Servo as a Sherline spindle motor ?

Gentleman, Please no personal attacks on the group. We have been doing good
for a long time without them, I see no need to go backwards.
bill
LIST MOM



In a message dated 12/21/2008 9:59:29 A.M. Mountain Standard Time,
philip.burman@... writes:




If you don't understand the difference you are in for a lot of
confusion, which seems to be where you are at.

Best to listen and keep your mouth shut. That way it's not so easy to
put your foot in it.

Phil

--- In _CAD_CAM_EDM_CAD_CAM_EDM_<WBRCAD_
(mailto:CAD_CAM_EDM_DRO@yahoogroups.com) , "Yahoo" <yahoo@...> wrote:

>
> If you say so. Anybody for a little game of nit-picking?
> --
> Phil Mattison
>
> ----- Original Message -----
> From: Andy Wander <awander@...>
> To: <_CAD_CAM_EDM_CAD_CAM_EDM_<WBRCAD_

(mailto:CAD_CAM_EDM_DRO@yahoogroups.com) >

> Sent: Thursday, December 18, 2008 8:36 PM
> Subject: RE: [CAD_CAM_EDM_ Subject: RE: [CAD_CAM_EDM_<WBR>D

motor ?

>
>
> > Phil:
> >
> > It's in-lb or in*lb, NOT in/lb.
> >
> > ____________ ____ ____ ___
> > Andy Wander
> >
> > -----Original Message-----
> > From: _CAD_CAM_EDM_CAD_CAM_EDM_<WBRCAD_

(mailto:CAD_CAM_EDM_DRO@yahoogroups.com)

> [mailto:_CAD_CAM_EDM_CAD_CAM_EDM_<WBRCAD_

(mailto:CAD_CAM_EDM_DRO@yahoogroups.com) ] On Behalf Of Yahoo

> > Sent: Thursday, December 18, 2008 7:01 PM
> > To: _CAD_CAM_EDM_CAD_CAM_EDM_<WBRCAD_

(mailto:CAD_CAM_EDM_DRO@yahoogroups.com)

> > Subject: [CAD_CAM_EDM_ Subject: [CAD_CAM_EDM_<WBR>DRO] Re: Servo as a
> >
> > Right. I meant to type in/lb. Stupid fingers! In any case it

shouldn't be

> > too hard to stall.
> > --
> > Phil Mattison
> >
> >
> > ----- Original Message -----
> > From: Dave Sage <davesage12@dav>
> > To: <_CAD_CAM_EDM_CAD_CAM_EDM_<WBRCAD_

(mailto:CAD_CAM_EDM_DRO@yahoogroups.com) >

> > Sent: Thursday, December 18, 2008 12:09 PM
> > Subject: [CAD_CAM_EDM_ Subject: [CAD_CAM_EDM_<WBR>DRO] Re: Ser
> >
> >
> > > Correct me if I'm wrong but:
> > > 16 oz in a pound, 12 inches in a foot
> > >
> > > 150 oz/inches equals:
> > > 150/16/12 = approx 0.8 ft/lbs.
> > >
> > > Sage
> > >
> > > --- In _CAD_CAM_EDM_CAD_CAM_EDM_<WBRCAD_

(mailto:CAD_CAM_EDM_DRO@yahoogroups.com) , "Yahoo" <yahoo@> wrote:

> > > >
> > > > 150 OzIn peak is about 9 ft/lb so you probably could stall it

if

> > > you had a
> > > > better grip. Lacking a dyno (doesn't everyone have one?)

maybe a

> > > reasonable
> > > > comparison would be to wear leather gloves and stall both

motors

> > > with your
> > > > hand to see how they compare. You probably want the servo to

be

> > > stronger
> > > > than the stock Sherline motor anyway to get the low-end

torque for

> > > > threading. Quite a bit stronger I should think.
> > > > --
> > > > Phil Mattison
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: Alan Rothenbush <alan@>
> > > > To: CAD CAM EDM DRO <_CAD_CAM_EDM_CAD_CAM_EDM_<WBRCAD_

(mailto:CAD_CAM_EDM_DRO@yahoogroups.com) >

> > > > Sent: Wednesday, December 17, 2008 9:06 PM
> > > > Subject: [CAD_CAM_EDM_ Subject: [CAD_CAM_EDM_<WBR>DRO] Servo as a
> > > >
> > > >
> > > > > Thanks to all who responded to my question about my 5mm

pulley

> > > bore. I
> > > > have some coming and I'll try to bore them out and cross my

fingers.

> > > > >
> > > > > That pulley is destined for the end of a double-stack NEMA17
> > > stepper that
> > > > will be used to drive the cross slide of a Sherline lathe

that I'm

> > > FINALLY
> > > > getting around to CNCing properly.
> > > > >
> > > > > One thing I'd like to try on the Sherline is CNC threading.
> > > > >
> > > > > I see two ways to do this.
> > > > >
> > > > > 1. Put a servo on the spindle and write a bit of custom

code; no

> > > real
> > > > problem, or
> > > > >
> > > > > 2. Put a nice fat motor on the spindle (so there's no

worries

> > > about it
> > > > slowing down) and use one of the "spindle sensor" options.
> > > > >
> > > > >
> > > > > Option 1 is certain to work AND I have all the bits at hand;
> > > spare gecko
> > > > G320, a choice of servo motors, and some L series pulleys.
> > > > >
> > > > > The one little fly in the ointment is that the choices for

servo

> > > motors
> > > > are
> > > > >
> > > > > . one that's SEEMS a wee bit small or
> > > > > . one that's WAY WAY WAY TOO BIG and would be wasted in this
> > > application.
> > > > >
> > > > >
> > > > > The smaller motor is an older EG&G Torque systems ME2610.

It is

> > > > physically pretty close to the same size as the stock

Sherline _AC_

> > > sewing
> > > > machine motor, if that means anything. (It's an old lathe).
> > > > >
> > > > > I can find no specs on the PRECISE motor, but I did find

some

> > > specs on a
> > > > similar motor from the same manufacturer (same dimensions,

similar

> > > part
> > > > number). That motor is rated at 29 OzIn continuous, 150 OzIn
> > > peak. This
> > > > does not seem like a whole lot of torque to me.
> > > > >
> > > > > On the other hand, I can't stall it with 36 volts driving

it by

> > > grabbing
> > > > the 1" pulley, so maybe 150 OzIn is more torque than it seems.
> > > > >
> > > > >
> > > > > Anyway, I'm looking for thoughts, opinions and experiences;

all

> > > comments
> > > > gratefully accepted.
> > > > >
> > > > >
> > > > >
> > > > > Alan
> > > >
>

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