Re: [CAD_CAM_EDM_DRO] Re: Quadrature Divider ?

Thanks,

I looked at that datasheet but did not see it, I must be going blind.

Thanks,
Pete.

----- Original Message -----
From: henrikolsson2001
To: CAD_CAM_EDM_DRO@yahoogroups.com
Sent: Wednesday, January 07, 2009 11:52 AM
Subject: [CAD_CAM_EDM_DRO] Re: Quadrature Divider ?


Peter,
There's a datasheet on the CUI Inc website where they state:

7500rpm for 2048, 1000, 800, 384 ppr
15000rpm for 1024, 500, 400, 192 ppr
30000rpm for 512, 250, 200, 96, 256, 125, 100, 48 ppr

Here's the datasheet:
http://www.cui.com/pdffiles/AMT102-V.pdf

Although not that hard to make yourself there's also a ready-made
line-driver cable assembly available for a reasonable $7.15.

/Henrik.

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Peter Reilley" <micrio@...>
wrote:
>
> I wonder about these encoders. I cannot find a specification for
their
> maximum speed. There is a description of how they work on the web
site.
> They use a capacitive pickup against a wavy pattern on the encoder
wheel.
> There appears to be about 8 waves per rotation. That means that
> they are multiplying the 8 waves by various factors to get all
their selectable
> resolutions. This technique probably limits their maximum speed.
I am
> suspicious that they don't specify it anywhere that I can find.
It could be
> fairly low!
>
> Pete.





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