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Re: [Fot] OT Milling machine

To: James McAndrew <jdment@suddenlink.net>
Subject: Re: [Fot] OT Milling machine
From: greg <gtlund@cyberspeedway.net>
Date: Thu, 01 May 2008 13:58:23 -0700
James,
      The only vise to use if you have any choice is a Kurt. Everything 
else I have seen or used will move the work when you clamp.
      If you get a Bridgeport or similar 3 phase machine, the easiest 
way to convert single pahse to 3 phase is a variable frequency drive 
(VFD, inverter for those ebay searches). They all output 3 phase, just 
make sure to get a 220-240 volt unit. They will all take a sigle phase 
input even if they don't admit to it. If they have no single phase 
rating just  oversize it by about 50% - if you need 2 hp buy at least a 
3hp. Make sure you can get documentation for whatever you buy so you 
know how to wire it and set the limits for speed, accel, decel, & remote 
variable speed.
    VFDs work far better than the cheap 3 phase converters which really 
need an idler motor to smooth them out. If you have the time and spare 
parts you can make a converter with some capacitors and a 3 phase motor 
but it is  big, noisy, and needs to be tuned to the load. There are many 
plans floating around the net for these.

Greg Lund

James McAndrew wrote:
> I need advice from the incredible fund of knowledge of the FOT. 
> 
>  
> 
> I'm looking into buying a small milling machine (to make small prototype
> Triumph parts- okay now I'm back on topic).
> 
>  
> 
> I don't need a Bridgeport.
> 
>  
> 
> I have 220v single phase in my garage.
> 
>  
> 
> What should I get?  Jet? Grizzly? Do I need digital readout? Power feed?
> 
>  
> 
> Thanks
> 
> Jim McAndrew
> 
> Tyler, Texas
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