QS-7 OPD Galvanometer Scanner
Excellent for Laser Marking
The QS-7 OPD 
Galvanometer combines strong performance with cost-effective value. Our moving-magnet mechanical design incorporates our exclusive ceramic ball-bearing motors that are combined with our high output position detectors. Patented low inertia optical detectors achieve dynamic performance with faster, more accurate positioning. When integrated with Nutfield’s QD-4000 Servo Amplifier, the QS-7 OPD scanners deliver excellent speed and accuracy.
Nutfield Tech’s mechanical design uses low resistance/low induction coils for increased scanning speed and optimized thermal characteristics. Our OPD generates 4 times the output signal for high signal/noise ratio and outstanding accuracy.
Contact Nutfield Technology for assistance with identifying a solution for your scanning application.
Key features of the QS-7 OPD Galvanometer Scanner:
7mm and 10mm apertures
260 µs Step Response with 7mm mirror; 350 µs with 10mm mirror
Low Drift – 50ppm
High Linearity – 99.8%
High Resolution
Excellent RF Noise Immunity
Available as galvanometer, single-axis scanner,or XY scan set, open-frame head, and packaged head
Specifications for the QS-7 OPD Galvanometer Scanner:
| Specifications: | Value |
|---|---|
| Rotor Inertia | 0.1736 gm-cm² |
| Torque Constant | 40,000 dyne-cm |
| Coil Resistance | 1.3 ohm |
| Coil Inductance (@ 1kHz) | 76 µh |
| Weight (without cable) | 36 g |
| Inertial Load: | |
| Recommended | 0.17 gm-cm² |
| Maximum | 0.85 gm-cm² |
| Position Detector: | |
| Linearity* | >99.8% @ ±20° |
| Gain Drift | up to 50 ppm/°C (3 sigma) |
| Offset Drift | up to 30 µrad/°C (3 sigma) |
| Repeatability | up to 10 µrad (3 sigma) |
| Typical output signal | |
| differential mode | 14.5 µA/° |
| common mode | 151 µA |
| Supply current | 15 - 20 mA |
| * For larger angles, contact Nutfield Tech. | |
| Dynamic Performance: | |
| Step Response Time | |
| (1% of full scale, 99% settled) | |
| 7mm X Mirror | 260 µs |
| 10mm X Mirror | 350 µs |
| Cable lengths available: | 7" to 24" (0.18m to 0.61m) |
| Storage Temperature: | -10 to 50°C |
| Operating Temperature: | 0 to 40°C noncondensing |
| All specifications are using Nutfield Tech's QD-4000 Servo Amplifier @ ambient condition. Specifications subject to change without notice. |
Specifications subject to change without notice.
Nutfield’s QS-7 OPD Galvos support the following applications:
- Marking
- Imaging
- Micromachining
- Microscopy
Accessories available for the QS-7 OPD Galvanometer Scanner:
- Cables – available lengths 7″ to 24″ (0.0178m to 0.610m)
- QD-4000 Servo Amplifier
Documentation for the QS-7 OPD Galvanometer Scanner:
- Nutfield Technology’s OPD Galvanometer Scanners Data Sheet
- Nutfield Technology’s QD-4000 Servo Amplifier Data Sheet
U.S. patents apply to this product. For details, visit our Virtual Patent Marking page.