High resolution rotary encoder: Raspberry Pi or Arduino?

[niekb]

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 second).

1. What would be my best option? (I am a beginner) Raspberry Pi, or Arduino ( I am concerned Arduino is not fast enough)
2. Does anyone have experience with high resolution encoders? What would be a good place to find such rotary encoders?
3. I found a couple of encoders, but they use a SSI interface, or a BiSS interface. Can I use these interfaces with Raspberry Pi?

Any help is greatly appreciated!

Thanks!!

Niek

[joan]

I'm not sure about an Arduino.

It should be within a Pi's capabilities.

10923 encoder transitions per second, say 50000 edges per second, should be OK.

No problem sending 600 UDP updates per second over wifi, I routinely send circa 100,000 messages per second over TCP.

[niekb]

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 luck so far.

What is your experience with the 'reliability' and performance of the wifi connection with Raspberry Pi at one end (for instance lag)? I realize that the answer is probably highly depending on the amount of data, quality of the network (I am using a dedicated network for this), but any ideas would be appreciated.

Niek

[joan]

I think at 2 rotations per second you are getting into a doubtful region for the Pi. My own feeling is that it would probably work, but without much spare margin.

I hadn't heard of BiSS/SSI before now.

I only use wireless in a home situation and don't suffer any problems.

I guess you might be in an industrial environment and that is outside my experience.

[maxplex]

Hi,
I need to read a rotary encoder using SSI or BiSS. Just wondering if you got this up and running Neik

[DougieLawson]

Hi,
I need to read a rotary encoder using SSI or BiSS. Just wondering if you got this up and running Neik

Don't hold your breath waiting for a reply. Neik hasn't visited the forum since "Tue 17 Dec 2013, 23:16".