Re: Screw Size----Stepper Size?

Hello erie,

$10,000 is about our budget, give or take. Precision does not have to
be right on. They will have to be finish sanded once it comes of the
cnc table. I heard that timing belts will slow down the process. I am
a little concerned with time and speed. Someone told me to support
the screw on both ends and something else to help reduce inertia so
it wont be a pain to stop and start. What do you think.

Thanks
Mike


--- In CAD_CAM_EDM_DRO@yahoogroups.com, Erie Patsellis <erie@s...>
wrote:

> Mike, I would seriously consider fixed end timing belts, or rack &
> pinion. What is your desired resolution and budget?
>
> erie
>
>
> surfbuilder2003 wrote:
>
> >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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