Re: [CAD_CAM_EDM_DRO] Re: VFD Selection

>
> I do think I have a design for a belt driven angular contact or tapered
> roller bearing spindle that could be run from a single phase 120vac motor
> at fixed speed (least costly), a dc motor/servo amp, or a phase control
> (voltage)
> dc motor over a limited rpm. It would have torque due to the gearing down.
> I could try and find it for you if you have the capability to do precision
> (+/-0.0002") machining with your tools.
>
> Could you tell me more about what you want to cut and how fast? Sounds
> like we are getting more into Milling machine territory. A steel cutting
> gantry type machine is usually not in the hobby relm.
>
> Les
>
>
>
> Leslie M.Watts
> L M Watts Furniture
> Tiger Georgia USA
> (706) 212-0242
> http://www.lmwatts.com
> Engineering page:
> http://www.lmwatts.com/shop.html
> CNC surplus for sale:
> http://www.lmwatts.com/forsale.html
> CNC carved signs:
> http://www.lmwatts.com/signwp.html
>
>
>
>
> -----Original Message-----
> From: george_barr [mailto:george_barr@...]
> Sent: Tuesday, April 13, 2004 4:28 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] Re: VFD Selection
>
>
> Leslie,
> It appears that I cannot use a VFD or Variac to reduce my router to
> 1k rpm. What type of motor can I use with a VFD (input: 120VAC,
> output: 120VAC or DC) without getting too expensive or without using
> servo drives? Is there a specific phase specification. Does the
> motor have to be AC or can it be DC? What I am planning to do is cut
> mild steel (which requires low rpm speed)?
>
> Thanks,
>
>
>
>
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