Our traditional brass goniometers are available in 15-, 25-, 40-, 60- and 65-mm square platform sizes. The brass material ensures exceptionally smooth low friction movement. They are available with either dovetail bearings or with v-groove bearings for inverted use. The drive screw incorporates a high-tolerance worm-gear mechanism which yields angular position readable to less than 12 arc minutes using the Vernier scale. As with all goniometers, the axis of rotation is situated parallel to and above the mounting platform. OptoSigma goniometers of like-size are designed to be stacked so that they have intersecting orthogonal axes of rotation. In this configuration, they have capability for orbit-like positioning about a single point. The GOH series of goniometers are lockable and finished in a flawless RoHS-compliant super black chrome.
GOH 2-axis dovetail goniometers are made from solid brass and are available in 25-, 40-, 60- and 65-mm square platform sizes. They are driven by a high-tolerance worm-gear mechanism which yields angular position readable to less than 12 arc minutes using the vernier scale. As with 1-axis goniometers, the axis of rotation is situated parallel to and above the mounting platform.
GOHB goniometers are all-brass stages having standard 40- and 60-mm platforms with higher than average rotation-axis heights. They are driven by a high-tolerance worm-gear mechanism which, along with its high precision v-groove guides, yields rotation-axis accuracy less than 50um. As with all goniometers, the axis of rotation is situated parallel to and above the mounting platform but they are also designed to be stacked so that they have intersecting orthogonal axes of rotation. In this configuration, they have capability for orbit-like positioning about a single point. The GOTB series of goniometers are lockable and finished in a RoHS-compliant black chrome.
Features:
High precision, high load capacity and high stiffness.
High Load Capacity and High Stiffness
- The four-array contact structure achieves high load capacity and high stiffness (13 times stiffer than the V groove) As shown in Fig-1, ball guides are machined across the arcs so that they have R groove structure and good contact with a ball allowing stable load capacity against the load in the directions where contact with the ball occurs frequently.
High Durability
- Long life and free of maintenance Fig-2 shows the pressure distribution of the R groove and the flat surface. As shown in the figure, pressure exerted on the R groove is dispersed and does not reach inside. Thus, metal fatigue and wear are reduced. Data for durability is listed. E015
High Precision
- Our original processing technology achieved an integral structure of the main body and the guides. As shown in Fig-3, because the crossed roller type goniometer stage, which has been the mainstream, has the guide
separate from the main body, there are many parts. Assembling a large number of parts caused errors or variation, resulting in translation errors, that is, deviation in the most important rotation center when the stage moved. Our goniometer stage as shown in Fig-4, has the guide integrated into the main body in order to compensate for assembly errors or variation by machining accuracy. With the integral structure, the displacement of the rotation center is reduced.
