The 8MRL182 series rotary stage is based on 3 phase servo/BLDC
torque frameless ultra thin motor. Direct drive design enables:
backlash less motion control, low friction, ultrahigh bandwidth,
smooth velocity, exceptional accuracy, and ultrahigh precision.
Unique torque motor technology ensures low cogging, low total
harmonic distortion and smooth motion with low position error.
Disc type optical encoder located directly on the moving part,
allows reading angular position with down to 0.00000067055 °
angular resolution. Ultra-precise crossed roller bearing system
ensures 0.26 arcsec RMS bi-directional repeatability, while
calibrated absolute angular accuracy is ±1.50 arcsec.
The rotary stage can be operated in raster scan mode by
commanding small increment steps or continues rotation as a
trajectory component.
| Model | 8MRL182-20 |
| KINEMATICS & FEEDBACK INFORMATION |
| Travel range, deg | ±360 |
| Encoder type | Optical |
| Encoder model | LEn5 |
| Encoder resolution, deg | 0.0000006705523 |
| Encoder interface | 1Vpp analog or RS422 digital |
| Encoder internal multiplier | Optional |
| Encoder multiplication factor | ×4 to ×65536 |
| Encoder grating period, µm | 40 |
| Encoder reference mark (index) | YES |
| Absolute accuracy (before calibration), µrad/arcsec | ±267 / ±55 |
| Absolute accuracy (after calibration), µrad/arcsec | ±7.27 / ±1.5 |
| Uni-directional repeatability , µrad/arcsec | TBD |
| Bi-directional repeatability (RMS), µrad/arcsec | ±2.42 / ±0.5 |
| Bi-directional repeatability (RMS), µrad/arcsec | ±1.26 / ±0.26 |
| Excentricity, µm | ±5 |
| Wobble, µrad/arcsec | ±12.12 / ±2.5 |
| Maximum velocity (no load @ 300 VDC), deg/s / RPM | 3330 / 555 |
| Maximum acceleration (no load), sdeg/s2 | 250000 |
| LOAD, GUIDING & TRANSMISSION INFORMATION |
| Design type | Torque motor stage (Direct drive) |
| Motor model | TM5 |
| Motor design type | Torque motor |
| Maximum bus voltage, VDC | >320 |
| Maximum continuous current, APK | 4.6 |
| Maximum Peak current, APK | 7.3 |
| Maximum Continuous torque, Nm | 15.7 |
| Maximum peak torque, Nm | 21.7 |
| Number of poles | 36 |
| Load capacity (central), kg | 50 |
| Load capacity (radial), kg | >10 |
| Moving mass, kg | 0.6 |
| Guiding system | 2 × Crossed roller bearings |
| MATERIAL AND ENVIRONMENT CONDITIONS |
| Housing material | Aluminum alloy |
| Housing coating (finish) | Black anodizing |
| Environment pressure | Normal atmosphere |
| Operating temperature, °C | 20 ± 2 |
| CONTROL, COMMUNICATION AND CABLING |
| Recommended controllers | 8SMC5-USB or ACS Product Line |
| Recommended drivers | 8SMC5-USB or ACS Product Line |
| Recommended power supply | 1 phase / 3 phase source |
| Built-in communication interface | EtherCAT / RS232 / USB / TCP-IP |
| Cable length, m | 2 (on request) |
| Differential outputs | On request |
| ACCESSORIES INFORMATION |
| Base plate for mechanical interface | Not required |
| OxOy stack | Angle bracket required |
| Z configuration | N/A |
| ADDITIONAL DETAILS |
| Precision cam chuck | Available with 8MRL184 version |
| Precision collet holder | Available ER25 |
| Dimensions of moving platform (D), mm | ø180 |
| Stage dimensions (W × L × H), mm | 218 × 180 × 75 |
| Measurement system | Metric / Imperial |
| Weight, kg | TBD |
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