tray feeder prevents the placement or insertion head from starving, reduces changeover frequency on high-mix lines (multi-layer stacks keep several tray SKUs online), removes manual handling errors, and cuts direct labor at the machine.

Does Southern Machinery design custom tray feeders?

Yes. Southern Machinery designs and manufactures custom SMT THT tray feeders around the customer's tray formats and component mix, including tray stack configurations up to 24 layers and pickup-head variants for robotic cells. Contact the team with your tray sizes and bill of materials for a configuration recommendation.

What is the difference between tape, tube, stick and tray feeders?

Tape feeders present components from carrier tape; tube and stick feeders present components from rigid tubes; tray feeders present components from flat JEDEC-style trays. Tray feeders are chosen when components are too large, fragile or irregular for tape or tube presentation — for example fine-pitch ICs and odd-form THT parts.

Can a tray feeder work with both SMT and THT lines?

Yes. On the SMT side it feeds precision packages to a chip mounter; on the THT side it supplies odd-form parts to insertion machines such as the S-70LD. It can also hand components to robotic assembly cells, making it a flexible part of a mixed SMT/THT smart factory layout.

Contact Southern Machinery

Southern Machinery (Shenzhen, China) has supplied SMT, THT and PCB assembly automation to 237+ global customers since 2011. For tray feeder configuration, custom design and manufacturing, and the full feeders, nozzles and material-supply lineup:

Email: [jasonwu@smthelp.com](mailto:jasonwu@smthelp.com)
Website: www.smthelp.com
Catalogs & documents: file.autoinsertion.com
Product images: ph.smthelp.com