Re: [CAD_CAM_EDM_DRO] 3 Phase/VFD question

Thank you for the help, one thing I forgot to mention
is that the mill has adjustable variable speed pullies
using a stepper motor. So will making an adapter for a
1 phase 230v motor?
Ron

--- Bill Vance <ccq@...> wrote:

> Howdy Ron;
>
> On Wed Jun 2 06:34:54 2004 R Petersen wrote:
>
> >I have a SHIZUOKA NC mill (converting it to CNC)
> and
> >don't know what the motor rating is. The nameplate
> is
> >on there. I'll have to recheck. Question is I'd
> like
> >to get 1 VFD for 2 different machines, is that
> >possible?
>
> Yesm bearing in mind that the wiring diagrams in
> some manuals, allready looks
> like an explosion in a spaghetti factory. :-)
>
> > How do I properly size the VFD for the Mill?
>
> Figure out what speed and horsepower you need, what
> gear/pulley reduction you
> may want, and then start looking at motor/VFD specs.
> look at the previous specs
> again, with a view towards what tradeoffs you might
> want to make. Look at them
> that way several times, until you get something that
> looks good, and then start
> looking at cooling and lubrication factors. Will
> your bearings stand the heat,
> torque. speed factors, and so on.
>
> >Where in the Rutland catalog can I find this and
> what
> >else is the VFD called?
>
> The motors are on page 480. Drives for short.
>
> >Would it be better to make a motor mounting plate
> and
> >install a 230 1 phase motor?
>
> No. Unless you want something that works at one and
> only one speed.
>
> Bill
>
>
> >Thank You,
> >Ron Petersen
> >
> >
> >--- Bill Vance <ccq@...> wrote:
> >> Hi Jan;
> >>
> >> Not sure what I did with that catalog at the
> moment,
> >> but I do have another.
> >> According to the Airgas/Rutland Tool catalog,
> there
> >> are several models, and
> >> the RPMs listed at 60 Hz input are, 1710, 1725,
> >> 1740, and 1750. and are rated
> >> at 1 to 3 horsepower.
>
> >>
> >>
>
> >>
> >> I'm looking at the two one horse models, and the
> >> first is a TEFC-NEMA 56,
> >> weighing in at 31 lbs., and the other is a
> TEFC-IEC
> >> B3 foot mount D80, weighing
> >> about 13 lbs. Those are shipping weights. They
> are
> >> rated at 1725, and 1710
> >> RPMs, respectively. Sounds like the second one
> >> might be better for the Z axis
> >> spindle on a vertical mill, whereas either should
> >> workfor a lathe spindle, yes?
> >>
> >> Bill
> >>
> >>
> >> On Tue Jun 1 16:31:17 2004 JanRwl@... wrote:
> >>
> >> >In a message dated 6/1/2004 1:31:00 PM Central
> >> Standard Time,
> >> >ccq@... writes:
> >> >motor that was rated, if I remember correctly,
> at
> >> 1792 RPM. A VFD I've
> >> >looked at has a frequency rating of .5 to 360
> Hz.
> >> If combined, what would be the
> >> >output range of RPMs
> >> >from the motor? Do I divide 1792 by 60, and
> then
> >> multiply that by 360, or
> >> >what?
> >> >
> >> >Bill: I may be wrong, but I THINK this strange
> >> number, 1792, is the result
> >> >of taking the 1800 RPM "sync. speed" and
> deducting
> >> some (theoretical quantity?)
> >> >value "speed derating". You absolutely sure you
> >> have the number exactly
> >> >correct? Because 1782 = 99% of 1800 RPM. If
> you
> >> run a standard "1750 RPM" motor
> >> >on 60 Hz. with no load, or VERY little load, it
> >> will run at exactly 1800 RPM.
> >> >Same for a "3450 RPM" motor: 3600 RPM. ANYway,
> >> you would get the correct
> >> >result with your algorithm, but the CORRECT
> >> proceedure would be to divide the
> >> >VFD's output-f by 60 (or 50, if in almost
> anywhere
> >> in the rest of the world),
> >> >and then multiply the 1792 or 1750 or 3450 or
> >> whatever "name-plate RPM" by the
> >> >result. (I understand that 360 Hz. is generally
> >> the highest f you can get "in
> >> >the U.S." (60 Hz. mains), but in Europe with 50
> Hz,
> >> you can get up to 400 Hz.
> >> >Has something to do with the "explosion speed"
> of
> >> motors or some-such
> >> >old-wives' tale spec. I dealt with a rotary
> >> f-converter I installed in England,
> >> >once, and I PROMISE, though "all went well, and
> >> worked, and I was paid", I don't
> >> >EVER wanna hafta mess with such again! Whew!
> TOO
> >> Much iron and copper for ME!
> >> > Jan Rowland
> >> >
> >> >
> >> >[Non-text portions of this message have been
> >> removed]
> >> >
> >> >
> >> >
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> >> RKBA! * Blessings on thee, oh
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>********************************************************************************
> >>
> >> An _EFFECTIVE_ | Insured by | All Matter is
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> goto:
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> >>
> >> http://groups.yahoo.com/group/jobshophomeshop I
> >> consider this to be a sister site to the CCED
> group,
> >> as many of the same members are there, for OT
> >> subjects, that are not allowed on the CCED list.
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> >> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC
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> >
> >
> >
> >
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> >
> >http://groups.yahoo.com/group/jobshophomeshop I
> consider this to be a sister site to the CCED group,
> as many of the same members are there, for OT
> subjects, that are not allowed on the CCED list.
> >
> >NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC
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> --
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********************************************************************************

> *
> *
> RKBA! * Blessings on thee, oh
> Israel!!! * 4-19!
> *
> *
>

********************************************************************************

>
> An _EFFECTIVE_ | Insured by | All Matter is
> vibration. | Let he who hath no
> weapon in every | by Colt; | --Max Planck
> | weapon, sell his
> hand = Freedom | Dial | In the beginning was
> the | garment, and buy a
> on every side!! | 1-911-A1 | Word. --The Holy
> Bible | sword. --Jesus Christ
>
>

********************************************************************************

>
> Constitutional Government is dead! LONG LIVE
> THE CONSTITUTION!!!!!!
>
>

********************************************************************************

>
>
> Addresses:
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> URL to this group:
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>
> OFF Topic POSTS: General Machining
> If you wish to post on unlimited OT subjects goto:
> aol://5863:126/rec.crafts.metalworking or go thru
> Google.com to reach it if you have trouble.
> http://www.metalworking.com/news_servers.html
>
> http://groups.yahoo.com/group/jobshophomeshop I
> consider this to be a sister site to the CCED group,
> as many of the same members are there, for OT
> subjects, that are not allowed on the CCED list.
>
> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC
> DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT
> ACCEPT THIS.....NO EXCEPTIONS........
> bill
> List Mom
> List Owner
>
>
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>
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>
>

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