OSRC :: Θέμα: Gimbal Encoders (1/1)

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ΘΕΜΑ: Gimbal Encoders

Gimbal Encoders 11 Χρόνια 12 Ώρες πριν #217

JasTra
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I saw you were using optical encoders for the gimbals. These are quite expensive and fragile.

Have you considered using magnetic encoders like the ic-MH (12 bit resolution- various output formats e.g. ABZ) from ic-haus.de? These are definetelly cheaper and much more robust than optical encoders. The absolute position can also be read out on startup, so you don't need to go to the limits on startup.

It sounds like you are using multiturn (gearing) though so maybe the absolute feature may not be usable for you.

Flyer: www.ichaus.de/upload/pdf/MH_flyer_rev3a.pdf
Data Sheet: www.ichaus.de/upload/pdf/Mh_b1es.pdf

They also have other encoders with other output formats. (eg. Sin-Cos)

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Gimbal Encoders 11 Χρόνια 6 Ώρες πριν #218

OSFlyerWiz
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Hi,

Thank you for the post. I shall definitely look into these components.

Ilios - Building Open Innovation

I welcome everyone to participate in Ilios discussions, stories, projects and other related content as well as contribute in any way possible to make the project a truly helpful and versatile tool for everyone to use and constantly improve.

Yours, Demetris Z.

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Gimbal Encoders 10 Χρόνια 11 Μήνες πριν #219

JasTra
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I saw that there is also a new 14 bit version from Austrian Microsystems:
www.ams.com/eng/Products/Magnetic-Positi...tion-Sensors/AS5048A
Might even be possible to do away with your gearing. 60degrees of motion would get you about 2700 resolution steps. (I2C, SPI, PWM, Absolute Position - non contact)

Other Links:
batchpcb.com/pcbs/15089 (Open source servo pcb for AS5046)
www.renishaw.de/de/magnetic-encoder-modu...otentiometers--10832

Would make a good robust (but maybe more expensive) digital Potentiometer wich could probably easily be software defined to be multiturn or single turn.

Regards.

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