Re: [CAD_CAM_EDM_DRO] One dump encoder pulse question more...

I believe Rutex indicates that their drives will handle the differential
encoders.
Jim

----- Original Message -----
From: "Harvey White" <madyn@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Saturday, August 30, 2003 11:08 AM
Subject: Re: [CAD_CAM_EDM_DRO] One dump encoder pulse question more...


> On Sat, 30 Aug 2003 17:16:20 +0300, you wrote:
>
> >Hi, to all
> >
> >I just tested pair of new encoders I got cheaply.
> >The encoders are made in Taiwan by Hontko Co. Type is: HTR-HB-8-1024-3-L.
> >Spec says they are 5V, 1024 pulses per rev, with line driver cirquit.
> >When I hook them up top my new oscilloscope I got nice differential
pulses whitout problem but the edge of pulse is only 3,3V which maybe is too
low for my Rutex drives.
> >Does enyone know if I can make similar pull up with 5v and resistor as
step and dir pulse line sometimes need?
>
> If they are differential, then they need to go through a line receiver
> to convert them to single ended. Alternatively, you can use 1/4 of
> an LM339 as a receiver. Differential was not necessarily made to have
> a full ttl swing.
>
> but you might be able to pull them up, depends on what the output
> drivers are.. If they are differential outputs from a chip, they
> probably were not made to have a full ttl range.
>
> Harvey
>
>
> >
> >Thanks in advance,
> >
> >Regards Mika.
> >
> >[Non-text portions of this message have been removed]
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