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
> >
> >
> > Addresses:
> > FAQ: http://www.ktmarketing.com/faq.html
> > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
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