Re: [CAD_CAM_EDM_DRO] Re: RF-31

Hi Peter,

I think there are TWO holes (at the handle end) holding the current
bushing/bearing for the Acme screws. I haven't had a good look
underneath, to see what the other end is doing.

Alan KM6VV

cadcamcenter@... wrote:

>
> Thanks Alan,
>
> I had only a cursory look at the RF-31, and was hoping that there
> will be some predrilled and tapped holes for me to attach the motor
> mount or the plate (indirect drive), but it seem that I am out of
> luck. Does this mean that I have to find ways to drill and tap on
> site? This is not something I relish to do. How did they do the
> retrofit with the RF45 I wonder.
>
> Peter
>
> --- In CAD_CAM_EDM_DRO@y..., Alan Marconett KM6VV <KM6VV@a...> wrote:
> > Hi Peter,
> >
> > Here's the posting, under mill_drill files, mill stand, RF31MILL. I
> > believe others on this list or that have made mounts for the RF-45
> and
> > RF-31 mills, I don't think it's too big a problem.
> >
> > http://groups.yahoo.com/group/mill_drill/files/Mill%
> 20Stand/RF31mill.jpg
> >
> > Sorry for the big file!
> >
> > Someone surly will be willing to make the mounts. But if you have a
> > mill, it would be a reasonable project to make them! Of course, I
> > haven't tried it yet for this size a mill! I invasion a rectangular
> > plate of aluminum perhaps 0.5" thick, and wide enough for the #34
> > mounts. I intend to use 3:1 pulleys, and hang the motor on the
> other
> > side of the plate to the pulleys. I haven't looked at it them, but
> if
> > one keeps the acme lead screw (for a while, anyway), then the same
> > bearing setup would be done on the motor mounting plate. The
> resulting
> > .625" (?) shaft from the lead screw will protrude far enough for a
> > pulley. The stock pulleys will have to be bored and reamed to fit
> on
> > the lead screw, an stepper motor shafts. Better to get ballscrews
> right
> > away, but as mentioned, I might try with the Acme lead screws
> first. A
> > new ball screw will also require a mounting for the ball screw nut.
> >
> > Perhaps someone has plans for these mounts already!
> >
> > Hope this answered some of your questions.
> >
> > Alan KM6VV
> >
> > Peter Chen wrote:
> > >
> > > From: Alan Marconett KM6VV <KM6VV@a...>:I plan to
> > > try some old NEMA
> > > #34 S/S 300 oz/in motors on my new RF-31 mill, with
> > > 3:1 drives, even
> > > though their not really big enough! I will put on
> > > bigger steppers when
> > > I can afford them! For now, I'll even leave the Acme
> > > lead screws!"
> > >
> > > Hi Alan,
> > >
> > > Do you have any photo of your RF-31 posted anywhere on
> > > the web?
> > > Is there any possibility of making a motor mount for
> > > the RF-31?
> > > Perhaps some may want to make motor mounts for the
> > > RF-31 for sale?
> > > If one use indirect drive, how can one mount the motor
> > > to the table/slide
> > > and how would one take out the hand wheels to replace
> > > with toothed wheels?
> > >
> > > Hope this is not asking too much.
> > >
> > > Peter