Re: I need more power

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "turbulatordude

Dave,

I don't know who makes them over here, but there are purpose made
stepper gear boxes available in ratios from 5:1 to 500:1. Saw them
when I was investigating things in the UK a couple of years back.

Bernard
<davemucha@j...>" <davemucha@j...> wrote:

> um... so if I said a 3/64th drill would you laugh ?
>
> 6,000 rpm as the spindle is fitted with standard electric motor
> bearings and none of this is balanced.
>
> I am also drilling a 5/16 drills.
>
> It's winter overhaul time and I wanted to upgrade whatever I could
> before I get it back up and running again. I'm laying out the
> upgrade to high speed for my next major overhaul, and if you
> remember, the quill on one of the heads is loose so I am installing

a

> bronze bushing in that one now and the other head in the fall.
>
> currently using NEMA34, single stack, surplus so probably no more
> than 150oz-in.
>
> I can easily fit a triple stack in the same space and have a
> humongous power supply so the only real limits are the 7amps of the

4

> Gecko's
>
> Dave
>
>
>
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "j.guenther"
> <j.guenther@v...> wrote:
> > It would seem to me that a 3:1 reduction for any decent stepper
> motor should
> > give you all the power you would need. What is the torque rating
> of the
> > motor you are using? My guess would be that with a 400 to 600
> oz/in motor
> > you would have plenty of power, that is 1200 to 1800 oz/in given
> the belt
> > reduction. What are you drilling with this thing anyway? What
> size drill
> > bits are you using? An Oriental Motors PK299-01A is rated at 611
> oz/in or
> > you could move up to a PK2913-01A which is rated at 916 oz/in

which

> would
> > give you 1833 or 2748 oz/in respectfully. I would think that
> either of
> > these would handle a drill press quite nicely.
> >
> > John Guenther
> > 'Ye Olde Pen Maker'
> > Sterling, Virginia
> >
> > > -----Original Message-----
> > > From: turbulatordude <davemucha@j...> [mailto:davemucha@j...]
> > > Sent: Friday, February 07, 2003 13:31 PM
> > > To: CAD_CAM_EDM_DRO@yahoogroups.com
> > > Subject: [CAD_CAM_EDM_DRO] Re: I need more power
> > >
> > >
> > > Hi MArv,
> > >
> > > I just pulled the thing apart to get teh numbers for new

bearings.

> > >
> > > check the photos section - daves stuff - drill1 and drill2 and
> drill3
> > > the Large L is what it would look like if I put on a pretty big
> > > timing pulley.
> > >
> > > since the unit is just loosly assembled for the picutres you
> should
> > > get the idea, just please don't aske mt to tightent the belt !
> > >
> > > It seems the large L gear will fit : ) but I might need a little
> > > clearance for the parts !
> > >
> > > Dave
> > >
> > >
> > >
> > > --- In CAD_CAM_EDM_DRO@yahoogroups.com, Marv Frankel
> <dcdziner@p...>
> > > wrote:
> > > > Dave,
> > > > It might be easier to visualize, if you could post a
> > > picture or two,
> > > > of the present installation, or attach them to a direct email
> to me.
> > > >
> > > > Marv Frankel
> > > > Los Angeles
> > > > dcdziner@p...
> > > >
> > > > ----- Original Message -----
> > > > From: <davemucha@j...>
> > > > To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> > > > Sent: Friday, February 07, 2003 7:57 AM
> > > > Subject: [CAD_CAM_EDM_DRO] I need more power
> > > >
> > > >
> > > > > Hi guys,
> > > > >
> > > > > I'v got a NEMA34 single stack on a drill press feed.
> > > > > the stepper has a 24 tooth XL drive gear and the drill have

a

> 72
> > > XL
> > > > > tooth driven gear.
> > > > >
> > > > > I'd like to increase power considderably.
> > > > >
> > > > > I am thinking that my most obvious choices are;
> > > > > get a bigger stepper,
> > > > > add a jackshaft and another timing belt set
> > > > > switch to a gear motor
> > > > > add a worm gear.
> > > > > change down feed to a ball screw or something.
> > > > >
> > > > > I've been looking at gear heads for Oriental motors, but

they

> seem
> > > > > like they are for AC motors, not steppers.
> > > > >
> > > > > I am limited on space, could use a NEMA34 triple stack. I

am

> > > > > wondering if I would then need to switch out from the XL
> belts?
> > > > > (my 50 tooth L gear is HUGE ! so that is not real

attractive)

> > > > >
> > > > > any suggestions ?
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
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> CCED list.
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