SBL Magnaturn Retrofit


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Thread: SBL Magnaturn Retrofit

  1. #1
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    Default SBL Magnaturn Retrofit

    So here is my next project. It is a South Bend Lathe. PC based Magnaturn from the early to mid 80s. And probably had not been cleaned since that time also. Dug out over 15 gallons of crud from bottom of machine.
    Machine ran from two floppy drives. When i got it from owner it was not working. Turned out to be one of the floppies was corrupted.Got it running....but what a pig on power. It has a 15HP 3 phase motor that ran a bunch of hydraulic cylinders and motors.
    The system was very impressive tho. As the movement of axis was done with hydraulic cylinders and had scales for closing the loop. I did position tests of .0005" with no problems. But, machine just took to many amps to run. Took about 50amps to get it started!
    Here is some pics of bringing it home and before it got a LONG over do bath.

    Troy

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    Attached Thumbnails Attached Thumbnails SBL Magnaturn Retrofit-cleaned-new-home-jpg   SBL Magnaturn Retrofit-trailer-jpg   SBL Magnaturn Retrofit-img_0001-jpg   SBL Magnaturn Retrofit-img_0002-jpg  

    SBL Magnaturn Retrofit-img_0003-jpg   SBL Magnaturn Retrofit-img_0004-jpg   SBL Magnaturn Retrofit-img_0005-jpg  
    Last edited by Need TECH Help!; 06-24-2018 at 01:35 PM.
    http://www.homecncstuff.elementfx.com/


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    Gold Member TomKerekes's Avatar
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    Default Re: SBL Magnaturn Retrofit

    Hi Troy,

    Wow. I've heard that hydraulic servos can be very accurate. I believe it was employed on some early semiconductor manufacturing equipment.

    Looking forward to see what you do with it. What's the game plan?

    Regards



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    Default Re: SBL Magnaturn Retrofit

    Hay Tom,
    To get it up and running with just a toolpost. And later will tackle the turret.
    Lathe will be ballscrew with 750W AC servos directly coupled. Spindle hydraulic motor is replaced with a 5 HP Marathon Black Max motor driven by a TECO-Westinghouse A510 VFD.
    And of course... Dynomotion boards. KFLOP/Kanalog/Konnect combo.
    Got some more pics coming...

    http://www.homecncstuff.elementfx.com/


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    Default Re: SBL Magnaturn Retrofit

    Here is some more pics of the hydraulic mess before removal.

    Attached Thumbnails Attached Thumbnails SBL Magnaturn Retrofit-003-jpg   SBL Magnaturn Retrofit-001-jpg   SBL Magnaturn Retrofit-002-jpg  
    http://www.homecncstuff.elementfx.com/


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    Default Re: SBL Magnaturn Retrofit

    Out with the old.....

    Attached Thumbnails Attached Thumbnails SBL Magnaturn Retrofit-img_0001-jpg   SBL Magnaturn Retrofit-img_0002-jpg   SBL Magnaturn Retrofit-img_0003-jpg   SBL Magnaturn Retrofit-img_0006-jpg  

    SBL Magnaturn Retrofit-img_0007-jpg  
    http://www.homecncstuff.elementfx.com/


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    Default Re: SBL Magnaturn Retrofit

    Out with the old electronics... Its something to see how tech has changed the graphics card is about the size of a mini atx motherboard.

    Attached Thumbnails Attached Thumbnails SBL Magnaturn Retrofit-img_0003-jpg   SBL Magnaturn Retrofit-img_0002-jpg   SBL Magnaturn Retrofit-img_0001-jpg  
    http://www.homecncstuff.elementfx.com/


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    Gold Member TomKerekes's Avatar
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    Default Re: SBL Magnaturn Retrofit

    So what are you keeping? The feet?



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    Default Re: SBL Magnaturn Retrofit

    Those and maybe a fan.

    http://www.homecncstuff.elementfx.com/


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    Default Re: SBL Magnaturn Retrofit

    Had to replace the turcite on the saddle(Z axis). It was thin and peeling off. Glued on some new and milled it down with a fly cutter. Stuff machines so easy. Will be getting it hand scrapped also.
    Troy

    Attached Thumbnails Attached Thumbnails SBL Magnaturn Retrofit-millingnewturcite-jpg  
    http://www.homecncstuff.elementfx.com/


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    Default Re: SBL Magnaturn Retrofit

    Now got ballscrews,servos and spindle motor mounted. This was a tight fit on X axis ballscrew as there was not much room at all for a 1" screw and nut. And got the way lube flow figured out. Now onto mounting some electrical components.
    Troy

    Attached Thumbnails Attached Thumbnails SBL Magnaturn Retrofit-zaxisballnutmount-jpg   SBL Magnaturn Retrofit-zaxisscrew1-jpg   SBL Magnaturn Retrofit-xaxisscrew2-jpg   SBL Magnaturn Retrofit-xaxisscrew1-jpg  

    SBL Magnaturn Retrofit-zaxisscrew2-jpg   SBL Magnaturn Retrofit-xaxismotor-jpg  
    http://www.homecncstuff.elementfx.com/


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    Default Re: SBL Magnaturn Retrofit

    nice job!



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    Default Re: SBL Magnaturn Retrofit

    Needed some more room for electrical stuff. So made a custom electrical box.

    Attached Thumbnails Attached Thumbnails SBL Magnaturn Retrofit-emptyhole-jpg   SBL Magnaturn Retrofit-box1-jpg   SBL Magnaturn Retrofit-box2-jpg   SBL Magnaturn Retrofit-box3-jpg  

    SBL Magnaturn Retrofit-box4-jpg  
    http://www.homecncstuff.elementfx.com/


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