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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