Rotary stage RTHM-174
The RTHM series rotary stages provide arc-second resolution when driven from a micro-stepping or a brushless servo motor controller. The low profile design is made possible by the use of compact precision bearings. The rotating carriage of the stage provides continuous rotation of load up to 10 kg and has large clear aperture to allow the passage of the optical path or cables directly through the stage. The main body of the stages is made from lightweight anodized aluminum and can attach directly to an optical table or moving linear or XY actuators and can be mounted at any orientation. A precision worm gear assembly is used to transfer the rotary motion of the stepper motor into rotary motion of the carriage. The small size allows use in confined spaces, such as laser cavities, disk texturing machines, manufacturing areas for fiber optical components or semiconductor manufacturing.
Vacuum compatible rotary stages RTHM-174 and RTHM-190 are avaibale to operate at 10-6 Torr vacuum.
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 Rotary Table RTLA-30-100 RTLA-30-100
Diameter 100 mm Height 45 mm Load 5 Kg |
 Rotary Table RTLA-60-200H RTLA-60-200H Diameter 200 mm Height 83 mm Load 50 Kg |
 Rotary Table RTLA-90-200M RTLA-90-200M Diameter 200 mm Height 60 mm Load 30 Kg |
 Rotary stage RTHM-151 RTHM-151
Diameter 60 mm Aperture 30 mm Height 29 mm |
 Rotary stage RTHM-50-100J RTHM-50-100J
Diameter 100 mm Aperture 50 mm Height 35 mm |
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Parameter |
Unit |
RTHM- 174 |
RTHM-190 | |||||
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Rotation range |
deg |
Continuous 360◦ |
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Resolution (Note1) |
Arc-sec Deg |
36 to 0.1 0.01 to 0.00004 |
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Max speed (Note 2) |
RPM |
10 RPM |
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Repeatability (unidirectional) |
Arc-sec |
15 |
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Eccentricity |
micron |
5 microns (-P grade) 10 microns (-H grade) |
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Load capacity axial / radial |
Kg |
6/2 |
3/1 |
10/2 |
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Stage weight |
Kg |
0.6 |
0.5 |
0.65 |
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Motor type |
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Stepper motor (standard) Servo motor (optional) |
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Encoder (Note 3) |
Counts/rev |
128 to 5,000 |
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Drive mechanism |
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Ground worm gear |
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Gear ratio motor/stage |
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180:1 |
120:1 |
180:1 |
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Off-center moment |
Nm |
0.5 |
1 |
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Home sensor |
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Cherry DH3C-B1LA |
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Construction |
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black anodized aluminum |
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Note 1 |
Programmable in the drive |
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Note 2 |
Driver voltage and resolution dependent |
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Note 3 |
For NEMA 17 motors |
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