User guide

Homing Methods CME 2 User Guide

198 Copley Controls

E.1: Homing Methods Overview

There are several homing methods. Each method establishes the:

 Home reference (limit or home switch transition or encoder index pulse)

 Direction of motion and, where appropriate, the relationship of the index pulse to limit

or home switches.

E.2: Legend to Homing Method Descriptions

As highlighted in the example below, each homing method diagram shows the starting

position on a mechanical stage. The arrow line indicates direction of motion, and the

circled H indicates the home position. Solid line stems on the index pulse line indicate

index pulse locations. Longer dashed lines overlay these stems as a visual aid. Finally,

the relevant limit switch is represented, showing the active and inactive zones and

transition.

Index Pulse

Positive Limit

Switch

Starting position

Axis

Sw itch inactive Sw itch active

Sw itch transition

Index pulse location

Direction of motion

Mechanical Stage Limits

Home position

Starting position

Note that in the homing method descriptions, negative motion is leftward and positive

motion is rightward.