Saki 3Xi-ZS1EX: New AXI Built for XXL AI Server Boards

September 23, 2026

*Tokyo, September 9, 2026 — Saki Corporation has launched the 3Xi-ZS1EX, a new automated X-ray inspection (AXI) system built for the oversized PCBs now pouring out of AI server and data center production. Orders open in October 2026.*

*Brand:SAKI Corporation ·

*Product:3Xi-ZS1EX 3D-CT AXI ·

*Angle:Timeliness — fresh product launch news

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Why This Launch, Why Now

If you have walked an AI server line in the past year, you already know the boards have stopped behaving like “normal” PCBs. Designs for AI accelerators and data center infrastructure keep stretching — Saki quotes assemblies up to **1000 × 690 mm** — and with that stretch come three inspection headaches that conventional AXI struggles with:

1. **Board warpage.** A one-meter panel is never flat. Warpage shifts the board surface out of the X-ray focal range and quietly erodes measurement accuracy across the outer field of view.
2. **Tall, hidden geometry.** Press-fit pins, thick power modules, and stacked packages must be visualized in 3D — through the board, not just across it.
3. **Throughput.** Bigger boards with more fields of view traditionally meant slower cycle times, and vacuum-adjacent quality gates were becoming the bottleneck of the line.

The 3Xi-ZS1EX is Saki’s answer to all three, arriving exactly as AI infrastructure capex is pulling these giant boards into volume manufacturing.

What Is Actually New

**Automatic board warpage correction.** The system continuously compensates for board surface variation, holding inspection accuracy stable across the full 1000 × 690 mm panel instead of treating the corners as a best-effort zone.

**High-resolution 3D CT inspection.** Detailed computed-tomography imaging gives a genuine look inside tall components and complex internal structures — the domain of press-fit connectors and high-profile sockets that optical systems can only see from the outside.

**AI-enhanced void detection.** A newly developed, in-house AI algorithm reduces image noise and sharpens the detection of small voids and other hidden defects. Just as important for production stability, the system automatically applies optimized inspection parameters, so results stay consistent shift after shift, program after program.

**Throughput without the footprint.** Saki claims approximately **1.6× higher takt time** versus its previous AXI models, while keeping the whole capability inside a compact platform: **1,483 (W) × 2,488 (D) × 1,630 (H) mm** and 3,500 kg. There is also clearance for double-sided boards with tall components on both faces — a layout that is becoming common on server motherboards.

The Read for SMT Engineers

Two things make this launch worth a closer look beyond the headline specs.

First, the bottleneck it targets is real. On AI server lines, AXI cycle time has been quietly creeping toward line-stopper territory as board sizes grow. A 1.6× takt improvement on the inspection step is the difference between the AXI keeping pace with the line and the line waiting on the AXI.

Second, the timing. Orders open in **October 2026**, which puts pilot installations in the ramp window for next year’s server programs. For CMs bidding AI server business now, inspection capability for 1000 mm-class boards is becoming part of the qualification conversation — and Saki has moved first with a product explicitly built for it.

As Saki President and CEO Masaru Tamba put it in the announcement: with AI expansion, PCBs — particularly for AI servers — “are becoming larger and more sophisticated, creating new quality assurance challenges for manufacturers.” The 3Xi-ZS1EX is Saki’s bet that X-ray inspection should scale up to meet them, without scaling up the machine.

## Quick Facts

*Source: SAKI Corporation press release (Sept 9–10, 2026); Circuits Assembly new product listing; SMT Today coverage.*