US Digital E4P encoders and CIMple gear box

[swapnil94]

Your kit includes two E4P-360-250-D-H-D-B. These are miniature optical encoders with two-channel quadrature outputs. They are 360 codes per revolution and fit on a 0.25" shaft. See the E4P web page.

That is from http://www.usdigital.com/first
It says maximum shaft size is 1/4". But they are suppose to fit on CIMple gear box. now the output shaft of CIMple gear box, where encodere is attached is 3/8"
http://www.andymark.com/product-p/am-0740.htm

Diameter of small end: 0.374 inch

So how are they suppose to fit?
And if they do fit then they should fit directly on CIM's output shaft since the diameter of that shaft is 5/16" right? And are E4P able to keep up with 1:1 CIM full power?
Thanks

[Kevin Sevcik]

Originally Posted by swapnil94

That is from http://www.usdigital.com/first
It says maximum shaft size is 1/4". But they are suppose to fit on CIMple gear box. now the output shaft of CIMple gear box, where encodere is attached is 3/8"
http://www.andymark.com/product-p/am-0740.htm

So how are they suppose to fit?
And if they do fit then they should fit directly on CIM's output shaft since the diameter of that shaft is 5/16" right? And are E4P able to keep up with 1:1 CIM full power?
Thanks

I'm pretty sure the small end diameter referred to on that AM page is the small bearing seat before the further step down to the encoder shaft. I haven't run across any AM shafts that don't have the proper 1/4" shaft for an encoder, if they have one.

And yes, if properly installed, the E4P is easily capable of keeping up with the output of the CIMple box.

[swapnil94]

Originally Posted by Kevin Sevcik

I'm pretty sure the small end diameter referred to on that AM page is the small bearing seat before the further step down to the encoder shaft. I haven't run across any AM shafts that don't have the proper 1/4" shaft for an encoder, if they have one.

And yes, if properly installed, the E4P is easily capable of keeping up with the output of the CIMple box.

Yeah I checked cad file and it is just like you said. Is there any way to attach those encoders on 5/16" shaft? Thanks

[slijin]

Originally Posted by swapnil94

Yeah I checked cad file and it is just like you said. Is there any way to attach those encoders on 5/16" shaft? Thanks

No. The E4P is not designed for shafts greater than .250".

There are three options to read the RPM on a 5/16" shaft:

• link it to an idler wheel with a .250" output, and have the encoder read that
• turn down the encoder end of the shaft to .250"
• buy another encoder designed for 5/16" shaft

[swapnil94]

Originally Posted by slijin

No. The E4P is not designed for shafts greater than .250".

There are three options to read the RPM on a 5/16" shaft:

• link it to an idler wheel with a .250" output, and have the encoder read that
• turn down the encoder end of the shaft to .250"
• buy another encoder designed for 5/16" shaft

Thanks!
I think we will turn down the end of the shaft to 0.250". since they have tolerance of 0.020" we just need to turn it down by 1 mm. Filing the ends should do it.