Re: Getting Started with Servo CNC

Wow! thanks Gary, I'm just as excited as you are about your
conversion. I have sold about one dozen plans but you are the only
one who has communitcated back to me about their progress.

Thanks again

Jeff Davis
http://www.homecnc.info

--- In CAD_CAM_EDM_DRO@y..., "mgdcnc" <rc_parts_guy@h...> wrote:
> In response to the person looking at Jeffs page for the motors. He
> does offer them for sale. The are listed along with his plans.
> And all I can say about them so far is the are GREAT. I bought
> Jeff's plans and his motors. His plans are terrific and the motors
> work real nice. They look small but they run so strong its hard to
> believe.
> As for Jeff's plans I recommend them to anyone wanting to convert
a
> drill/mill. I have used them and I am very close to finnishing my
> conversion. I just need to install the Z parts and its done.
> I have the X and Y working and have cut a few of the Z parts using
> the mill.
> Jeff is a very helpful person and came up with a great idea.
>
> Gary
>
>
> --- In CAD_CAM_EDM_DRO@y..., "Dan Mauch" <dmauch@s...> wrote:
> > If those are standard C23 Lesson motors with a 1" D raised face
> then I
> > have a motor mount already designed for the X-Z. The Y axis motor
> mount
> > for the shoptask is different. I will probably machine a few next
> week
> > for some of my customers.
> > If those are 3/8D motor shafts then you would/should use a
16XL037
> > timing belt pulley. While I would have preferred a 5/16 or 1/4" D
> shaft
> > so you could use the 14XL037 pulley. The rational is that the max
> size
> > you can bore a 14XL037 is 3/8" but the hub is only 9/16" thus the
> wall
> > of the hub will be pretty thin i.e. 3/32 wall. The 16XL037 has a
> 11/16 D
> > hub.
> > If you need pulleys call 1-800-426-0985 they used to be called
> BESCO but
> > they changed their name.
> > Here was the link to Jeff's servo motors
> > http://www.homecnc.info/plans.htm
> > Dan
> >
> >
> > -----Original Message-----
> > From: Erik Reikes [mailto:ereikes@r...]
> > Sent: Tuesday, September 10, 2002 2:56 PM
> > To: CAD_CAM_EDM_DRO@y...
> > Subject: [CAD_CAM_EDM_DRO] Re: Getting Started with Servo CNC
> >
> > Hey Dan,
> > Thanks for the reply. I sent you a seperate private email for
> the
> > pictures, but figured I'd continue here with the on-topic stuff.
> >
> >
> >
> > > 3. The shoptask X axis as I recall comes with a 42 tooth driven
> > pulley.
> > > The shaft on your motor is 5/8 D so you will probably need a
> fairly
> > > large diameter pulley on the motor losing some efficiencies.
> >
> > I've been contemplating either boring out the existing pulleys
> (hub
> > would be marginal size for set screws), or ordering some bigger
> ones
> > for a 1-1 ratio.
> >
> > A better
> > > solution would to have been to use the smaller motors that are
> C23
> > and a
> > > have a .250 shaft from Jeff Davis on this list. I have used
> similar
> > > motors and gotten over 135 IPM with a 3/1 ratio.
> >
> > Now this is sounding like a better solution. I'll have to check
> into
> > those motors. The further I was getting into these large servos
> the
> > more I was feeling like I was trying to make a silk purse and all
> of
> > that. I got a decent deal on the large servos and I may someday
> use
> > them for something else. I'm married to servos at this point
due
> to
> > my purchase of the gecko drivers (plus I think its a lot cooler
> way
> > to go).
> >
> > I looked over Jeff's web page, but didn't see them for sale. I
> have
> > dropped him an email and in the mean time I'm looking for motors
> on
> > ebay.
> >
> > I also just noticed that you have slightly smaller servos on your
> > page for $160. I think they still have the problem of the larger
> > diameter shaft. I believe that a nema 34 stepper has a 3/8"
shaft
> > and the shoptask has a similar sized hole.
> >
> > > Master 5 is set up to run a mill/gantry system but by swapping
> the
> > > motors cables for X and Z you would have a correct
configuration
> > then
> > > all you need is the CadCam program that will give you the
> correct G
> > code
> > > files for a lathe.
> >
> > Here's where I know just enough to get myself into trouble.
Since
> my
> > lathe x and z axis are the same as my mill y and x axis
> > (respectively) I'm thinking I'll either just have to be careful
in
> my
> > cad program to arrange things to work properly, or unplug and
> replug
> > the cables for the different setups.
> >
> > I suppose I'll figure out what is best with experience.
> >
> > Thanks for all your help.
> >
> > -Erik Reikes
> >
> >
> > Addresses:
> > FAQ: http://www.ktmarketing.com/faq.html
> > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> >
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