Re: [CAD_CAM_EDM_DRO] What kind of motor should I use?

In a message dated 03-Feb-02 15:42:15 Central Standard Time,
datac@... (Chris) writes:

> You had a LOUD Perske ??<< HORRIBLY-so! (a BIG 'un: 3.5 HP)

> The two (note correct use of word [!!!] ) I stood behind were very quiet. <<
> There are two "groups" of Perske spindle-
> motors, one with an external fan (sirens!) and TENV kind. The ones YOU

stood behind: Fans?

As you pointed out, they > get expensive because the Inverter costs so

> much more than the spindle.
> We could use a few newcomers *to the affordable spindle field *too! <<
> Scho' nuff! Listen-UP, 'Merikun mfgrs!!!

> Some of the German stuff does not seem to have any resellers over here.<<

Yeah, Perske has a reseller in NJ. Been 15 years, so I'd have to look in
file to see who/where.

I wonder what kind of $$$$ they can buy stuff like that for over there?<<
Even HIGHER, I think, due to the German VAT and Lohnsteuer. >>
Maybe one of the European Group
members > could set up someone in the states *to market spindles at a lesser

> rate.....<< Lossa luck!

Did I read somewhere in this group that "regular 3-phase tool-motors" can be
used at higher frequencies [with care] to produce high-RPM spindles? Seems
dangerous and dubious. Can an expert "in here" on that comment? The ONLY
experience I have with HF motors is with a 95 watt "aircraft instrument
motor" running on 115 VAC 400 Hz. (which I get from a self-designed/cobbled
stationary inverter that "simulates" sine-wave 400 Hz/115 VAC). That is for
a PCB drill, and it works just fine (12,000 RPM, not 24,000!!!) But, took
some fancy machining to install a collet and larger ABEC-7 spindle-bearing in
place of original "plain shaft", etc.)

P.S: The Perske stuff DID seem like well-did hardware, but even still, the
pricing was what I'd guess would be half- to as-much-again as any American
mfgr. would want for "same thing". Comments? American HF spindle makers?

Sincere ignernce, Jan Rowland, old troll




[Non-text portions of this message have been removed]