Spindle encoder - will this work?

[ecdez]

I'm working on a Hardinge retrofit with the Acorn and need to order a spindle encoder. Using this for reference as to requirements

Will this work?

https://www.automationdirect.com/adc/sh ... a-2e2500vd


I think my confusion is the wording in the requirements that says "8,000 - 40,000 encoder counts per revolution (2,000 - 10,000 'line' " In my searched I couldn't find where they were specified as either of those; only as "ppr". Sorry if this is an elementary question but this is my first time dealing with a spindle encoder.

Thanks in advance!

[martyscncgarage]

I'm working on a Hardinge retrofit with the Acorn and need to order a spindle encoder. Using this for reference as to requirements

spindle encoder.jpg



Will this work?

https://www.automationdirect.com/adc/sh ... a-2e2500vd


I think my confusion is the wording in the requirements that says "8,000 - 40,000 encoder counts per revolution (2,000 - 10,000 'line' " In my searched I couldn't find where they were specified as either of those; only as "ppr". Sorry if this is an elementary question but this is my first time dealing with a spindle encoder.

Thanks in advance!

You really only need a 1000 line encoder and that is light duty. If you plan on hanging a timing pulley on it, you want at least a medium duty encoder.
In my opinion.
Marty

[AnnArborNate]

Danaher encoder. H23250010403B. 3/8 shaft 5-26V 10ft cable 2500 ppr

I bought one of the above on ebay NIB for 60.00 delivered. It is working perfectly with my Acorn.

NIB/NOS on ebay can get quality indistrial components at a fraction of new cost.

[cncsnw]

In encoder specifications, "ppr" means the same as "lines". The control will see 4x that number of counts for each revolution of the encoder.

See http://www.cncsnw.com/Quadrature.htm for an explanation why.

I agree with Marty that for typical applications (running from a few hundred to a few thousand RPM), a spindle encoder should have around 1000 or 1024 lines.

You can use a light duty encoder, as long as you design a mount with its own shaft, pulley, and bearing, so there is negligible mechanical load on the encoder shaft.

[cnckeith]

viewtopic.php?f=63&t=921

[ecdez]

Apparently I searched the wrong phrase

Thanks for the link and thanks for all the responses. Looks like I'm pointed in the right direction.

[martyscncgarage]

Also, mentioned in a recent thread, you have to watch the encoder max RPM rating

[ecdez]

Good reminder. I will verify before purchase.

Also, someone mentioned earlier about mounting the encoder. The lathe has a bracket for one so any face mount encoder should do the trick without putting too much on the encoder spindle.

[martyscncgarage]

Good reminder. I will verify before purchase.

Also, someone mentioned earlier about mounting the encoder. The lathe has a bracket for one so any face mount encoder should do the trick without putting too much on the encoder spindle.

Show the original encoder and mount. Post a picture....

[ecdez]

I'll get one this afternoon.