Re: [CAD_CAM_EDM_DRO] Power Supply Basics - Question

John,

The current needs to be 2/3 not 1/3. You will need about 11 amps for 4
motors.

Bob Campbell
http://www.campbelldesigns.com
Breakout Boards
VisualMill 5.0 basic

----- Original Message -----
From: <jharnedy@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, December 18, 2003 8:21 AM
Subject: [CAD_CAM_EDM_DRO] Power Supply Basics - Question


>
> Hi list,
>
> Hooking up G201s to SanyoDenki 103 H 8221 - 5141
> Motor specs Vdc = 2.4, Phase current 4 amps
>
> Per Gecko white paper, 25 times voltage = 60 Vdc, hence divide by 1.414
=> 42 Vac
>
> Current is 1/3 per motor (4 wire, bipolar), so for 3 motors PS output
needs 4 amps
>
> If 4 axis, then 4 motors => 5.3amps
>
> Hope above logic is correct, if not please highlight errors!
>
> Have been looking around for 42Vac output, and best i can find is a 230Vac
transformer with 2 independent secondaries, both rated at 20 Vac @ 2.5 amps
( part no RS 805-300 ). Can i hook these up in series to get 40Vac @ 5 amps?
> If so, will there be any issues with using just 3 motors (the 4th may not
be connected up until i can get my head around how to design the fourth axis
economically!)
>
> TIA
> John
>
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
>
> Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...,
timg@...
> Moderator: pentam@... indigo_red@... [Moderators]
> URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>
> 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
>
>
>
> Yahoo! Groups Links
>
> To visit your group on the web, go to:
> http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/
>
> To unsubscribe from this group, send an email to:
> CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
>
> Your use of Yahoo! Groups is subject to:
> http://docs.yahoo.com/info/terms/
>