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 Post subject: Rotory position sensor
PostPosted: Sun Sep 12, 2010 1:23 am 
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Citizen

Joined: Mon Aug 30, 2010 2:06 am
Posts: 7
I have been playing around with a MLX 90316 rotory poistion sensor. Comes in many flavors, I chose the PWM out version.
There is also Analog and SPI. This uses a magnet for position, so there is no mechanical wear like a pot wiper.
Very good repeatablity and linear. Easy to set up using pulsin command.

Have fun!


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 Post subject: Re: Rotory position sensor
PostPosted: Wed Sep 15, 2010 4:45 pm 
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Joined: Thu Mar 01, 2001 7:00 pm
Posts: 1316
Location: Temecula, CA
I believe we used the same part when we created a test setup for Servos (torque and position). We used the sensor to read the position accuracy. The beauty of the PWM version is you can setup a capture pin to do 99% of the work of reading the encoder for you in hardware. A simple interrupt can then gran the last pulse reading.

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 Post subject: Re: Rotory position sensor
PostPosted: Thu Sep 16, 2010 12:10 am 
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Master

Joined: Mon Aug 18, 2008 1:26 am
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Location: CA bay Area
Acidtech wrote:
A simple interrupt can then gran the last pulse reading.

For "gran" did you mean "grab"?

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 Post subject: Re: Rotory position sensor
PostPosted: Thu Sep 16, 2010 1:00 am 
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Master

Joined: Tue Jun 22, 2010 9:15 pm
Posts: 228
Digikey's got the 8-pin SOIC part, what sort of fixture did you make up to keep it centered over the servo's shaft, and to hold the magnet?

MLX90316EDCCT-ND

Alan KM6VV

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 Post subject: Re: Rotory position sensor
PostPosted: Fri Nov 28, 2014 8:16 am 
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Joined: Fri Nov 28, 2014 8:15 am
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Digikey's got the 8-pin SOIC part, what sort of fixture did you make up to keep it centered over the servo's shaft, and to hold the magnet?

MLX90316EDCCT-ND


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 Post subject: Re: Rotory position sensor
PostPosted: Sat Nov 29, 2014 6:19 pm 
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Joined: Thu Mar 01, 2001 7:00 pm
Posts: 1316
Location: Temecula, CA
We had a custom metal bracket made at a local machine shop. The bracket held the sensor in the correct positions. If you dont want to do that you could probably use 3 pieces of wood and cut/drill out one so the servo could mount in it and the sensor in the other. Third peice would be the base.

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