Beginners screws ( was ACME ( was Re: leadscrew,

Hi Alex,

I'm not exactly sure if this is the whole table or one side.

A note here is that you have 2 bearings that keep the table laigned
in the center, laying horizontal. This would require locating 2
angles very precicly.

if you installed the bearings on one angle, then all you need to is
make sure one is straight.

But I think you are making it too complicated, a box frame of 2"
square steel will not flex easily.

bolt on a 1/4 x 1/2 steel plate as a spacer and a 1/2 x 1" plate as a
runner. bearings top and bottom would carry the load. or you could
run bearings directly on the steel.

then if you did the same plate on plate thing on the top or bottom,
you could have side to side controlled.

all you need it a drill press to put in all the holes.

Dave

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "alex" <telecomt@t...> wrote:
> Dave,
> its in a files - "turret punch press folder", called "linear.jpg".
> Alex
> ----- Original Message -----
> From: turbulatordude <davemucha@j...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Wednesday, May 21, 2003 10:41 AM
> Subject: [CAD_CAM_EDM_DRO] Beginners screws ( was ACME ( was Re:
leadscrew,
>
>
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "alex" <telecomt@t...>
wrote:
> > > OK,
> > > just uploaded the file of DIY linear guide.
> > > It is done for somebody with limited machining capabilities, but
> > with
> > > burning desire to learn CNC, like myself.
> > > Alex
> >
> >
> > where did you put it ? files ? photo's ?
> > folder name ?
> > file name ?
> >
> >
> >
> >
> >
> > >
> > >
> > > ----- Original Message -----
> > > From: CL <datac@l...>
> > > To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> > > Sent: Monday, May 19, 2003 10:47 PM
> > > Subject: Re: [CAD_CAM_EDM_DRO] Beginners screws ( was ACME (
was Re:
> > > leadscrew,
> > >
> > >
> > > >
> > > >
> > > > alex wrote:
> > > >
> > > > >Thank you, Ross - I'm more or less sure now what to do.
> > > > >Will place sprocket directly on the shaft of stepper, then
pull
> > carriage
> > > in
> > > > >a loop by the chain.
> > > > >
> > > > You might want to slide that sprocket in a little further so
you
> > can at
> > > > least get a smidget of support on the end of that motor shaft
> > with an
> > > > outbound bearing....
> > > >
> > > > It still is not enough, but that would be better than nothing.
> > > > Most steppers are not made to take much of any side load on
their
> > > bearings.
> > > >
> > > > Ultimately, you need to put the sprocket between two bearings
on
> > a shaft
> > > > that is driven direct by the stepper with a Helical coupler.
> > > > Or, mount the motor to a short section of square aluminum
tubing
> > with a
> > > > bearing on each side. One bearing can be right on the motor
> > shaft, the
> > > > other on an extension with the Sprocket.
> > > >
> > > > That obviously takes more work.
> > > >
> > > > Then again, if motors are cheap enough, just replace the motor
> > when it
> > > > goes "south".
> > > >
> > > > Chris L
> > > >
> > > >
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> >
> > OFF Topic POSTS: General Machining
> > If you wish to post on unlimited OT subjects goto:
> aol://5863:126/rec.crafts.metalworking or go thru Google.com to
reach it if
> you have trouble.
> > http://www.metalworking.com/news_servers.html
> >
> > http://groups.yahoo.com/group/jobshophomeshop I consider this
to be a
> sister site to the CCED group, as many of the same members are
there, for OT
> subjects, that are not allowed on the CCED list.
> >
> > NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY
POSTING THEM.
> DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> > bill
> > List Mom
> > List Owner
> >
> >
> >
> > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> >