Rotary stage RTHM-190

Rotary stage RTHM-190
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Diameter 92 mm

Aperture 50 mm

Height 36 mm

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.

 

image_RTHM174_vacuum       image_RTHM190_vacuum

Parameter

Unit

RTHM-

151

RTHM-

174

RTHM-190

 

 

 

Rotation range

deg

Continuous 360◦

Resolution

(Note1)

Arc-sec

Deg

36 to 0.1

0.01 to  0.00004

Max speed

(Note 2)

RPM

10 RPM

Repeatability (unidirectional)

Arc-sec

15

Eccentricity

micron

5 microns (-P grade)

10 microns (-H grade)

Load capacity 

axial / radial                                 

Kg

 

6/2

 

3/1

 

10/2

Stage weight

Kg

0.6

0.5

0.65

Motor type

 

Stepper motor (standard)

Servo motor (optional)

Encoder

(Note 3)

Counts/rev

128  to 5,000

Drive mechanism

 

Ground worm gear

Gear ratio motor/stage

 

180:1

120:1

180:1

Off-center moment

Nm

0.5

1

Home sensor

 

Cherry DH3C-B1LA

Construction

 

black anodized aluminum

Note 1

Programmable in the drive

Note 2

Driver voltage and resolution dependent

Note 3

For NEMA 17 motors

 

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