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HSR08 Direct Encoded Rotary Stage

The HSR08 is a high precision, direct encoded, worm gear driven rotary stage.  While most high resolution, direct encoded rotary stages use direct drive servo motors, some applications need the at-position stability offered by a stepper motor.  Other applications benefit from the torque amplification of a gear drive, or the ability to support a torsional load without applying power.  In the configuration pictured above, a 0.45° stepper motor achieves a positioning resolution of better than 0.3 arc-sec.  Bidirectional repeatability is better than ±1.0arc-sec.  Low wobble error and high stiffness is achieved by using precision matched, preloaded angular contact bearings in conjunction with a strong body and hub made of 7075 aluminium.  To ensure the top mating surface of the hub is parallel to the plane of rotation a final machining operation is performed after the stage is assembled.  Indicated runout at the outside edge is typically less than 3μm.

 
NOTE: If you are looking for tighter specs and tolerances, we can customize to your needs.

Specifications
Stage Travel 360°
Rotational Accuracy ±10 arc-sec
Bidirectional Repeatability ±1 arc-sec
Encoder Ring 31,488 Cycles per Revolution
Digital Encoder Resolution, RS422¹ 10.28, 2.06, 1.03, 0.41, 0.21, 0.10 arc-sec
Wobble ±4 arc-sec
Radial Runout (Eccentricity) 3μm
Axial Runout 2μm
Load Capacity 25Kg
Motor Mount NEMA23
Drive Type 90:1 Worm Gear
Home Sensor Open Collector, Logical (170°/190° H/L)
End-of-Travel Limits None

¹Other encoder resolution options available including Sine 1Vp-p
²Test configuration: 0.45° step motor, 0.10 arc-sec resolution encoder
 

HSR08 Direct Encoded Rotary Stage Dimension Drawings