Japan, Magnescale
Magnescale BS78 Laserscale
Made in Japan
Manufacturer: Magnescale Co., Ltd.
Model: BS78
Features
- High-resolution scale with signal pitch of approx. 138 nm, outperforming light wave interferometer systems
- High stability, unaffected by humidity, air pressure and air disturbances
- Reference point accuracy : ±0.1 µm
- Scale accuracy : ±0.04 µm (measuring length : 40 mm)
- Non-contact design eliminates return error.
- Measuring length : 40 to 420 mm, 9 types (-R/-RS)
- Measuring length : 10 to 420 mm, 10 types (-N/-NS)
- Special non-magnetic and vacuum-compatible models available
- Using low expansion glass : -0.7 x10-6 °C (measuring length : 10 to 420 mm)
- Resolution : 2.1 pm
Specifications
| Specifications | ||
|---|---|---|
| The Laserscale uses a semiconductor laser. The laser beam is harmful to the human body, so please do not look into the detection head section. | ||
| Model | BS78 | |
| Measuring length | 10 (only N/NS) / 40 / 70 / 120 / 170 / 220 / 270 / 320 / 370 / 420 | |
| Overall length | 58 mm (L = 10 mm : open type scale), L +26 mm (L = 40 mm to 420 mm) L : Measuring length | |
| Max. travel | L + 2 mm (L = 10 mm : open type scale), L +10 mm (L = 40 mm to 420 mm) L: Measuring length | |
| Scale accuracy (at 20 °C) |
|
|
| Grating pitch | Approx. 0.55 µm | |
| Signal pitch | Approx. 0.138 µm (Approx. 138 nm) | |
| Reference point accuracy | ±0.1 µm (Only R/RS type) | |
| Reference point position | At the center, and every 50 mm from the center to the left and to the right (BS78 models with measuring lengths of 320, 370, 420 mm : 20 mm offset from the center at 50 mm intervals) | |
| Reference point detection direction | Single direction | |
| Thermal expansion coefficient | -0.7×10-6/℃ | |
| Light source | Semiconductor laser : Wavelength 790 nm, Output 6 mW | |
| Radiation power | DHHS class 1 | |
| Detection principle | Diffraction grating scanning system | |
| Operating temperature | +10 to +30 °C (no condensation) | |
| Storage temperature | -10 to 50 °C (humidity 60 % or less) | |
| Max. response speed | 400 mm/s | |
