Re: [CAD_CAM_EDM_DRO] Re: please help........

you dont have to be so hostile about it!
i never said that i wasnt taking anyones advice. after
all, that is why i belong to this group to get advice
and to give it if i can.
thanks tim

--- Rick E <skykotechnologies@...> wrote:

>
> Ouch....
> On the 5/8 inch ballscrew being whippy. I bet I
> know why the poster wanted to use that particular
> diameter....for some reason it happens to be the
> cheapest by far (both 1/2 and 3/4 are much more
> expensive from MSC or Mcmaster-carr). I was going
> to build a gantry using a 5/8 inch
> ballscrew...secured at both ends of course. Mine
> was only going to have a travel of 30 inches by 24
> inches...I wonder how whippy that would have been at
> high speeds.
> Tim Goldstein wrote:You line of thinking is a false
> economy. Virtually none of the parts from
> one machine will work right on the next unless you
> are going to design from
> scratch to use them. You state that your next
> machine will be a large
> gantry. So what are you going to do with this one
> puny ball screw? Also
> gantry's tend to need high travel speeds and a 5/8"
> ball screw is pretty
> whippy for that.
>
> Finally, you are looking to convert this first
> machine in a way that will be
> far less than optimum. If you don't capture the far
> end of the lead screw it
> will whip if you are going to have any rapid above a
> snails pace. You want
> to mount everything in places that will not let the
> force be applied evenly.
> You don't want to hear the advise of people that
> have done what you are
> looking to do.
>
> OK, here is the advise I think you want to hear.
> Fabulous idea. Go for it
> and take lots of pictures. Keep us updated on your
> progress.
>
> There you feel better about the project now?
>
> Tim
> [Denver, CO]
>
> ----- Original Message -----
>
> > why would i spend all the time to convert the
> machine
> > and then disassemble it and sell it??? because i
> may
> > decide to build a large gantry mill and use the
> > components. thats the whole reason for not wanting
> to
> > also modify the ballscrew, as it is not machined
> at
> > the far end.
> > by capturing the far end of the screw, i assume
> you
> > mean with a mounted bearing of some sort. as i
> just
> > stated, its not machined an that end.
>
>
>
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