ALAR 机械轴承精密直驱转台 | ALAR Mechanical-Bearing Direct-D

● 5种不同孔径尺寸：100毫米，150毫米，200毫米，250毫米，325毫米
● 轴向载荷能力可达595kg;径向载荷可达680kg
● 优异的精度和可重复性
● 无齿槽效应电机提供平滑运动
● 无随时间变化的齿轮磨损造成的精度改变
● 45-300 rpm 连续转速
● 有真空兼容版本
● 编码器选项

ALAR优点

Now customers can get large aperture rotary stages with zero backlash and no gear wear or gear vibration as is commonly seen in worm-drive stages. The other added benefit is that direct drive is significantly faster than worm drive, so testing can be completed in less time. In production settings, this equates to faster testing, lower cost manufacturing and higher profits. From the standpoint of system accuracy and repeatability, the stage will maintain its performance over time with no need for maintenance because there are no gears to wear out. With higher accuracy and no backlash, customers can produce more accurate products because their test system is now more accurate.

应用

Applications for the ALAR include single and multi-axis electro-optic sensor testing, missile seeker testing, antenna testing, inertial navigation device testing, photonic component alignment, high-accuracy laser machining and precision wafer inspection. These include testing in vacuum to 10-6 torr. These rotary stages can also be configured as multi-axis gimbals.

高速

ALAR stages can operate between 45-300 rpm, depending on the particular model selected. This speed range is significantly higher than gear-drive stages of similar size.

机械设计

Angular contact bearings are used to maximize performance with respect to tilt error, moment stiffness and rotating friction. A precision-machined shaft further minimizes tilt error. The design incorporates integral connections that minimize cable issues. The ALAR works especially well in applications that require 360° continuous motion but have limited space. The stage is 65-160 mm tall and provides smooth motion without travel restrictions.

无刷直驱

To maximize positioning performance, the ALAR series utilizes Aerotech’s brushless, slotless motors. This motor has all of the advantages of a brushless direct-drive motor – no brushes to wear, no gear trains to maintain and high acceleration and high speeds. Since it is a slotless, ironless design, there is zero cogging, meaning there is absolutely no torque ripple. This makes the ALAR ideal for applications requiring outstanding contoured motion, smooth scan velocity or precise incremental steps.

高有效载荷能力和大瞬时载荷刚性

The ALAR comes in two different configurations. The standard profile (SP) unit has high payload capacity and high moment load stiffness so it can handle applications where its rotation axis is parallel or perpendicular to gravity and the payload center of gravity is cantilevered away from the stage. The low profile (LP) unit has high payload capacity and is good for applications where the axis of rotation is parallel to gravity. Both the SP and LP units have the same aperture options and motor options. Either SP or LP stages can handle between 260-1300 lb of axial load.

精确定位

Performance is assured with encoder line counts from 31000 to 76800 per rev, resulting in resolutions from 0.02 arc sec/count to 0.009 arc sec/count. The motor and high-performance rotary encoder are directly coupled to a common shaft. The absence of gear trains and mechanical couplings means no position errors caused by hysteresis, windup or backlash. As a result, accuracy of ±2 arc sec and bi-directional repeatability of ±0.5 arc sec is attainable.

灵活配置

Aerotech manufactures a wide range of servo amplifiers and advanced controllers to provide a complete, integrated package.