S-AT500 Auto PCB Turnover Machine

Double-sided PCB assembly forces every factory to answer the same question: how do you turn the board over without slowing the line, dropping components, or adding ESD risk? Manual flipping is slow, inconsistent and risky. The S-AT500 Auto PCB Turnover Machine rotates a PCB 180 degrees under PLC control and hands it to the next process automatically, removing that variability from your cycle-time calculation.

The hidden cost of manual flipping

Turning a board by hand introduces losses you feel as defects and delay, not as a stopped machine:

Dropped and knocked-off boards. Operators can drop boards, knock off components, or misalign the panel entering the next machine.
ESD exposure. Hand turning brings static-sensitive assemblies into direct contact risk on every flip.
Cycle-time drift. Inconsistent manual handling breaks the takt rhythm of an otherwise steady line.
Rework of the rework. A misaligned board re-enters fixtures and queues, multiplying handling cost.

The Board-Flip Integration Audit

A named method to spec and install an inline turnover without becoming the line bottleneck.

1. Measure. Confirm your PCB size envelope and transfer height against the existing conveyor. The reason is fit: the machine must match panel range and conveyor height, or it creates a new alignment problem instead of solving one.

2. Orient. Set the conveyor direction and 180° rotation to your line flow. A line may need L-to-R, R-to-L, or both, so direction is a configuration decision, not an afterthought.

3. Interface. Verify SMEMA communication with the surrounding equipment. The point is to insert the turnover into lines built by any vendor, not only matched brands, so it drops into your current board flow.

4. Protect. Confirm soft edge grippers and anti-static construction. Component bodies and solder joints must not be touched during the flip, which is what keeps quality steady from operator to operator.

How the S-AT500 maps to your line

Southern Machinery publishes the following S-AT500 parameters for evaluation:

Model — S-AT500.
Machine dimensions — L600 × W840 × H1400 mm.
Transfer height — 920 ± 30 mm.
Rail length / width — 586 mm rail length; width 50–390 mm adjustable.
Max PCB size — L×W 500 × 390 mm; max board weight 2 kg.
Conveyor speed — 0–4 m/min.
Belt type — 7 mm flat belt.
Control system — PLC.
Conveyor direction — L to R, or R to L.
Power supply — single-phase 220 V, 50 Hz.

The S-AT500 is part of the Southern Machinery Board Handling family (buffer conveyors, loaders, unloaders, shuttles) and uses standard SMEMA communication, so it integrates with existing lines as well as full-line solutions covering SMT, THT, wave soldering, board handling and inspection. Confirm 110 V availability and exact panel range with the supplier.

The S-AT500 is part of the Southern Machinery Board Handling family, which also includes buffer conveyors, loaders, unloaders, shuttles and turning conveyors — a complete SMEMA-compatible board flow system. A typical double-sided line might run loader → printer → pick and place → reflow → S-AT500 → second-side placement → reflow → wave (THT) → AOI → unloader.

Where the S-AT500 fits your line

Bottom-side inspection after wave soldering — flip the soldered board so AOI or an operator checks the secondary side.
Double-sided SMT assembly — turn boards between first and second placement passes.
Rework and touch-up — present the correct side up without re-fixturing.
Orientation before downstream — deliver boards correctly oriented to depaneling, test or packaging.
Mixed SMT/THT lines — keep board flow continuous where the other side must be processed.

Buyer checklist

PCB size range — confirm L×W envelope and thickness, including largest and smallest panels.
Board weight capacity — verify gripper and drive handle your heaviest populated assembly.
Transfer height — built at 920 ± 30 mm; match to existing conveyor or plan adjustable stands.
Cycle time vs takt — the flip must complete faster than line cycle time.
Control and communication — PLC, SMEMA, and any MES connectivity required.
Power supply — single-phase 220 V standard; confirm 110 V if needed.

Before you order, send your PCB size, board weight, transfer height and line layout for an S-AT500 configuration and a full-line proposal. Because the machine uses standard SMEMA communication and offers L-to-R or R-to-L direction, it inserts into lines from different equipment vendors as well as Southern Machinery solutions. A correctly specified turnover removes a manual task from every double-sided board and redeploys that time to value-added work.

Run the loop

Re-run the Board-Flip Integration Audit whenever your product mix changes panel size, weight or line direction. That loop keeps the turnover measured, oriented and interfaced correctly, so it never turns into the bottleneck as volumes and boards shift.

Your next step

Send your PCB size, board weight, transfer height and line layout to jasonwu@smthelp.com for an S-AT500 configuration and full-line proposal.

FAQ

What is an auto PCB turnover machine used for?

It rotates a PCB 180 degrees inline so both sides of a double-sided board can be assembled, inspected, or reworked without manual handling.

How does the S-AT500 flip a board without damaging components?

It secures the board with soft edge grippers that hold only the board edges, then rotates the assembly 180 degrees. Component bodies and solder joints are not touched during the flip.

Can the S-AT500 be added to an existing SMT line?

Yes. It uses SMEMA-compatible communication and is offered in L-to-R or R-to-L direction, so it inserts into lines from different equipment vendors as well as Southern Machinery full-line solutions.

What board sizes can it handle?

The published specification covers PCB width from 50 mm up to 390 mm, maximum board size 500 × 390 mm, and maximum board weight 2 kg. Confirm your exact panel range with Southern Machinery for sizing.

Jason Wu

Founder & CEO, Southern Machinery (Shenzhen Southern Machinery Sales and Service Co., Ltd.)

Email: jasonwu@smthelp.com / info@smthelp.com

WhatsApp: +86 13602562576

Catalog & manuals: file.autoinsertion.com | Machine photos: ph.smthelp.com

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