Re: Getting Started with Servo CNC

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
>
>
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