Parker: Manual Rotary Positioning Stages 4575/M4575 Series
Daedal precision rotary stages are
utilized whenever manually controlled rotation or precise angular positioning
are needed. The primary components include: a stationary base; a pre-loaded
angular contact main bearing; drive mechanism. and rotating top.
Rotary Positioner Principles
Parker Daedal rotary stages and
tables produce controlled rotation and angular positioning
Tangent Arm Drive
With some stages (models 2520, 2525,
4575), the drive mechanism is a tangent arm drive. Angular rotation, with this
system, is controlled by three control knobs. The release knob disengages the
shaft from the drive, freeing the table to be rotated by hand to a desired
location. The release knob is then tightened to re-engage the drive mechanism
and transfer control to the adjustment knob which, when rotated, produces
precise angular positioning of the shaft and table top. The locking knob can
then be used to positively lock the table at the desired setting.
Precision Worm Gear Drive
A precision worm gear drive is
employed as the drive mechanism for the other Parker Daedal stages. A worm
wheel (gear), which is attached to the table shaft, meshes with the worm drive,
whose shaft extends out of the housing. Controlled rotation of the worm shaft
creates precise angular rotation of the worm wheel and table shaft. The worm
gear and shaft are matched sets and are preloaded to remove backlash. This type
of drive provides high resolution (180:1) and continuous angular positioning
over a full 360° range.
Standard Features
Parker Daedal has engineered all of
its rotary positioners with emphasis on construction and detail. The resulting
stages exhibit outstanding quality and proven, reliable performance. All models
are manufactured on the very best automated equipment, skilfully assembled, and
thoroughly inspected and tested. This enables units manufactured in production
quantities to satisfy critical performance specifications. All Parker Daedal
rotary positioning devices feature:
• Aluminium/steel construction
• Protective black anodize finish
• Low-friction rotary adjustment
• Precise/accurate movement
• Trouble-free operation
Series 2500 rotary positioners offer
low-friction rotary positioning, quick manual table top rotation, precise
angular adjustment at any selected position, and positive locking. These
miniature units have a preloaded angular contact ball bearing system which
provides smooth, continuous rotary movement.
Model 4575/M4575 Combination Linear/Rotary Stage
The model 4575 combines both linear
and rotary motion into one compact unit. It is designed for applications where
space restrictions do not allow stacking a linear stage and a rotary stage. The
mounting surface is 2.38” diameter with a 0.75” diameter thru hole, with (4)
#10-32 threaded mounting holes on 2.00” centers.
Linear travel is provided by a fine
resolution micrometer. Rotary travel is provided by a tangent arm drive
offering both a coarse and a fine adjustment. This feature allows quick
rotation over a continuous 360˚ range, plus precise angular adjustment at any
selected position.