SICK EtherNet/IP AFS60 User Manual

When the encoder is switched off, the offset – the delta between the real position
value and the value specified by preset – is saved. When switching on again, the
new calculated position value is formed from the new real position value and the
offset. Even if the encoder was turned further during the switched-off state, the correct
position value is output as a result.
3.3.3 Round axis functionality
The encoder supports the gear function for round axes. Here, the steps per revolution
are set as a fraction (see "Preset function", page 13). This allows a number that is not
2ⁿ-fold the steps per revolution or/and a decimal number (e.g. 12.5) to be configured
as the total resolution.
NOTE
The output position value is calculated with a zero point correction, the set code
sequence and the entered gear parameters.
Example with transmission ratio
A rotating table for filling bottles is to be controlled. The steps per revolution are
specified by the number of fillers. There are nine fillers available. 1000 steps are
required for precise measurement of the distance between two fillers.
1
2
3
4
Figure 2: Example of position measurement on a rotating table with transmission ratio
1
Rotating table with nine fillers
2
Diameter of round table: 125 cm
3
Encoder mounted on an axis together with the drive wheel.
4
Diameter of drive wheel: 10 cm
The number of revolutions is given by the transmission ratio of the rotating table drive
(125/10 = 12.5).
The total resolution is thus 9 × 1000 = 9000 steps, to be realized in 12.5 revolutions
of the encoder. This ratio cannot be realized via the steps per revolution and the total
resolution, since the total resolution is not 2ⁿ-fold the steps per revolution.
The problem of the application can be solved with the round axis functionality. Here, the
steps per revolution are disregarded. The total resolution and numerator and denomi‐
nator of the number of revolutions are configured.
9000 steps are configured as the total resolution. The numerator of the number of
revolutions is configured as 125, the denominator as 10 (125/10 = 12.5).
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PRODUCT DESCRIPTION
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O P E R A T I N G I N S T R U C T I O N S | AFS/AFM60 EtherNet/IP 8014213/1EF3/2021-12-08 | SICK
Subject to change without notice

SICK EtherNet/IP AFS60 Specifications

General

Brand	SICK
Model	EtherNet/IP AFS60
Category	Media Converter
Language	English