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Thread: Myturn sl7

  1. #1
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    Default Myturn sl7

    Hi guys I picked up the myturn lathe that was on eBay it's a Taiwanese copy of a Myford ML7.I am planning to convert it to CNC for my major High school project.



    BETTER TO HAVE TOOLS YOU DON'T NEED THAN TO NEED TOOLS YOU DON'T HAVE

    Andre

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    Good project Welder, keep us posted on this. It interests me but I reckon that all that computery
    stuff is a bit beyond me, where do you start ?

    john

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    Its for design and technology?

    What sort of controllers are you looking at? I was contemplating doing a CNC conversion with an arduino and GRBL, just getting my head around the task at this point though.

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    The project is for Design and Technology course. I plan to use Mach3 ArtSoft USA - Home of Mach3 and LazyCam
    BETTER TO HAVE TOOLS YOU DON'T NEED THAN TO NEED TOOLS YOU DON'T HAVE

    Andre

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    Well I have started the bracket which will bolt to the rear of the lathe and hold the stepper motor. I also need to fit thrust bearing to the lead-screw although I am not to sure how to do this

    laying out holes in the mill


    Hole sawing excess stock



    Boring to size

    BETTER TO HAVE TOOLS YOU DON'T NEED THAN TO NEED TOOLS YOU DON'T HAVE

    Andre

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    Using Boring head as a flycutter to make a slot



    Milling slots steeper motor mount

    =



    o
    The next stage was making the section which will actually attach to the lathe. I had to mill out a groove the allow the bracket to sit on the raised section of lathe bed



    Milling slot




    Almost completed bracket
    BETTER TO HAVE TOOLS YOU DON'T NEED THAN TO NEED TOOLS YOU DON'T HAVE

    Andre

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    Looking good. Will be a interesting project.

    Ben

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    Okay I have installed the thrust bearings onto the lead screw and boy what a difference it makes I can now move the carriage by turning the lead screw with one finger



    I then machined a new bush for the end of the shaft with two flats and a thread to replace the previous nut and collar arrangement It will also give me a shaft to mount the lead-screw drive pulley on.



    BETTER TO HAVE TOOLS YOU DON'T NEED THAN TO NEED TOOLS YOU DON'T HAVE

    Andre

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    Okay here are a few more photos, To ensure that the thrust bearings had a good face to ride on I faced the bushing which holds the leadsrew I did this in the 3 jaw chuck to ensure it was parallel. The second set of photos are the leadscrew I used the fixed steady to machine it.
    Attached Images Attached Images
    BETTER TO HAVE TOOLS YOU DON'T NEED THAN TO NEED TOOLS YOU DON'T HAVE

    Andre

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    Good to see some pics Andre.....although i'm not sure what i'm looking at in the first one?

    I'm toying with the idea of making an EFS (electronic feed shaft....as apposed to ELS...) and am waiting to see how you go about it before i really start thinking about it.

    Cheers,
    Ew
    1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.

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    Thanks for the. Comment Ew it's good to know someone's watching. The first picture is the bracket which used to holds the cross slide screw the quality is appalling holds drilled off centred, holes tapped at a 5. Degree angle the list goes on.
    Attached Images Attached Images
    BETTER TO HAVE TOOLS YOU DON'T NEED THAN TO NEED TOOLS YOU DON'T HAVE

    Andre

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    Watching every new post sitting back enjoying the WiP

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    Watching and enjoying..

    A couple of question for you.

    Have you sized up your motors and pulleys yet?
    Are you going to be driving the spindle as well? ie threading?

    -Josh

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    Yes me too am watching this modification. the M E Workshop magazine recently was doing a retro fit to cnc on a Myford .
    never owned a Myford but seems to be the back bone of the Model Engineer.Have a brace of Drummonds here and fore runner of ML7 that is derived from a Drummond M series. These old Drummonds are great old machines and do accurate work equivalent to the multitude of Asian machines.A 1902 model here cuts as accurately as the day it was made.Keep up the good work John.

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