Medium load hexapod provides precision and versatility

3rd January 2018
Source: PI
Posted By : Lanna Cooper
Medium load hexapod provides precision and versatility

With the usability of 6-axis hexapods increasing in research and industry applications, PI has introduced a medium load 6-axis precision motion platform, the H-825 hexapod. The H-825 provides a self-locking load capacity up to 30kg (66lbs). The motion range is up to 55mm (linear) and up to 38° (rotation). High system precision is guaranteed by absolute encoders and an actuator resolution of eight nanometers - with position repeatability of ±0.1µm and ±2µrad, respectively.

Parallel-kinematic design
The parallel-kinematic design of the hexapod makes it smaller and stiffer than traditional 6-axis positioning systems while providing a higher dynamic range.

The parallel kinematic design (all actuators working in parallel on one moving platform) does away with issues caused by moving cables - a decisive advantage in terms of reduced friction and reliability.

Long life motors and absolute encoders for reliability and efficiency
The brushless servo motors employed in all six hexapod struts provide the long lifetime required in industrial precision positioning and alignment applications. The new hexapod also features absolute measuring position encoders, eliminating the need for referencing the system during power up. 

Absolute encoders also ensure that any operation can be continued seamlessly in case of a power interruption.

Controller/software
PI hexapods come with controllers and software tools based on 25 years of hexapod R&D, resulting in fast solution implementation to a plethora of applications from medical to photonics.

All 6-axes can be commanded simply as Cartesian coordinates, and the centre of rotation can be changed on the fly with a software command.

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