Re: [CAD_CAM_EDM_DRO] NEWBIE WITH PLASMA/ROUTER ??'s

Jay,

Where in Texas are you located. There is a lot of help here in North Texas
(DFW area.

Bob Campbell
www.campbelldesigns.com

----- Original Message -----
From: "Jay" <jayelvington@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Wednesday, July 02, 2003 9:07 PM
Subject: [CAD_CAM_EDM_DRO] NEWBIE WITH PLASMA/ROUTER ??'s


> Howdy from the state of Texas where things are supposed to be
> bigger. That saying unfourtunately does not apply to my budget.
>
> A little back ground for those who care.
> I am a degreed form a large state university in Agricultural Systems
> Management (read: plant and production management for rednecks) with
> a minor in electrical engineering technologies. MY current job is
> with the R&D dept. of a company that produces high voltage circuit
> breakers. I do mechanicla design of large and small mechinisms.
>
> I currently want to build a CNC router/ plasma table. This will be my
> first CNC project. It stems from several intrest and needs rolling
> into one. I am leting my knowledge of Micro processor design and
> Electronic theory slip. I have , after many request, started building
> cuatom bumpers for vehicles. This leaves much diamond plate to be
> cut. I like the idea of learning new things and honing the ones I
> have.
>
> So on to the list of questions.
> 1. I have decided to do rack and pinion. I think this is the easy
> to fit in my non budget ( I am getting married at thanksgiving)
> I want to about 14.5 vs 20 PA. It seems from what I know that the
> 14.5 would seem to be quieter, smoother, more apt to want to push
> horizontially on the rack as opposed to up? Is this the case.
> What DP of gears do you all prefer Size of racks?
>
> 2. I would think that you could make a gantry style table with the
> gantry stiff enough to only need to drive one side. Obvisouly a
> router has a resitve load. Do I need to drive both sides?
>
> 3. How smooth and level does the table for the object being cut need
> to be? How smooth and level does the surfaces for the gantry to ride
> on need to be?
>
> 4. How bout acuracy? Is +/- .03 feasible with a rack and pinion set
> up? Can you cheaply get it better? I know every thing perfect a
> spur gear with a 16 DP should give you something like .003 backlash?
> This would be more than good enough for any thing I do. I also know
> its not a perfect would and the demon of stacking tollerances learks
> near.
>
> The good news is my company has an employee purchase program so I can
> order form our vendors at close to our bulk prices. I have a good
> friend that is an excelent machinist and has offered much help just
> cause it sounds like an interesting project. I have 3d software and
> can use it to drawn my plans. Im young and am willing to let thei
> take a life time.
>
>
> I have another idea in mind when this is done. Bout a 3 axis plasma
> cutter to cut fishmouth in tubing and pipe.
>
>
> Pour on the help :) I am will be more than willing to share my
> ignorance...
>
>
> Jay Y.
>
>
>
>
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