Re: [CAD_CAM_EDM_DRO] Screw Size----Stepper Size?

Hi Mike,
I am surly no expert on cnc routers but the size of equipment you are
describing sounds more like metal working machinery than sized for foam
cutting. Seems to me what you need is more on the order of a very heavy duty
plotter with a cutting head. Maybe a laminate cutter would do. Seems to me
that the table could be very light and easy to move thus cutting way down on
motor and lead screw sizes. If sagging of the 10 ft screw is a problem
using a smaller diameter screw it possible to build in supports for the
screw that move with the ball nut. This was the practice on long machinery
in years gone past.
Think about it.
Doug

----- Original Message -----
From: "surfbuilder2003" <mek0002@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, November 24, 2003 8:26 AM
Subject: [CAD_CAM_EDM_DRO] Screw Size----Stepper Size?


> Hey evryone....I have been having great feedback, thanks to all. I
> have also been looking through the faq page and have been getting
> some good info from there. I am starting to look for screws and
> steppers now. However, I do not want to make any critical mistakes
> and buy the wrong sizes. My table is going to be 10' x 4'. I have
> gotten some suggestions on my large screw. I heard it needs to be 10'
> x 1.5" and I need at least a size 42 stepper motor to turn it. I want
> to connect all these directly, no belts or chains. I heard they dont
> last as long and make everything run slower and less precise. For my
> y axis I am going to get a 4' x 1" screw but do not know what size
> motor. And my z axis alls I know is I probably want a 2' screw but
> dont know what diameter or size motor. There will not be much
> pressure on the bit as alls I will be cutting is foam. Thanks in
> advance for any help.
>
> Mike
>
>
>
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