Re: [CAD_CAM_EDM_DRO] Re: Optical mouse for DRO anyone?

On Sun, 22 Apr 2007 21:29:10 +1000, you wrote:

>> Better with a turn or two around a biggish roller and a
>> spring loaded tensioner arm roller to maintain the friction.
>> That's how a cable company I did some work for measured
>> length of fibre optic, wires and Kevlar string going into the
>> winding machines. The output after PVC coating and printing
>> used a simple opto to count the 1 metre markers printed on
>> the cable sheath.
>>
>> Steve Blackmore
>
>
>That'll help with his next problem. If he's cutting 100 foot lengths, then
>there's a nice big heavy roll of cable around somewhere...
>
>I don't think I've seen cable marked with metre markers like that. I know
>most cable has writing that repeats every foot (occasionally converted to
>sort-of metric so you count 3 times to get a metre). Not really useful if
>you're trying to automate something.

Your not likely to see cable like that unless you go underground, climb
pylons or go deep sea. It wasn't domestic type stuff. Printing can be
done however the customer wants, but the markers are there for technical
reasons.

The roller idea works fine, the tension only has to be large enough to
keep it from slipping on the roller.

Steve Blackmore
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