Baumer_EAM580_360_SAE_J1939_MA_EN_Rev0003.0000h_Index0002.docx Baumer Electric AG
06.08.2018 10/27 Frauenfeld, Switzerland
4.3.5 Electronic gear function
The electronic gear function divides the position value by the gear factor. Therefore it transforms the position value into
the view of the application:
ππππππππ‘πππ πππ ππ‘πππ =
πππππππ πππ ππ‘πππ
π
The gear factor (i) is defined as followed:
π =
πΊπππππππ’π1
πΊπππππππ’π2
There are three objects that should be configured to use the electronic gear function.
0x2001-1 Enable
Set this object to the value β2β to enable the electronic gear function, while the value β1β disable it.
0x2001-2 Gear Value 1
This Object defines the numerator of the gear factor.
The range of this integer value is 1β¦32767.
0x2001-3 Gear Value 2
This Object defines the denominator of the gear factor.
The range of this integer value is 1β¦32767.
Figure 1: Example configuration of gear values
obj 2001h-3h
GearValue2
eg. 8 teeth
Example
discrete gear with number of teeth
obj 2001h-2h
GearValue1
eg. 17 teeth
Motor
Gear
gear ratio i
=
6.25
1
=
625
100
obj 2001h-2h
GearValue1
eg. 625
obj 2001h-3h
GearValue2
eg. 100
i = 6.25
Example
gear box
Encoder
Encoder
Application
Application
Limitations
A useful gear ratio is greater than 0.125, while a gear ratio smaller than 1 may result in higher signal noise.
The maximum encoder turns in unpowered operation must be smaller than 2
29
(536β870β912) turns.
The electronic gear function is useful for multiturn encoders. In case of singleturn encoders, the position value gets lost
after a power cycle.
4.4 Encoder as standard component with embedded software used in safety functions
If this standard encoder is used in safety functions, please request the according βApplication Note MAGRES EAMβ for
further information.
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