At work i have to mount an encoder wheel onto a machine to monitor the meters of product going into the machine, i need to order an encoder to go with an encoder wheel i have aquired. the wheel is 500mm. After one full revolution of the wheel i need my monitor screen to read 50, once 2 revolutions have been completed (1 meter) the screen would read 100 and then turn into 1 for 1 full metre. So when ordering my encoder i will need to consider the pulses per revolution (PPR). Am i correct in thinking this value would need to be 50?

thanks.

 

the wheel is 500mm.

Is that 500mm in circumference?

So when ordering my encoder i will need to consider the pulses per revolution (PPR). Am i correct in thinking this value would need to be 50?

Or some multiple of 50 as you can always divide the pulses down with a digital counter.
How will you generate the display value?

 

Do you realy mean that the encoder wheel has a cercumference of 500 mm (159.15mm Dia.) It seems very large for an encoder wheel. An encoder wheel will already have either radial bands or holes in it and the number of these give the number of pulses per revolution. When you say "encoder" do you mean the optical read head to convert the bands or holes passing it into electrical signals ? Or do you mean the electronics to display the pulses from an encoder wheel and it's read head ? You would normally buy thr encoder wheel and read head as a single unit . (Such as this one.) It would be unusual to find one with as few as 50 pulses per revolution. (The one in the link gives 600) As long as the encoder has a multiple of 50 pulses per revolution it can easily be divided down in the display electronics. So to use the encoder in the link directly linked to a wheel with a 500mm cercumference you would divide the number of pulses by 12.

Les.

 

What is the equipment that you are inputting the encoder to?
"monitor screen" etc?
Some systems will allow a scaling value based on the count/rev of the encoder etc.
Max.

 

By the encoded wheel I mean a mechanical wheel that will be fixed to the shaft of the encoder, like the one in the link below.
https://uk.rs-online.com/mobile/p/encoder-measuring-wheels/3372415/

I already have a counter device setup, however the encoder for this setup was broken. When searching for the part number of the encoder it says it is a programmable incremental encoder Upto 10,000ppr. I'm just not entirely sure of what required ppr I would need .Maybe I'm just over confusing my self.
Thanks for the help.

 

That does not appear to include a encoder, mentions made by Hengstler who make quadrature encoders, these are a dual 90° apart square wave and the four edges can be used to increase the resolution x4.
That link does not appear to include any encoder.
Again, what is the system the measuring means is input to?
Max.

 

I have a kubler codix counter set up to an encoder mounted on a hinge the optical read head is attached to a mechanical wheel 500mm circumference. I was basically just wondering if I could simply replace the encoder and keep the rest of the setup

 

If this is like most Batch counters, the input resolution is programmable. This appears to be a simpler one, can you program the resolution?
If so you order a simple low count encoder and program the resolution accordingly.
The manual should tell you.
Max.

 

I did a search for "kubler codix counter" but the company seems to make many different models. I think the best information will come from the manual on the encoder that failed. The wheel that you refferred to as an encoder wheel I would just consider it as a wheel with a circumference of 500mm. (It does no encoding itself.) Can you post some more information on the encoder that failed. I have not seen an encoder that you can change the PPR value. (Other than with a quadrature encoder which you can decode with 1, 2, or 4 pulses per line that Max describes in post #6)

Les.

 

Ok Great, cheers. Here's the encoder that was faulty
https://uk.rs-online.com/mobile/p/p...VyaQYCh0yAQRmEAAYASAAEgJJ0vD_BwE&gclsrc=aw.ds

 

That encoder was programmable, what you could use is a 500p/rev encoder and it would read in MM.
A 500p encoder should be easy to locate.
Max.

 

By the encoded wheel I mean a mechanical wheel that will be fixed to the shaft of the encoder, like the one in the link below.
https://uk.rs-online.com/mobile/p/encoder-measuring-wheels/3372415/

I already have a counter device setup, however the encoder for this setup was broken. When searching for the part number of the encoder it says it is a programmable incremental encoder Upto 10,000ppr. I'm just not entirely sure of what required ppr I would need .Maybe I'm just over confusing my self.
Thanks for the help.

That's a tracking wheel for mounting on an encoder shaft. It's normally used to measure distances of materials being fed or coming out of a machine. The wheel works through simple friction by pressing it against the material. The wheel is attached to the encoder itself. Usually, that sort of friction measuring technique is not very accurate.

 

That encoder was programmable, what you could use is a 500p/rev encoder and it would read in MM.
A 500p encoder should be easy to locate.
Max.

Yeap, programmable, and quite pricey (£262.73)... on a side note, even when using a wheel matching its circumference to an adequate ppr encoder, an adjustment factor when computing traversed distance is normally necessary to compensate for normal wear and/or inaccuracies in the follower wheel itself...

 

I can't see any information on the data sheet on configuring the encoder for different PPR values. The video on the link to the RS web page does talk about programming the various parameters. It requires the use of a programming tool. (Either a PC interface or stand alone tool.) There could be a problem if you can't read the configuration data from the old encoder.
Edit.
This is a link to the programming tools an RS's website.
Les.

 

@Doddsy321 A lot depends on your counter as to if it is scale-able type, if so the value of encoder output is not critical.
Also do you just need a read out or want a control output function at a certain value?
I have worked on a similar process that @cmartinez mentions for a sheet steel cut-off machine that would operate a shear after so much material length had been fed into the shear.
Max.