| Goniometers rotate an object about an axis in space located outside
the body of the unit, so the axis is not obscured by the unit itself.
Goniometers have small travel range, than rotation stages, and increased
stability.
Goniometers have to have different heights of points of rotation,
so that when you stack goniometers one on top of the other, they
rotate an object about a common point in space. The center of rotation
is over the center of the platform.
Platform of 8MG99 has a grid of seven M6 mounting
holes spaced by 25x50mm.
Body of 8MG99 has a square footprint. So goniometers are easy to
stack.
Clearance
holes in the base of 8MG99-50 match
mounting holes on
the platform of 8MG99-80. You put mounting screws into the clearance
holes through the access holes in the platform. This way you can
easily stack goniometers or mount them on other units, like translation
and rotation stages.
The mechanism rolls smoothly on ball bearings.
The position is read within one revolution on the scale engraved
on the dial knob mounted on the axle of the motor. Position can
be read to each step. Overall position accounting is up-to your computer.
The stage is driven by a stepping motor. A dial knob on its
axle allows manual drive. We use stepping motors Berger Lahr RDM253/50
(version B), or equivalent. The motors have 200 steps per revolution, and
they are in bipolar wiring. We offer our Step Motor Controller Cards 8SMCC1
(1 axis) and 8SMCC3 (3 axis) to control the motorized stages.
Goniometers have two limit switches to signal an "out of limits"
error situation. The switches may also be used to roughly establish
a zero reference. Precise position may be established visually.
Goniometers are made of black finished steel.
Specifications
Travel range....... ±2.5°
Resolution
8MG99-50..... 16.12"
8MG99-80..... 10.96"
Height of center
of rotation
8MG99-50..... 50 mm
8MG99-80..... 80 mm
Load capacity...... 2 kg
Weight............. 1.2 kg |
 8MG99 stacked
8MG99-50
8MG99-80 |
Motorized Positioners & Controllers