Re: [CAD_CAM_EDM_DRO] Updated DRO using screw threads not pulleys

It was an HP plotter with about 18" by 18" travel and accuracy and
repeatability were excellent.
Darrell

----- Original Message -----
From: <JanRwl@...>
To: <CAD_CAM_EDM_DRO@egroups.com>
Sent: Friday, August 18, 2000 8:44 PM
Subject: Re: [CAD_CAM_EDM_DRO] Updated DRO using screw threads not pulleys


> In a message dated 8/17/00 11:42:36 PM Central Daylight Time,
> dgehlsen@... writes:
>
> << An old plotter that I had used a drum and coated wire to move the pens.
the
> wire was fixed at the center of the drum and when the pen was at one
limit,
> one half of the drum was full and the other half was almost empty. That
way
> the wire always traveled in the same place on the drum.
> Darrell >>
>
> Darrell: Was that a Varian brand? I had an old Varian with that
mechanism,
> and it worked fine, but I don't think I'd advocate it for "CNC"! For
> plotting on PAPER, it was fine. For DRO? I don't think the
"repeatability"
> would be worth a dang.
>
>
>
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