Hi David,
Excellent point - I missed the 575v issue, I didn't check this. I have a small (0.5HP) VFD that takes 120v and runs a 220v motor, but I do not know if units are available for 220/575.
Of course, one can get a "new" motor - often at a great price at the local "junk yard" or on eBay - but watch the shipping chanrges.
Kind regards,
DBN
--- On Thu, 9/9/10, David Frantz <websterindustro@mac.com> wrote:
From: David Frantz <websterindustro@mac.com>
Subject: Re: [gingery_machines] Repowering lathe
To: "gingery_machines@yahoogroups.com" <gingery_machines@yahoogroups.com>
Cc: "gingery_machines@yahoogroups.com" <gingery_machines@yahoogroups.com>
Date: Thursday, September 9, 2010, 9:04 AM
You have already gotten this suggestion but LOOK INTO a VFD. 3HP is at the point where they become expensive, especially units suitable for single phase use. However variable speed can be nice to have.
The problem in your case though is that 575 volt motor. You need to verify that it can be wired up for 220. It is not a given that low voltage operation is supported.
If not you still will likely be better off buying a three phase motor and VFD. Look online for decent pricing.
David A Frantz
websterindustro@mac.com
Sent from my iPhone.
On Sep 9, 2010, at 1:50 AM, clff_swan <cwswan@wildroseinternet.ca> wrote:
> I have been lurking for several years and have cast the gingery bed in aluminium but then stalled. Have cast a few other objects as I
> needed them but have always wanted to play with a lathe since taking a metal working class at school back in the 1970's.
> I just lucked out and ended up with a Harrison 300 metal lathe which has a 3-phase 575volt 3Hp motor driving the spindle. I need to convert to a single phase motor. A 3hp motor with the same frame size will cost about $600.00 but I found a 2hp motor for about half that. The question is-Will a 2 Hp motor give an adequate level of performance for home/ hobby use considering that the lathe has a spindle gear range of about 48rpm up to 2400rpm? The lathe is a 61/2inch (13 inch) by 24 inch size.
> I have absolutely no experience running a lathe but I suspect the smaller motor will work but will limit the size of cut I can take. Is that correct?
> Thanks for any input.
> Cliff Swan
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