Module for encoder measurement?

[Marwan-S]

Hello,

I was choosing an encoder for my project the other day but I don't know which module to look for. I really appreciate anyone's assistance of this matter.

Please find the link below for the encoder specifications.

http://www.encoder.com/literature/datasheet-260.pdf

Thanks.

[johnsold]

UnknownStudent,

Is that a student who is trying to remain anonymous or a student of the Unknown?

None of us know which encoder will work for your project. Why? Because you did not tell us any of the details about what the encoder is intended to measure.

You need specifications on resolution, speed, temperature range, mounting method, connections, physical environment, and several other things to decide which encoder it correct for your application.  As a student you need to learn how to interpret the project requirements and transform those into useful technical specifications.  Then you learn to read the datasheet to select the appropriate device.

Lynn

[Zach-H]

I beleive you'll be looking for digital input card capable of measuring the the frequency of the waveforms comming out of your encoder. 

You'll need at least two digital input channels and a input sampleing rate at least as fast as you expect the endcoder's output. 

Are you planning on powering the encoder off of the module? or will you have an external power source? 

[Marwan-S]

I am planning to power the encoder off the module. I was thinking of a analog input module that measures voltage with a sampling rate that is at least twice as face as the encoder. As far as I know, the encoder produces two analog signals out of phase 90 degrees not digital signal.

[Marwan-S]

Thank you for information, I already know all of these. Its has not commutation and its front clamp thru bore. It has a an operating temperature from 0 to 70 C, 10,000 CPR, standard maximum frequency.

Now I am not sure with the connector type. Should I go for the M12 body mount? In other words, is there a module that have a M12 5-pin or 8-pin connection interface?

[Zach-H]

The encoder samples in Cycles per revolution or (cycles x 4 😃 Ticks per revolution. A tick is a digital signal either high or low. Ticks per revolution is the number of times you will recieve a digital value per 360 degrees of revolution. 10,000 CPR will give you 40,000 ticks per revolution which is almost 112 ticks per degree... Not sure if you'll need that much accuracy. There will be two signals out of phase inorder to determine which direction the encoder is being rotated. You can read a digital signal with an analog card but it would be easier to do digital edge counting espcially with the freqency that many CPR will produce. Here is a good link to encoder basics: http://www.bisque.com/help/theskyV6/Telescope/Encoder_Basics.htm 

[Marwan-S]

There are many to choose from, which one do you think is the best? 

[Zach-H]

Could you be more specific? We've been discussing encoders, digital input cards, and analog cards. 

[Marwan-S]

I am talking about digital input cards if we assume that the encoder have the same sepcifications as above but with 3,000 CPR.

[Marwan-S]

I am confused on which one to choose. Is it a sinking or sourcing digital input module? From my expierence, the sourcing provides the voltage and the sinking provides the ground. In my case, I am planning to attach this module to a NI cDAQ-9191 Chassis so the module will be powered by the chassis and the encoder is going to be powered by the module.