Re: new listmember

[Clarke Williams <clarkewilliams-at-halcyon.com>]

Tim,

Thanks! more below

At 01:39 PM 7/2/02 -0400, you wrote:
>
>Welcome to the list. I personally have no experience with the Rong-Fu, but
>know that there are a number of list members that have them and like them.
>>From your background it sounds as if the only area you may have to stretch a
>little is electrical. Other than that you sound better equipped than most.

I was an electronics tech in the US Navy and my Dad was a EE.  Not much
power electrical background but analog and digital circuits I'm comfortable
with.  Have even made a few thru-hole circuit boards although it has been
awhile.

I am interested in hearing from anyone that already has a Rong-Fu --
especially the rectangular column RF-45.

>
>Don't be afraid of getting a 3 phase machine. You can just connect them to a
>VFD that is drawing power from a single phase 220 line and they will run
>just as if you had 3 phase in the shop. Most VFD's do need to be downrated
>50% for this type of use so if you have a 2 hp machine you will use a 4 or 5
>hp VFD. They do not change voltage though so you need to be sure the machine
>can run on 3 phase at the voltage of your single phase.

Any comments on differences between rotary and static phase convertors?
Any rule-of-thumb or equations to predict power losses in the phase convertor?

>
>I started with a Sherline with a Camtronics controller then moved up to a
>Shoptask with the same controller. I then upgraded to servos using Gecko
>G320 drives and now have a Bridgeport Series II using the Gecko servos drive
>and EMC. For heavy work there is no comparison between the small machines
>and a series II.

I have no idea whether to look at stepper motors or servos or the various
pro-cons of each, controller requirements, etc.  I've just started this effort.

>
>Good luck and don't be shy about posting to the group.
>
>Tim
>[Denver, CO]
>http://www.KTMarketing.com/CNC.html

Thanks again!

clarke



Clarke Williams 
    * Voice   +01.541.266.0300 
    * Email   <clarkewilliams-at-halcyon.com>