RE: [CAD_CAM_EDM_DRO] Re: automated "labjack"

If you really want something good and cheap then supply a set of stationary
somethings that your board can register against for height, use some soft
tubing laying flat (think fire hose) on either side, along the edge, under
the board. Clamp one end of the tubing and pressurize the other end. The
tubing will become round again and will clamp the board upward against the
somethings. I�ve use the basic idea to clamp wooden and metal parts that
didn�t lend themselves to clamping by conventional means for machining. It
spreads the clamping force over a larger area and doesn�t damage the parts.

R. Wink



_____

From: CAD_CAM_EDM_DRO@yahoogroups.com
[mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Graham Stabler
Sent: Friday, March 30, 2007 1:54 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Re: automated "labjack"



--- In HYPERLINK
"mailto:CAD_CAM_EDM_DRO%40yahoogroups.com"CAD_CAM_EDM_-DRO@yahoogroups.-com,
"David G. LeVine"
<dlevine@...-> wrote:

> A simple question: How fast, how often and how
> much weight need to be handled? If it is a light
> load, a tiny electric motor with gear reduction
> and a cam system might be best. Two or four
> small wires are pretty simple to add to the head
> cabling. Limit switches would make it 4 wires,
> mechanical stops and current sensors would work.
>
>

Well I have some tygon, if that can be used that would be OK.

I wondered about a small motor, if I do put the auger drive on a
spline then there is very little weight to move, I'm sure even a tiny
rc servo could handle it.

Graham




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