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by niekb
Tue Dec 17, 2013 1:50 pm
Forum: Beginners
Topic: RS422 encoder on Raspberry Pi
Replies: 8
Views: 5024

Re: RS422 encoder on Raspberry Pi

I found a 14bit absolute encoder with a native SPI or/and I2C interface: http://www.ams.com/eng/Magnetic-Encoders/AS5048 One disadvantage of this type of encoder is that it is the chip only, so I need to make a housing for it. Other absolute encoders are available as well, but they have interfaces s...
by niekb
Mon Dec 16, 2013 10:36 pm
Forum: Beginners
Topic: RS422 encoder on Raspberry Pi
Replies: 8
Views: 5024

Re: RS422 encoder on Raspberry Pi

Thanks for your posts, Ivan and Joan, I understand everything a bit better now. So using the GPIOs and proper 5V to 3V3 conversion and reading out channels A and B might do the trick. Indeed, the max rotational speed is crucial (half a rotation per second max), and with the high resolution, I guess ...
by niekb
Mon Dec 16, 2013 9:24 pm
Forum: Beginners
Topic: RS422 encoder on Raspberry Pi
Replies: 8
Views: 5024

Re: RS422 encoder on Raspberry Pi

No, I am aiming for less than that - maybe half a rotation per second (max). Am I even being realistic? I am new to this, and I am trying to learn as much as I can. How difficult would it be to get this working? I am not sure what you mean with an effective divide by 16 (I don't think so by the way)...
by niekb
Mon Dec 16, 2013 8:56 pm
Forum: Beginners
Topic: RS422 encoder on Raspberry Pi
Replies: 8
Views: 5024

RS422 encoder on Raspberry Pi

Hi all, I was hoping if you could help me with the following. I would like to use a Gurley RS119 quadrature incremental encoder and connect it to Raspberry Pi. The data sheet for this encoder can be found here: http://www.gpi-encoders.com/PDF/R119.pdf . So have two questions, hardware and software r...
by niekb
Sat Dec 07, 2013 4:17 pm
Forum: Beginners
Topic: High resolution rotary encoder: Raspberry Pi or Arduino?
Replies: 5
Views: 3743

Re: High resolution rotary encoder: Raspberry Pi or Arduino?

Hi Joan, Awesome, thanks! I noticed that I made a mistake regarding the rotation rate, it should be around 2 rotations per second, so 131072 encoder transitions per second. Is that still possible? Also, can I use SSi or BiSS interfaces with Raspberry Pi for the encoder? I tried to google it, but no ...
by niekb
Sat Dec 07, 2013 2:47 pm
Forum: Beginners
Topic: High resolution rotary encoder: Raspberry Pi or Arduino?
Replies: 5
Views: 3743

High resolution rotary encoder: Raspberry Pi or Arduino?

Hi! I would like to read a very high resolution rotary encoder (16bit, i.e. 65536 counts per revolution), rotating at 10rpm. Then, I would like to send the encoder position to another computer using Ethernet or WiFi (as fast as possible, I would like to send the position via UDP at least 600x per se...

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