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  1. #1
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    Default Another interesting option for lathe/mill motor replacement

    Brand NEW Servo Motor FOR Industrial Sewing Machine | eBay

    I was browsing for industrial sewing machines seeing as we're well into making my sails and the usual rule is kicking in - buy all the good tools for the job you just *finished*.

    Anyway, *if* these things really do give 1 HP and good torque over a reasonable speed range, the price doesn't strike me as outrageous, seeing as it's a motor and controller.

    No current intention of buying one, just tossing it out there in case anyone else finds it interesting.

    Baby HBM should be home late next week. I went and patted its lovely paintwork today.

    PDW

  2. #2
    Join Date
    May 2012
    Location
    Victoria
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    Gday Pete,
    I can't input on the servo motors as my 2 industrial sewing machines have only had the clutch jobs.
    My latest compound machine is great, maximum stitch length is 7 mm and has heaps of power. Not a sail makers as zig zag is the go for sails but is great for canvas, PVC, clear etc.
    chears Bruce

  3. #3
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    I would have thought that servo motors and/or stepper motors wouldn't be all that flash for lathes etc. because they move in small steps albeit very tiny ones. This would surely have an affect on the finish. Many people say that machines with 3 phase motors produce a noticably better finish than single phase motors because of the smoothness at which they run, surely even more so with stepper or servo motors?

    Simon
    Girl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.

  4. #4
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    Sep 2009
    Location
    Newcastle
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    144

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    Servos don't move in steps. 'Servos' are just motors with a rotary encoder (not a specific type of motor). The encoder provides position feedback to the controller. Position, speed and acceleration can be determined.

    A 'servo' can be used for positioning, with energy applied (or not applied) in the necessary direction to maintain position (usually rapidly alternating input)

    Large CNC lathes use servos as spindles.

  5. #5
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    Default

    Quote Originally Posted by simonl View Post
    I would have thought that servo motors and/or stepper motors wouldn't be all that flash for lathes etc. because they move in small steps albeit very tiny ones. This would surely have an affect on the finish. Many people say that machines with 3 phase motors produce a noticably better finish than single phase motors because of the smoothness at which they run, surely even more so with stepper or servo motors?

    Simon
    Steppers, yes. Servos, not sure. I do know there's been some very successful conversions of Monarch 10EE lathes done using high power servo drive motors. Which is why I thought it might be a goer. Not at all my field of expertise, I just thought it interesting that they were available for a pretty reasonable price.

    PDW

  6. #6
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    Quote Originally Posted by argeng View Post
    Gday Pete,
    I can't input on the servo motors as my 2 industrial sewing machines have only had the clutch jobs.
    My latest compound machine is great, maximum stitch length is 7 mm and has heaps of power. Not a sail makers as zig zag is the go for sails but is great for canvas, PVC, clear etc.
    chears Bruce
    We're using a Sailrite with zig-zag. Works fine, not a cheap machine. Only problem with it is, it belongs to my friends who are setting off to New Zealand in a couple of weeks so we're under the gun to get all my sewing done before they load their machine back into their sailboat. They won't be back here for a minimum of 15 months and possibly 6 years.

    I expect I'll end up buying my own but I'm open to suggestions here. Really it has to do zig-zag though. The Sailrite is $1500 plus essential 'accessories'. That's more than I paid for a HBM!!!

    PDW

  7. #7
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    Melbourne
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    Quote Originally Posted by PDW View Post
    Steppers, yes. Servos, not sure. I do know there's been some very successful conversions of Monarch 10EE lathes done using high power servo drive motors. Which is why I thought it might be a goer. Not at all my field of expertise, I just thought it interesting that they were available for a pretty reasonable price.

    PDW
    I know steppers are not smooth (they typically have 1.8 deg steps) but I didn't realise that servo motors are essentially step less. If they use them for 10EE lathes then they must be a good conversion. You wouldn't use anything substandard on a 10EE, what would be the point?

    Interesting….

    Simon
    Girl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.

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