RE: [CAD_CAM_EDM_DRO] Re: 187 oz-in steppers for 34.95?

Both PK268M-02A and TM02MTR4572 are the same motors, except PK268M-02A is
listed as 191 oz.in. (1.35 Nm) @$99 in Oriental Motors web site.
This is a good motor, I used it. I can recommend it for a desktop mill
application or similar only, as the torque will drop dramatically after 60
rpm speed. If you can drive them half-step @1-1.5kHz, a 1/8" (3.175 mm)
lead on the screw will give you 0.00016" (0.004mm) step accuracy. So you
don't really need micro stepping drivers like 1/4, 1/8 etc. Only
halfstepping will give you a super accuracy. Great price for a 8 ipm axis
motion.

A couple of words for the power: I feed them @42VDC at 2.15A which I believe
they give their best performance. So your power supply and driver boards
should be capable of doing so.

Memo

> -----Original Message-----
> From: alex [mailto:telecomt@...]
> Sent: Sunday, March 16, 2003 10:03 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] Re: 187 oz-in steppers for 34.95?
>
>
> Found it!
> Will buy some.
>
> Alex
> ----- Original Message -----
> From: kevin53901 <kevinh@...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Saturday, March 15, 2003 10:12 PM
> Subject: [CAD_CAM_EDM_DRO] Re: 187 oz-in steppers for 34.95?
>
>
> >
> > Try TM02MTR4572 in the search field at www.herbach.com.
> >
> >
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "alex" <telecomt@t...> wrote:
> > > Kewin,
> > > what is the part#?
> > > Alex
> > > ----- Original Message -----
> > > From: kevin53901 <kevinh@w...>
> > > To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> > > Sent: Friday, March 14, 2003 9:14 PM
> > > Subject: [CAD_CAM_EDM_DRO] 187 oz-in steppers for 34.95?
> > >
> > >
> > > > The reason I ask about these 187 oz-in motors is that I found them
> > > > here www.herbach.com for only 34.95 each!!!! I guess I'll order 3
> > > > seeing as that they should work just fine. Very cheap price or am
> > I
> > > > missing something here? Thanks all for the info.
> > > >
> > > > Kevin
> > > >
> > > > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "kevin53901" <kevinh@w...>
> > > > wrote:
> > > > > I am a newcomer to the home-built CNC hobby. I am currently in
> > the
> > > > > process of planning the build-up of my CNC-ready Taig mill. I'm
> > > > still
> > > > > debating over controllers but leaning towards Xylotex. I'm on
> > the
> > > > > search for stepper motors and have found many different kinds.
> > I've
> > > > > read through the CNC for Hobbyists document and I'm stuck on the
> > > > part
> > > > > that covers the number of steps per rev. Am I only looking for
> > 200
> > > > > step motors or can I also use 400 step motors? From reading the
> > on
> > > > the
> > > > > Xylotex website I see that it can be configured for full, 1/2,
> > 1/4,
> > > > > and 1/8 step. Will this alllow me to use motors besides a 200
> > step?
> > > > > Will this mean higher resolution? I have found a motor (Vexta
> > > > > #PK268M-02A) Rated around 190 oz-in. 4.5 VDC, 2 Amps, 400
> > > > Steps/Rev,
> > > > > Step Angle 0.9°, 6 Wire Leads, 2.25 Ohms. Does this sound like a
> > > > > possible chioce to match up with this controller? Also, does
> > > > anybody
> > > > > have a source for a housing for the controller, power supply and
> > > > misc.?
> > > > >
> > > > > Thanks,
> > > > > Kevin