Re: new machinest and CNC

Hi Bill,

7x10 is the name on the box. : )

it really does allow 7 inch swing over the ways, if you hold the part
from the inside. but stock over the carrage is limited to about
2.25 inches. The HF 7x10 is measured from the face of the chuck, so
when you add the jaws, you get less, closer to 9"

Grizzley/ENCO/MicroMark and Homier sell 7x12 and are closer to 11"

To measure the lathe, one would remove the chuck, and put in a dead
center in the headstock, pull the tailstock back unitl the rear edge
was at the end of the ways and the tailstock was withdrawn as far as
it would go. then measure betweenthe centers. aka center to center.

when putting Steppers on these small lathes, you can probably get by
with a direct drive on the cross slide and from what I have seen so
far, the choice method is to put a stepper on the leadscrew and let
the carrage stay locked.

if you require thread cutting, it can be done in a number of ways.
but that would be another topic.

Check out www.dakeng.com or the TurboCNC group
http://groups.yahoo.com/group/turbocnc

Dave

--- In CAD_CAM_EDM_DRO@y..., Bill Vance <ccq@x> wrote:
> Hi Dave, jay;
>
> Is 7x10 the actual working volume, or just the max volume available
when you
> lose the tool holder? Lathe measurements allways seem to leave me
a little
> confused, as everyone seems to be refering to, "something else".....
>
> Bill
>
> On Mon Apr 8 09:05:13 2002, dave_ace_me, <davemucha@j...> wrote:
>
> >Hi Jay,
> >
> >Interesting day,
> >are you out Texas way ?
> >
> >You will also find the 7x10 lathes can be fittted by going over to
> >the TurboCNC list. Dave K, the originator of the TurboCNC program
> >did it for his HF lathe.
> >http://groups.yahoo.com/group/turbocnc/messages
> >
> >This is a mechanical adventure. you will need to make some parts,
but
> >when you think about it, all you need are the mounting plates and
> >motors.
> >
> >I'd recomend you visit the 7x10 group, but I already said hello to
> >you over there.
> >
> >You mentioned small parts, the HF/Griz 7x10 lathes are pretty
rugged
> >compared to some of the hobyiest lathes, and may be less
expensive.
> >They may also be a better platform, determine your needs then find
> >the machines that suit them.
> >
> >Dave
> >
> >
> >
> >
> >
> >--- In CAD_CAM_EDM_DRO@y..., "Carol & Jerry Jankura"
> ><jerry.jankura@s...> wrote:
> >> Hi, Jay:
> >>
> >> You might want to cut out the middleman and consider rolling
your
> >own. You
> >> didn't mention the work envelope size you need, but you might
want
> >to
> >> consider either Sherline or Taig. Sherline uses a leadscrew for
the
> >carriage
> >> and offers an optional set of threading gears while Taig uses a
> >rack and
> >> pinion arrangement. Some of the CNC G-Code interpreters (the
> >program that
> >> actually takes the drawing information and turns it into step
and
> >direction
> >> pulses) support the G-33 code that allows a lathe to cut a
thread.
> >>
> >> The pieces you need are:
> >>
> >> Machine tool
> >> Mechanical coupling kit for motors to leadscrews
> >> Motors - stepper or servo
> >> Motor Driver
> >> Computer
> >> G-Code interpreter
> >> DXF to G-Code Converter
> >> CAD program that generates DXF format file
> >>
> >> You can also choose a CAD/CAM package such as VectorCAD/CAM that
> >provides
> >> both the CAD and G-Code conversion services in one piece of
> >software. If
> >> you're on a budget, you can use Intellicad and ACE Converter,
which
> >are
> >> free.
> >>
> >> You might want to join the Sherline and Taig lists to better
learn
> >the
> >> capabilities of their equipment. Some folks will also suggest
the
> >7x10 asian
> >> lathes (several vendors of basically the same product - Grizzly,
> >MicroMark,
> >> Harbor Freight, etc.) and there is a 7x10 list as well, but it
> >seems that
> >> these prouducts are not quite ready for good performance 'out of
> >the box'
> >> but require knowledge, tweaking and access to a machine shop (at
> >least
> >> that's what I inferred when I did my search about a year ago)
which
> >someone
> >> like me does not have.
> >>
> >> Hope this helps.
> >>
> >> -- Carol & Jerry Jankura
> >> Strongsville, Ohio
> >> So many toys, so little time....
> >>
> >>
> >>
> >>
> >> |-----Original Message-----
> >> |From: jay_iski [mailto:jay_iski@y...]
> >> |Sent: Monday, April 08, 2002 12:28 AM
> >> |To: CAD_CAM_EDM_DRO@y...
> >> |Subject: [CAD_CAM_EDM_DRO] new machinest and CNC
> >> |
> >> |
> >> |Hi, I am just starting miniature machining and wish to purchase
my
> >> |equipment with CNC in mind. I worked with electronics for thirty
> >> |years but do not know what components I need for a good CNC
mill
> >with
> >> |roary table and CNC lathe with threading.
> >> |
> >> |I talked to FlashCut and Microkinetics but both want too much
and
> >> |offer no sales engineering.
> >> |
> >> |Any direction or advise is preatly appreciated.
> >> |
> >> |Meanwhile I will read the messages for information.
> >> |Thanks,
> >> |Jay Iski
> >> |
> >> |
> >> |
> >> |Addresses:
> >> |FAQ: http://www.ktmarketing.com/faq.html
> >> |FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> >> |
> >> |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
as
> >> |a sister site to the CCED group, as many of the same memembers
are
> >> |there, for OT subjects, that are not allowed on the CCED list.
> >> |
> >> |
> >> |
> >> |Post messages: CAD_CAM_EDM_DRO@y...
> >> |Subscribe: CAD_CAM_EDM_DRO-subscribe@y...
> >> |Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@y...
> >> |List owner: CAD_CAM_EDM_DRO-owner@y..., wanliker@a...
> >> |Moderator: jmelson@a... timg@k... [Moderator]
> >> |URL to this page: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> >> |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/
> >
> >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 as
a sister site to the CCED group, as many of the same memembers are
there, for OT subjects, that are not allowed on the CCED list.
> >
> >
> >
> >Post messages: CAD_CAM_EDM_DRO@y...
> >Subscribe: CAD_CAM_EDM_DRO-subscribe@y...
> >Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@y...
> >List owner: CAD_CAM_EDM_DRO-owner@y..., wanliker@a...
> >Moderator: jmelson@a... timg@k... [Moderator]
> >URL to this page: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> >bill,
> >List Mom
> >List Owner
> >
> >
> >
> >Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> >
> >
> >
>
> --
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