Re: stepper wiring and AC stepper

Hi Tim,
Well said! One man's junk is an other man's gold! It
really burns me when people are told those motors are junk or
they are old. I see alot of people on the net that are creating
products with these so called junk motors. I rebuilt a Bridgeport
Boss 5 for a friend. I have three homemade CNC machines that use
Dremels as spindel motors. I have access to a jigbore machine
that can machine car motors. Like you said Tim, there are many
levels to this field. Why bother retrofitting fitting a milling
machine when you can buy a newer machine? The answer is cost.
Everybody has different income and priorities. I like the crowd
who is trying to learn CNC from the ground up. I know a guy who
bought a $40,000 milling machine with $2000 worth of software
just to show up my friend. My friend makes racing starters with
his machine. The other guy keeps cutting circles and checking
them! The guy is a real bone head, he has no drawing or computer
skills, just a $40,000 hole cutter. So my point is this, answer
a question, don't tell someone he bought junk! Junk is a relative
term. My hat is off to the tinkers, they have inspired my to design
build and write about building a CNC machine.


Off my soapbox

John

--- In CAD_CAM_EDM_DRO@y..., Tim Goldstein <timg@k...> wrote:
> OK, time to step in and ask for everyone to take a deep breath on
this.
>
> There has been much voluble input provided on this question. There
has also
> been a lot of valuable personal opinions provided. We all need to
realize
> that we have diverse experiences , desires, and resources. For some
of us
> the thought of modifying an AC synchronous motor to make it a high
> inductance stepper is a great money saver and we are willing to
accept the
> resulting performance. For others of us we only want to use the
most optimum
> solution and would rather spend more to know we have that. Both are
valid
> points of view.
>
> Mariss has pointed out that based upon his professional experience
you will
> need a very high voltage to drive a converted motor in an optimal
manner.
> John and Art have pointed out that you can make them work at a much
lower
> voltage. Both are right.
>
> Let's respect each others opinions and use the input to make an
informed
> decision for our own particular circumstances.
>
> Tim
> [Denver, CO]
>
>
> > I apologise if my answer went beyond a narrow one. I only meant
to
> > point out the consequences of the effort to modify the motor.
Also I
> > make a real effort not to co-mingle my business with the messages
I
> > post. I'm sorry if the perception is otherwise.
> >
> > Mariss
> >
> > --- In CAD_CAM_EDM_DRO@y..., kleinbauer@j... wrote:
> > > A person asks about some Slo Syn stepper motors. An
other
> > > person says they are AC motors. They are clearly steppers! I
> > mention
> > > you can open up the AC motors and make them steppers. Now we
are
> > > picking on how slow they would be. Has anyone helped the guy
trying
> > > to wire the steppers? How many angels can dance on the head of
a
> > > pin? I guess we should all use EMC and Gecko drives!
> > >
> > > John
> > FAQ: http://www.ktmarketing.com/faq.html