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Thread: Electric motor help ...Is anyone here a master of Electronics?

  1. #16
    Join Date
    Nov 2013
    Location
    Oxford CT, New Haven County
    --
    984
    someone else said to use this? but I don't know how to even begin to know what to do with that thing! lol

    http://www.parts-express.com/400v-25...m_campaign=pla

    I was just looking for an easy, inexpensive way to be able to put a plug on the end of this motor and plug it into my wall socket and make it run... lol Is that possible to do for somewhere under $100.00 or even under $50.00? Its a $30.00 motor lol I can try and find another one on Ebay. I figured this one was off a bench top mill so it would be fine for a small lathe or mill.

  2. #17
    Join Date
    Aug 2015
    Location
    Idaho
    --
    843
    Quote Originally Posted by czac View Post
    someone else said to use this? but I don't know how to even begin to know what to do with that thing! lol

    http://www.parts-express.com/400v-25...m_campaign=pla

    I was just looking for an easy, inexpensive way to be able to put a plug on the end of this motor and plug it into my wall socket and make it run... lol Is that possible to do for somewhere under $100.00 or even under $50.00? Its a $30.00 motor lol I can try and find another one on Ebay. I figured this one was off a bench top mill so it would be fine for a small lathe or mill.
    The bridge rectifier, from my understanding, will smooth out the ac current and kick it out as D.C. How it is used in your application is above my realm of expertise. I'm an electrician that took a crash course on this 25 years ago and still learning. To hook it up, there's an in and out. They are diagonal from each other. If nobody here can help, you could try here:
    https://www.google.com/url?sa=t&sour...UGVp7CCHxwAVEQ.
    You don't need to control the speed?


    Sent from my iPhone using Tapatalk

  3. #18
    Join Date
    Nov 2013
    Location
    Oxford CT, New Haven County
    --
    984
    Quote Originally Posted by Jd110 View Post
    You don't need to control the speed?
    lol Yeah, I do...or would like to. lol (see? thats how much I know about this....lol) thanks.

  4. #19
    Join Date
    Aug 2015
    Location
    Idaho
    --
    843
    I'm still that way with certain electronic devices. Anyway, I'll try to get with a couple guys I know here that enjoy being used and abused. If nobody has helped you, I'll try to get you an answer this weekend.
    In the meantime, a picture of the name plate will be needed.


    Sent from my iPhone using Tapatalk

  5. #20
    Join Date
    Mar 2009
    Location
    new england
    --
    1,391
    Parts were maybe 15 bucks, although the rheostat was from a tag sale

    Rheostat is big blue thing, just an ac speed controller. I'm sure there is a D.C. Version.


    Behind that is my bridge rectifierand capacitor(capacitor is not needed to run, careful w this set up, a bleed resistor would be safer.

    Goes like this, ac plugged into speed control, that connects via 2 prongs on rectifier. 2 other prongs on rectifier go to your D.C. Motor. I added a capacitor in parallel to D.C. Motor to smooth out the wave, (not necessary)

    So speed control then 2 wires to bridge and 2 out to D.C. Motor and capacitor connected together



    Now if I could get some help with a phase converter making 300 v when only 240 is going in , black magic I say
    Last edited by plastikosmd; 02-08-2017 at 08:26 PM.

  6. #21
    Join Date
    Aug 2008
    Location
    MN
    --
    3,263
    I've done this by adapting a treadmill motor to a drill press, just used a few basic parts like a bridge rectifier and filter cap to get DC then a PWM controller for speed control of the motor, that all worked out pretty great.
    ---------------------------------------------------------
    1984 Honda ATC200ES "Big Red"
    1982 ATC200E "Hondie"
    1988 TRX300FW "Project Quad" Still in progress....

  7. #22
    Join Date
    Mar 2009
    Location
    new england
    --
    1,391
    ^good thought

    On one site I frequent, there was a great post "treadmills for dummies"
    Very handy to find easy machines to convert
    http://bbs.homeshopmachinist.net/thr...ight=Treadmill

  8. #23
    Join Date
    Nov 2013
    Location
    Oxford CT, New Haven County
    --
    984
    Awesome Thanks! But I have a couple questions here...

    The Seller said My motor was off a Grizzly, G0704 Milling / Drilling machine But on the Grizzly site it says the G0704 has a Universal motor and what i have is not a universal motor. It looks to be the exact motor I have on my 7x10 Harbor freight Lathe.

    Quote Originally Posted by plastikosmd View Post
    Rheostat is big blue thing, just an ac speed controller. I'm sure there is a D.C. Version.
    So do I need a DC Speed controller for the DC motor or Do I need an AC Speed Controller because I will be using AC current? I have one of those ones you plug your router into and then plug into the wall outlet to control the router speed...


    Quote Originally Posted by plastikosmd View Post
    Behind that is my bridge rectifier and capacitor(capacitor is not needed to run, careful w this set up, a bleed resistor would be safer.
    What size Bridge rectifier do i need?
    What size Capacitor do I need?
    What would be better, WITH the capacitor or Without?
    What is a Bleed Resistor?
    And Why "Be Careful with this set up"? whats the danger?


    Quote Originally Posted by plastikosmd View Post
    Goes like this, ac plugged into speed control, that connects via 2 prongs on rectifier. 2 other prongs on rectifier go to your D.C. Motor. I added a capacitor in parallel to D.C. Motor to smooth out the wave, (not necessary)
    Plug Speed controller into the wall socket, 110VAC
    other two wires from Speed Controller goes to Bridge Rectifier.
    then two wire come off Bridge Rectifier and goes to (Capacitor, Cap. then wired to motor) or to DC motor. I think I got it.

    Sorry for all the questions...

  9. #24
    Join Date
    Nov 2013
    Location
    Oxford CT, New Haven County
    --
    984
    Quote Originally Posted by Jd110 View Post
    a picture of the name plate will be needed.
    Thanks!
    I will try to remember to grab a pic tonight when I get home from work!

  10. #25
    Join Date
    Nov 2013
    Location
    Oxford CT, New Haven County
    --
    984
    Thanks kb0nly,

    I heard alot of guys using treadmill motors but Im not sure what size to get... just like the sewing machine motors too. I see them on Ebay but i don't know which size I should look for. Right now In my head I look for 250 Watt, 110VAC or Universal motors with like 1.5 or 2 Amps because I thought I read someplace thats what someone was using and said it worked well. lol other than that I have no clue.
    I do know the Sherline lathe / mill motor I have is a 90 watt and it seems way under powered, same goes for the motor on my old Uni-mat lathe... it is also a 90 watt and doesnt seem to have enough power. and by power i mean you can almost stop it from spinning too easily. I guess I would say I am looking for a motor with better torque?

  11. #26
    Join Date
    Nov 2013
    Location
    Oxford CT, New Haven County
    --
    984
    Quote Originally Posted by plastikosmd View Post
    ^good thought

    On one site I frequent, there was a great post "treadmills for dummies"
    Very handy to find easy machines to convert
    http://bbs.homeshopmachinist.net/thr...ight=Treadmill
    good im gonna go check it out! thanks!

  12. #27
    Join Date
    Nov 2013
    Location
    Oxford CT, New Haven County
    --
    984
    thats an interesting site. I may have to look into a treadmill motor.. lol Thanks again!

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