Product Core Brief
- Model: ZMI4104
- Brand: ZYGO
- Series: ZMI™ Displacement Measurement System
- Core Function: Calculates precise displacement using optical signals from ZMI™ laser sources.
- Product Type: 4-Axis Displacement Measurement Board
- Key Specs: 0.15 nm Resolution | 2.55 m/s Max Speed | VME64x Form Factor
- Condition: New Original / New Surplus
Product Introduction
ZYGO ZMI4104 measurement boards process interferometer light signals to deliver sub-nanometer position tracking. This industrial automation unit features four independent axes and integrates directly into VME64x chassis.
The ZYGO ZMI4104 achieves a blistering 0.15 nm position resolution with a maximum tracking speed of ±2.55 m/s. Field engineers value its modular architecture, which allows seamless expansion to support up to 64 measurement axes in complex metrology applications.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Axes Per Board | 4 Independent Axes |
| Position Resolution | 0.15 nm |
| Max Tracking Speed | ±2.55 m/s |
| Max Speed Accuracy (σ) | 0.2 nm |
| Minimum Optical Power | 0.07 µW |
| Form Factor | 6U VME64x |
| Cyclic Error Compensation | Yes (Proprietary Reduction) |
| Compatible Lasers | 7702, 7705, 7714, 7724 |
| Max System Expansion | 64 Measurement Axes |
| Interferometer Type | Dual-Pass Compatible |
Quality Control Process
Every ZYGO ZMI4104 undergoes rigorous optical and electrical validation before shipping. We first verify the VME64x backplane handshake and confirm all four axes initialize without bus faults. Next, technicians inject calibrated optical signals to validate the 0.15 nm resolution and confirm the proprietary cyclic error reduction is actively suppressing non-linearities.
We also measure the minimum optical power threshold to ensure the photodetectors reliably trigger at 0.07 µW. The board’s thermal characteristics are monitored under full-speed tracking conditions. Finally, the unit is sealed in anti-static, vibration-dampening packaging to protect the sensitive DSP components during transit.
Replacement Pitfall Guide
❗ Never ignore minimum optical power limits. The ZYGO ZMI4104 requires at least 0.07 µW to operate reliably. Degraded fibers or dirty optical connectors can drop the signal below this threshold, causing intermittent position dropouts.
❗ Verify the VME64x backplane compatibility. This is a 6U VME64x card. Forcing it into a standard VME backplane without proper 64x P2 connector alignment will result in missing data lines and communication failures.
❗ Check the cyclic error compensation setting. This board features proprietary cyclic error reduction. Ensure this option is enabled in your configuration software, as disabling it will introduce inherent non-linear errors into your high-precision measurements.
❗ Mind the system expansion limits. While a single board handles 4 axes, the chassis power supply and backplane bandwidth must support the total load. Pushing a single chassis to the 64-axis maximum requires strict power budgeting.
Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
| Original Model | Replacement / Successor Model | Compatibility Level (Direct/Needs Adaptation) | Migration Notes |
|---|---|---|---|
| ZMI 2400 Series | ZYGO | Direct | Drop-in upgrade; adds 4-axis density and 0.15 nm resolution |
| ZMI 4000 Series | ZYGO | Direct | Same VME64x footprint; verify laser compatibility |
| ZYGO 7701 Laser | ZYGO | Needs Adaptation | 7701 is standalone; 4104 requires 7702/7714/7724 sources |
- Position Resolution: 0.15 nm resolution ensures uncompromising accuracy for semiconductor and optical manufacturing.
- Tracking Speed: ±2.55 m/s maximum speed maintains 0.2 nm accuracy even during high-velocity stage movements.
