Aerotech’s ASR1200 series is an extension of the successful
ASR1000 direct-drive rotary stage. The ASR1200 adds an integral
pneumatically-operated collet chuck for automated material handling
and a sealed water jacket for wet cutting processes.
Integral Collet Design
The collet chuck on the ASR1200 accepts ER161 series collets.
These collets are readily available in sizes that support tube
diameters from 0.5 mm to 5.8 mm. The collet is retained with a
threaded retaining cap that enables quickchangeover. The collet
is configured in a “fail-safe” mode where full clamping
force is applied when no air pressure is present. Air is delivered
to the rotating collet assembly through a custom-designed frictionless,
seal-less rotary union. This 100% noncontact rotary union design
ensures a lifetime of maintenance-free operation. The combination
collet chuck and rotary union also has significantly less friction
and inertia than external assemblies created from discrete parts.
This reduced inertia improves system performance by allowing higher
peak acceleration and reducing position error during laser machining
operations.
Fluid Delivery System
The ASR1200 includes a fluid delivery system and seal assembly
to support wet cutting processes. The rear of the unit has a quick
release fitting for fluid input and an NPT thread that allows
the user to customize the length of the “water jacket”
to match the length of the tube material. Inside the ASR1200 is
an O-ring assembly that seals the tubing against the I.D. of the
ASR1200 shaft. This seal assembly rotates with the tubing, eliminating
troublesome torsion-induced errors that are present when working
with thin-walled tubing or extremely flexible materials such as
Nitinol.
Direct Drive
The ASR1200 series utilizes direct-drive brushless motor technology
to maximize positioning performance. Direct-drive technology is
optimized for 24/7 production environments because there are no
brushes to replace and no gear trains or belts to maintain. Direct
drive also provides quicker acceleration and higher top speeds
than gear- or belt-driven mechanisms yielding higher total overall
throughput.
The low maintenance and high throughput characteristics of the
ASR1200 provide a stage that yields the lowest total cost of ownership
while the integral water jacket and pneumatic collet provide unmatched
levels of integration and ease of use.
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