×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

motor unknown

motor unknown

motor unknown

(OP)
Hi, I have to control a gearmotor which doesn't have any tag or spec.I know it's a run capacitor 220 volts.it has  five wires coming out of its terminal box. two yellows, two blacks, one red.I have to control it on -off -forward and reverse for a conveyor belt. Can you guys give some guidance about this wiring and define this motor?

                        thanks  

RE: motor unknown

Get a multimeter, measure the resistances between terminals, and post the results. We're engineers, not magicians. smile
  

----------------------------------
  
If we learn from our mistakes I'm getting a great education!
 

RE: motor unknown

Serious? If this application is of any importance, how are you planning to maintain it without knowing anything about the motor? Spare motor will be a problem, for obvious reasons.

Get a new motor that suits the application. A single phase motor has a rather low starting torque and conveyors are known to have a high torque demand at start. Chances are that it will not start. Use a VFD and a three-phase induction motor. Dirt cheap it is also.

Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...

RE: motor unknown

(OP)
This motor is from an existent used dough sheeter, which uses two conveyors tables that run forward and reverse.This machine came with this motor disconected to its control, besides that, it didn't have any spec tagged  on it.


 ----------I          
           I---RED----------------7     ohms readings
           I                            1-4= 16 ohms
           I---YELL---------------2     1-7= 2.7ohms
 MOTOR     I                            4-7= 5.5 ohms
 TERMINAL  I                            no reading on yell
 BOX       I---BLK----------------4     and 1-4-7
           I
           I---BLK----------------1
           I
           I----YELL--------------5
 --------- I         


   I connected 1-5 and 4-2 to 220 volts and worked cw.then
   I switched  1-2 and 4-5 then work ccw.
   The amps reading at 4 and 1 was 2.5 amps.
   Note:the motor was unloaded.
        also I had some reading on 7 and     
        ground,about 45 volts. while the motor was running.  

RE: motor unknown

Sorry ferny. If you can't even bother to turn your diagram right (instead of upside down) - how can you expect that anyone is interested in helping you?

Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...

RE: motor unknown

Hi Gunnar I wrote something similar but then didn't bother to post it.

Bill
--------------------
"Why not the best?"
Jimmy Carter

RE: motor unknown

Yes, we are both too grumpy these days smile

Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources