Re: [CAD_CAM_EDM_DRO] Power supply questions

Is the current rating on those motors continuous or peak ?

2amps x 5.75 in lb/amp x 16 oz/lb = 184 oz in, which isn't very much
torque if that is a peak value.

A 4 TPI ball screw has about 25 lbs of force for every in lb or torque.

2 Amps x 5.75 x 25 = 288 pounds force.

Kim

On Tue, 2003-08-05 at 14:36, camerashy44 wrote:
> I am starting to get some of the pieces of my mill conversion jigsaw
> puzzle together.
> Motors; Reliance Electric DC Servo motor, Model 0660-04-076, Back EMF
> Constant, ke = 68 V/kRPM, Torque Constant, kt = 5.75 lb-In/Amp , 250
> line encoder US Digital, Nominal Speed Rating: 1750 RPM, Nominal
> Voltage Rating: 120 Volts, 2 Amps
> Ball screws and
> nuts: Nook 1" x .250 lead
> Direct connection using Helical connectors
>
> Gecko 320 drives
>
> Sound Logic Breakout board for Mach 2 (when
> ready)
> I want to run the Geckos at about 70 volts +/- which will give me
> about 1000 rpm at the motor.
> I am now working on putting together
> the needed pieces for the power supply. I will be using a Plitron dual
> 115/230, 50/60hz, 1000va/50volt toroidal transformer that gives 10
> amps per side. This transformer will give me my 70 volts DC. I know I
> will need a capacitor and a bridge rectifier. How do you size these?
> Sources? I also have been told that I will need a zener diode of
> either 82/90 volts? 5amp fast blow fuses on each of the geckos. Are
> there any other bits and pieces that I need? Is there an electrical
> layout and wiring drawing anywhere that will show me how to put this
> all together? Should the power supply be in it's own enclosure or can
> it be incorporated into an enclosure with the breakout board and the
> Geckos? Although I am learning a bit about all this as I go, I still
> need the help of the experts that make this list so valuable. Are
> there any other suggestions/comments to what I am proposing? Thanks
> again for all your previous help. I am sure I will have many more
> questions before I get this all put together and running.
> Wayne Parks
>
>
>
> 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
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
--
Kim Lux <lux@...>