Re: [CAD_CAM_EDM_DRO] Beginners screws ( was ACME ( was Re: leadscrew,

----- Original Message -----
From: turbulatordude <davemucha@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Wednesday, May 21, 2003 11:57 AM
Subject: [CAD_CAM_EDM_DRO] Beginners screws ( was ACME ( was Re: leadscrew,


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

Yes , its only one stage, the stroke is about 3'.
>
> 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.

Basically one angle is a base, put in place in advance. Then I put second
angle
trying to "lock" an assembly.
>
> 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.

So plates just slide one agains other in one direction?
>
> 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.

Can you drop a scetch of this arrangement?
It is probably a very good idea, but a bit hard to visualize.

>
> Dave
Regards, Alex
>
>
>
>
> --- 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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> > > http://groups.yahoo.com/group/jobshophomeshop I consider this
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> there, for OT
> > subjects, that are not allowed on the CCED list.
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timg@...
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>
> OFF Topic POSTS: General Machining
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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........
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> List Mom
> List Owner
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>
>
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