Re: Need Help Slewing issues

Joe Zeglinski

Hi Dean.

In the olden days of mainframes and minicomputers, serial cables were commonly sold upto a maximum 25 foot standard length, at 1200 baud I believe, because that was just about the "limit of reliable communications" (ANS standard), depending on baud rate - unless you ordered special "shielded twisted pair", which typically would go 50 to 100 feet at high baud rates of about 9.6 KB, (or you used four wire or even two wire current loop comms, which were good for a couple of miles, or even differential pair RS-432/429 ).

So, I am not surprised that the 25 foot cable dropped command characters to the servo, especially at 19.2 KB, or even 9600B from the laptop.


----- Original Message -----
From: "Dean Salman" <cluster@...>
To: <ap-gto@...>
Sent: Wednesday, October 01, 2008 11:58 AM
Subject: [ap-gto] Re: Need Help Slewing issues

Thanks for the information. Last night I gave him my backup serial
cable and for the first time had no issues, temps were about the same
if not colder. His cable did not look to be the best but also was
very long, maybe 25ft. I don't think distance is an issue and as I
said, even though the calbe seemed ok, it looked worned out.

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