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  1. #21
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    Dec 2012
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    Re: Lathe Conversion, PM1228 to CNC

    Quote Originally Posted by maxspongebob View Post
    I just haven't gotten around to replacing it yet. My mill is a G0704 and I am not sure that it could handle whittling down a chunk of steel that big. This is what I have in mind.

    Do you think that using Aluminum would be acceptable?
    I'm converting my WM290 (one step down from yours) and I have basically the same mill as you, and I managed to make a steel spacer, more or less. I didn't make it very elaborate, just a rectangular block, so your mill should be able to make something as well. Aluminium might work, but I would suggest to use steel.

  2. #22
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    Re: Lathe Conversion, PM1228 to CNC

    Quote Originally Posted by asuratman View Post
    It helps you zeroing tools ...
    Not really, because if you move the compound slide to zero one tool, you will throw off the offsets of all the other tools. I guess you can move it to find the difference between the various tools and input the differences manually, but then you would need to make sure you reset the compound and lock it so it doesn't move inadvertently.

  3. #23
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    Jan 2014
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    Re: Lathe Conversion, PM1228 to CNC

    Quote Originally Posted by Stigoe View Post
    I'm converting my WM290 (one step down from yours) and I have basically the same mill as you, and I managed to make a steel spacer, more or less. I didn't make it very elaborate, just a rectangular block, so your mill should be able to make something as well. Aluminium might work, but I would suggest to use steel.
    Why not use a chunk of cast iron? It is relatively easy to machine (although dirty) and would be better for rigidity and vibration damping than either Steel or Aluminum. You can buy cast stock from most metal suppliers as well as McMaster Carr.

  4. #24
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    Re: Lathe Conversion, PM1228 to CNC

    Quote Originally Posted by mcardoso View Post
    Why not use a chunk of cast iron? It is relatively easy to machine (although dirty) and would be better for rigidity and vibration damping than either Steel or Aluminum. You can buy cast stock from most metal suppliers as well as McMaster Carr.
    Sure, cast iron would work. I can't buy anything from McMaster-Carr though, since I don't live in USA. I got the piece of steel I used from the school I got to machine my mill column for linear bearings. Where I live it's not so easy to get hold of stock material. At least, I don't know of any easy ways...

  5. #25
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    Sep 2005
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    1093

    Re: Lathe Conversion, PM1228 to CNC

    Not really, because if you move the compound slide to zero one tool, you will throw off the offsets of all the other tools.
    You are right, its OK if only for one tool for use such as facing ...

  6. #26
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    Mar 2017
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    Re: Lathe Conversion, PM1228 to CNC

    Ok, the compound is replaced with a big chunk of Aluminum.





    Attached Thumbnails Attached Thumbnails 2019-07-14 15.56.07.jpg  

  7. #27
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    Re: Lathe Conversion, PM1228 to CNC

    First project completed. I needed a flag mount for the boat.






  8. #28
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    Mar 2014
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    Re: Lathe Conversion, PM1228 to CNC

    That spindle looks very easy to change chucks. I wish mine had one of these.

    Very nice and clean build.

  9. #29

    Re: Lathe Conversion, PM1228 to CNC

    Quote Originally Posted by maxspongebob View Post
    A few years ago I converted my G0704 mill to CNC and can use it it make most of the parts I need. However without a lathe, there is a lot of stuff I can't do. So I purchased a Precision Mathews 1228MV lathe. As a small manual machine, it's pretty good, but some of the parts I want to make have complex curves that are a pain on a manual machine. So, I found myself doing a conversion of it as well. Since I love looking at others photos of machines, here are mine.

    Here is a full shot of the system. The only thing remaining to complete is some software for the LCD panel on the console. I will be programmed to display the spindle speed and will set the switches for multiple functions.


    Closeup of the cross slide. The RED parts are 3D printed parts. Mostly they are covers. The tube that goes from the front to back of the saddle is how I routed the cables to some electronics on the front of the saddle.


    I built some covers for the cross slide ways and to cover the 1204 ball screw that replaced the manual lead screw.


    I used ClearPath servo's on both Z and X axis. Both are direct drive. Z has a 1605 screw hidden under this cover. The Red object with the stainless socket screw is a carrier for the magnet that triggers the Z limit switch. It can slide back and forth so there is less chance of running the tool into the chuck.


    There is the X Axis servo hiding on the back of the saddle under the cover. I used a cable drag track to get the wiring onto the saddle.


    Designing and building the spindle encoder was the most difficult part of the conversion. The spindle has a 65 tooth gear that used to drive all the other gears on the head. I bought another gear and use it to drive a rotary encoder. Since I didn't want to make any new holes in the casting unless I had to, this is where it wound up. Unfortunately It sticks up above the top of the spindle housing so the cover door no longer fits. Oh well, who needs the safety covers anyhow.


    Another shot of the encoder and a a completely clean spot where there used to be a bunch of greasy gears.


    A quick and dirty AXA tool rack.


    I will put the electronics in another post.
    Nice work.
    http://cncmakers.com/cnc/controllers/CNC_Controller_System/CNC_Retrofit_Package.html

  10. #30

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    Aug 2019
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    295

    Re: Lathe Conversion, PM1228 to CNC

    Quote Originally Posted by Jim Dawson View Post
    I think that is the nicest looking conversion I have ever seen. Great job!
    +1. I'll refrain to show-off my lathe now lol. Good lord, that tool is beautiful, bet it does good parts too. Good job.

  11. #31
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    Mar 2017
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    Re: Lathe Conversion, PM1228 to CNC

    It does a nice job. I do wish that it had a bit more power and range of spindle RPM, however. These Chinese BLDC motors are not the best and are severely over rated.

    I do have a new tool coming thought that I am excited about here is the thread on it. https://www.cnczone.com/forums/uncat...82710-cnc.html

  12. #32

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    Sep 2019
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    2

    Re: Lathe Conversion, PM1228 to CNC

    If you're still working on your CNC lathe, I'd like to show you the possible improvements made just for you. It is a device for automatic exchange of up to 8 tools at an affordable price. Suitable for Mach software.
    Video:
    https://www.youtube.com/watch?v=EBXyO_Fw4GU&t=130s
    Info:
    https://www.altaros.cz/en/content/53...ic-turret-head

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