Re: [CAD_CAM_EDM_DRO]Screw drive

I too am perplexed at what the thing looks like, but I guess that the
three screws are set so the heads act like threads in the larger
leadscrew.

Since I didn't see any reference to bearings, the unit would wear
quickly.

Dave





--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Jason Cox" <sinergy@o...>
wrote:

> Hello,
>
> Is there anywhere I can see a picture of a screw drive?
>
> Thanks.
>
> Jason.
>
>
> ----- Original Message -----
> From: Tony Jeffree <tony@j...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Friday, March 28, 2003 10:55 AM
> Subject: Re: [CAD_CAM_EDM_DRO]Screw drive
>
>
> > As a rough guide, something of the order of twice the diam of the

screw or

> > less.
> >
> > Regards,
> > Tony
> >
> > At 18:08 27/03/2003 -0500, you wrote:
> > >Tony,
> > >can you give me an idea of a ball nut diameter for 3/4'' drive

screw?

> > >Alex
> > >
> > >----- Original Message -----
> > >From: Tony Jeffree <tony@j...>
> > >To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> > >Sent: Thursday, March 27, 2003 6:30 PM
> > >Subject: Re: [CAD_CAM_EDM_DRO]Screw drive
> > >
> > >
> > > > Even so, still significantly bigger than a ball nut.
> > > >
> > > > Regards,
> > > > Tony
> > > >
> > > > At 17:24 27/03/2003 -0500, you wrote:
> > > > >Actually it can be made much smaller by making outside

screws of

> smaller
> > > > >diameter
> > > > >then drive screw.
> > > > >Alex
> > > > >----- Original Message -----
> > > > >From: Tony Jeffree <tony@j...>
> > > > >To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> > > > >Sent: Thursday, March 27, 2003 11:36 AM
> > > > >Subject: Re: [CAD_CAM_EDM_DRO]Screw drive
> > > > >
> > > > >
> > > > > > At 10:56 27/03/2003 -0500, you wrote:
> > > > > > >Folks!
> > > > > > >Yesterday I stumbled upon "Model Engineer's Workshop"

magazine.

> > > > > > >Besides other interesting staff there was an article on

making

> your
> > >own
> > > > > > >screw drive as a replacement for a ball screw.
> > > > > > >I'm amazed at how easy and inexpensive is to make this

kind of

> > >drive -
> > > > > > >basically its an arrangment of three short screws,

belonging to a

> > >nut,
> > > > > > >around the drive screw. One short screw can be tightened

to

> adjust
> > > > > > >the backlash.
> > > > > > >It looks like anyone can make this kind of drive in a

matter of

> > >hours.
> > > > > > >Cheap too.
> > > > > > >Alex
> > > > > >
> > > > > > Yes - that looked like a neat idea. However, the downside

is that

> they
> > > > >take
> > > > > > up *a lot* more space than the equivalent ball screw.
> > > > > >
> > > > > >
> > > > > > Regards,
> > > > > > Tony
> > > > > >
> > > > > >
> > > > > >
> > > > > > Addresses:
> > > > > > FAQ: http://www.ktmarketing.com/faq.html
> > > > > > FILES:

http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/

> > > > > > Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
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> wanliker@a...,
> > > > >timg@k...
> > > > > > Moderator: pentam@c... indigo_red@q... [Moderators]
> > > > > > URL to this group:

http://groups.yahoo.com/group/CAD_CAM_EDM_DRO

> > > > > >
> > > > > > 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
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> > > > > >
> > > > >
> > > > >
> > > > >
> > > > >Addresses:
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> > > > >FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
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> wanliker@a...,
> > > > >timg@k...
> > > > >Moderator: pentam@c... indigo_red@q... [Moderators]
> > > > >URL to this group:

http://groups.yahoo.com/group/CAD_CAM_EDM_DRO

> > > > >
> > > > >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/
> > > >
> > > > Regards,
> > > > Tony
> > > >
> > > >
> > > >
> > > > Addresses:
> > > > FAQ: http://www.ktmarketing.com/faq.html
> > > > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> > > > Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
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wanliker@a...,

> > >timg@k...
> > > > Moderator: pentam@c... indigo_red@q... [Moderators]
> > > > URL to this group:

http://groups.yahoo.com/group/CAD_CAM_EDM_DRO

> > > >
> > > > 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/
> > > >
> > > >
> > >
> > >
> > >
> > >Addresses:
> > >FAQ: http://www.ktmarketing.com/faq.html
> > >FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> > >Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
> > >
> > >Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
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> > >List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com,

wanliker@a...,

> > >timg@k...
> > >Moderator: pentam@c... indigo_red@q... [Moderators]
> > >URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> > >
> > >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/

> >
> > Regards,
> > Tony
> >
> >
> >
> > Addresses:
> > FAQ: http://www.ktmarketing.com/faq.html
> > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> > Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
> >
> > Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> > Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> > List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com,

wanliker@a...,

> timg@k...
> > Moderator: pentam@c... indigo_red@q... [Moderators]
> > URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> >
> > 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/

> >
> >