Re: [CAD_CAM_EDM_DRO] Re: Encoder Indexer Option

braidmeister wrote:

>3 Questions still floating out there:
>
>1. Is there any reason why I would need an Index feature on the
>encoder for the Bridgeport? Doesn't this have something to do with
>threading/tapping? (I will be running Mach2...is this a moot point?)
>
>

It's not necessary.

>2. If running sheilded lines less than 8 feet long, is there really
>justification to go to a differential encoder? It seems to me that in
>the case of US Digital, that it would be a PITA to convert a shaft-
>type encoder to my motors...The ideal setup would be a hole-thru
>design with a 5/8" encoder.
>
>

I don't think there's justification for it. How well they work will
depend on the situation with this machine and whatever is in the rest of
the shop. As far as I know, most people on this list use single-ended
encoders.

>3. If I did select a differential encoder, is there any bearing on
>the CPR rating? I mean, would there be a difference between a 1000
>CPR non-diff and a 1000 CPR differential?
>
>

No difference in the information, only how it's transmitted (think AM
vs. FM).

>-Brady
>
>

Hope this helps
- Steve