RE: someone help me please..........

Kayla,

Unless I don't understand you correctly, I think that this is an impractical
solution. Look at it this way :

In your standard mill the nut is attached to the centre of the saddle. This
nut is also in the centre of the leadscrew when the saddle is at the centre
of its travel. This gives you a total possible saddle movement equal to the
length of your leadscrew (half a leadscrew length in each direction).

Moving the point of attachment to the far end of screw travel (left-hand
side) means that when your saddle is travelling to the right, the nut will
be at the centre of the leadscrew when the saddle reaches it limit of
travel.

On the other hand, movement to the left will be restricted because the nut
is already at the far left-hand end to begin with. This means that you will
need a longer than normal length of leadscrew to enable your saddle to
travel to its left limit. This extra length will be protruding unprotected
from your machine.

Unless of course I didn't understand your proposition correctly.

Regards,
Deon Styger.

Ps: A friendly word of advise: Typing everything in lowercase makes your
message more difficult to read. This is called "whispering" as opposed to
"SHOUTING". A lot of people ignore messages typed entirely in either upper-
or lowercase. You might get a better response next time if you take this
advise to heart :-)


---Original message----

> Date: Tue, 08 Oct 2002 06:25:04 -0000
> From: "Kayla Sanders" <tattoos4unme@...>
> Subject: someone help me please..........
>
> ive converted a mini mill to cnc and i have a larger desktop mill
> that i want to convert too cnc also.
> is it possible to mount the ballnuts onto the saddle in the far end
> of screw travel on the saddle?you know, one end supported by the
> thrust bearings in the motor mount side and the other supported by
> the ballnut attached to the saddle on the left in order to keep from
> drilling too many
> holes and in the saddle and keeping the mill as "stock" as possible.
> in case i decide to sell it down the road as it was when purchased.
>
> i was also thinking of doing it this way in order to eliminate the
> need for a bearing opposite the motor/handle end of the screw, and
> have only angular contact bearings on the screw, at the motor/handle
> end. would this work??
> the ballscrews are a decent size (5/8th dia. double row, 22" Lng)
> rated for more than i anticipate on putting to them.
>
> does anyone see me having any problems only using the ballnut and
> the thrust bearings on the motor mount side for attaching the
> ballscrew assembly??
>
> thanks for any and all replies
>
>

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