RE: [CAD_CAM_EDM_DRO] Re: 60oz. stepper motors!

I would suggest at least 3:1 reduction for these motors on the HF mini mill,
that cast iron table is much heavier than the aluminum table on a Sherline.

No, I did not purchase the HobbyCNC kit from him, just the motors. They
were my first CNC purchase and I have learned a lot since then (3 years
ago). His prices are good and his kits are a good place to start but I
would recommend a Camtronics 2amp driver and stronger motors for the HF mini
mill. You might be able to use the 60 oz/in motors with at least 3:1
reduction which would be about equal to 180 ox/in motors. If you don't mind
slower rapids you will most likely be fine. I limit my Sherline to 12 IPM
on rapids and reqularly cut 1018 steel with 3/8 and 1/2 inch end mills with
no problems. I am currently using 85 oz/in motors with bipolar chopper
drivers and a 39 volt power supply.

What software are you planning on using for a control program?

John Guenther
Sterling, Virginia

> -----Original Message-----
> From: jepps5 [mailto:bobby808@...]
> Sent: Monday, September 09, 2002 12:46 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] Re: 60oz. stepper motors!
>
>
> I will be running them on a Harbor Freight Mini-Mill. It sounds like
> you were able to cut steel. As far as rapid movements go, i will
> just have to take my time. You have purchased the HobbyCNC kit
> before? If so, is it easy to use and set up?
>
> Thanks
>
> --- In CAD_CAM_EDM_DRO@y..., "John Guenther" <j.guenther@v...> wrote:
> > I initially ran a set of these on my Sherline 5400, they were ok
> for cutting
> > but lacked power for rapid movements over 10 IPM. What kind of
> machine are
> > you going to use them on?
> >
> > John
> >
> > > -----Original Message-----
> > > From: jepps5 [mailto:bobby808@e...]
> > > Sent: Monday, September 09, 2002 05:35
> > > To: CAD_CAM_EDM_DRO@y...
> > > Subject: [CAD_CAM_EDM_DRO] 60oz. stepper motors!
> > >
> > >
> > > Would 60oz. stepper motors be enough to mill stainless steel? I
> know
> > > that everybody has big motors here but I dont have that much
> money
> > > to spend. I was wondering if I could just use slow feed rates to
> cut
> > > stainless steel with these stepper motors.
> > >
> > > The reason why i am asking is because HobbyCNC
> > > (http://www.hobbycnc.com/package.htm) has a complete CNC package
> for
> > > cheap.
> > >
> > > Thanks
> > >
> > >
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> 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 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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