Correct non-linear mechanical position errors on a multi-axis system

Used In:

  • High-end application solutions
  • Wide variety of capabilities for total motion control
  • Designed for both simple applications and the power user
  • Brings powerful graphical and textual tools for motion engineering, based on standardized platforms and protocols
  • Choose your preferred software development platform
  • Integrated with the Elmo Application Studio enabling a single access point

The G-MAS correct mechanism axis positions based on preset data that is accessed using a user-defined correction table. Such corrections are possible for both single and multi-axis applications.

The EASII Error Correction dedicated tool allows an automatic measurement, implement and experiment of error correction tables for single and multi-axis high end solutions.

Both 2D and 3D corrections are supported:

  • 2D error correction provides a correction point (x,y) on the basis of a standard two-dimensional grid, defined as a function of any two axes positions. The correction point handles the error for a specific axis.
  • 3D error correction is similar to 2D error correction, but enables use of multiple, layered two-dimensional grids. As in the 2D mode, the third axis correction point may be defined for any of the axes.

G-MAS error correction supports up to 6 two-dimensional tables and up to 100,000 tabulated correction positions.
Correction points can be calculated automatically by the EASII application studio or pre-defined by the user during general setup.

Error Mapping EASII Tool – Settings

Error correction settings for the Drive and G-MAS:

Error Mapping – Experiment

EASII measures the error correction points and automatically generates a table:

Application solution example:

A Nano-metric system in micron units before and after Error Correction

Before:

After:

Design Features

  • Simple implementation using correction tables, stored in G-MAS flash memory for quick loading/saving
  • Easy to implement by error correction tool
  • Supports up to 6 two-dimensional tables and up to 100,000 tabulated correction positions
  • Uses linear interpolation between each two subsequent correction positions
  • Supports decimal or binary grid gap
  • Each axis can be corrected as a function on its own position and an additional axis position, or as a function of two additional positions
  • Superimposed Error Correction Support
  • Automatically generates a table correction with the Experiment tool

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