Re: I need more power

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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