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The Shop => Tools => Topic started by: andre on April 12, 2013, 12:38:22 AM

Title: CNC Lathe Conversion
Post by: andre on April 12, 2013, 12:38:22 AM

Hi guys My Name is   Andre I turn  this year. For my major high school project I am converting Myturn sl7 lathe to CNC.

Title: Re: CNC Lathe Conversion
Post by: Rob.Wilson on April 12, 2013, 05:43:54 AM

Hi Andre

Cool project ,  :thumbup:  I hope you share doing the conversion with us here on Madmodder  :poke:

Rob

Title: Re: CNC Lathe Conversion
Post by: andre on April 12, 2013, 08:24:58 AM

(https://lh6.googleusercontent.com/-RAe6E_9QknM/USqzg7Bf7TI/AAAAAAAAAwM/1K7L70233MU/s711/_KGrHqFHJEgFEQIBIMs4BRItG5M8Jg_60_3.jpeg)

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  :scratch:


laying out holes in the mill

(https://lh5.googleusercontent.com/-zQC1xZCzqhg/UVYC9Wnp-pI/AAAAAAAAA0Q/4YHgoD3-EjU/w557-h416-p-o/IMG_20130330075211.jpg)

Hole sawing excess stock

(https://lh6.googleusercontent.com/-gP7NazqkuP0/UVves0hTrNI/AAAAAAAAA04/m_YR9ovXFq4/w532-h398-p-o/IMG_20130403184449.jpg)

Using Boring head as a flycutter to make a slot

(https://lh4.googleusercontent.com/-wslQrqWPB_4/UVv7IrJTpaI/AAAAAAAAA1o/hMjKo88hFrY/s533/IMG_20130403194357.jpg)

Title: Re: CNC Lathe Conversion
Post by: John Stevenson on April 12, 2013, 08:31:09 AM

This might help ?

http://www.jeffree.co.uk/pages/ml7-cnc/part-1-files/myfordcncpt1.htm

Title: Re: CNC Lathe Conversion
Post by: andre on April 12, 2013, 08:34:50 AM

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.

(https://lh3.googleusercontent.com/-cmhW69KHXVI/UVwg1YE3lJI/AAAAAAAAA20/dTK9M6g3PtE/s714/IMG_20130403232858.jpg)

(https://lh3.googleusercontent.com/-9_s9LAleyuE/UVwwWyWtF0I/AAAAAAAAA3w/VMA3wmoYH7w/s714/IMG_20130404003518.jpg)

Title: Re: CNC Lathe Conversion
Post by: vtsteam on April 12, 2013, 11:35:13 AM

Andre, very interested in this one. Thanks for sharing!

John Stephenson, excellent link!


 :mmr:

Title: Re: CNC Lathe Conversion
Post by: andre on May 11, 2013, 10:28:03 PM

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  :)

(https://lh6.googleusercontent.com/-PBI5eJCpDJw/UYTkdMoD_PI/AAAAAAAAA70/XAJgtMGWmkU/w714-h533-no/IMG_20130504203422.jpg)

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.

(https://lh3.googleusercontent.com/-9YQeC_Lo-GM/UYwhKMUc0gI/AAAAAAAAA7E/uvKRhNxRjsQ/w714-h533-no/IMG_20130510081909.jpg)

(https://lh6.googleusercontent.com/-eEkSp0QXiro/UYwj4Pt7kgI/AAAAAAAAA74/PDUbIF9B0r0/w714-h533-no/IMG_20130510082752.jpg)

Title: Re: CNC Lathe Conversion
Post by: John Stevenson on May 12, 2013, 05:26:47 AM

Just a heads up but that is not a Myford ML7 lathe but one of the Taiwanese clones. Not that it matters but there may be slight differences for anyone following on.

ML7 has split plain spindle bearings.

These were often marketed at Colt lathes.
see the last photo's at the bottom of this page.
http://www.lathes.co.uk/myford/page15.html