Lathe Conversion, PM1228 to CNC - Page 2


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Thread: Lathe Conversion, PM1228 to CNC

  1. #21
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    Default 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.



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    Default 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.



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    Default 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.



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    Default 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...



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    Default 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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    Default Re: Lathe Conversion, PM1228 to CNC

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

    Lathe Conversion, PM1228 to CNC-2019-07-14-15-55-21-jpg

    Lathe Conversion, PM1228 to CNC-2019-07-14-15-55-29-jpg

    Lathe Conversion, PM1228 to CNC-2019-07-14-15-56-07-jpg

    Attached Thumbnails Attached Thumbnails Lathe Conversion, PM1228 to CNC-2019-07-14-15-56-07-jpg   Lathe Conversion, PM1228 to CNC-2019-07-14-15-55-21-jpg   Lathe Conversion, PM1228 to CNC-2019-07-14-15-55-29-jpg   Lathe Conversion, PM1228 to CNC-2019-07-14-15-56-07-jpg  



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

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

    Lathe Conversion, PM1228 to CNC-flagholder-jpg

    Lathe Conversion, PM1228 to CNC-2019-07-08-12-13-22-jpg

    Lathe Conversion, PM1228 to CNC-2019-07-12-10-33-02-jpg

    Attached Thumbnails Attached Thumbnails Lathe Conversion, PM1228 to CNC-2019-07-08-12-13-22-jpg   Lathe Conversion, PM1228 to CNC-2019-07-12-10-33-02-jpg   Lathe Conversion, PM1228 to CNC-flagholder-jpg  


  8. #28
    Member Azalin's Avatar
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    Default 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.

    Suat
    Proud father, C# developer, Model heli pilot, newbie free time machinist for hobby


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    Default 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.
    Lathe Conversion, PM1228 to CNC-2019-06-15-13-16-00-jpg

    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.
    Lathe Conversion, PM1228 to CNC-2019-06-15-13-16-20-jpg

    I built some covers for the cross slide ways and to cover the 1204 ball screw that replaced the manual lead screw.
    Lathe Conversion, PM1228 to CNC-2019-05-26-18-53-53-jpg

    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.
    Lathe Conversion, PM1228 to CNC-2019-06-15-13-16-24-jpg

    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.
    Lathe Conversion, PM1228 to CNC-2019-05-28-14-48-16-jpg

    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.
    Lathe Conversion, PM1228 to CNC-2019-06-15-13-16-59-jpg

    Another shot of the encoder and a a completely clean spot where there used to be a bunch of greasy gears.
    Lathe Conversion, PM1228 to CNC-2019-06-15-13-16-49-jpg

    A quick and dirty AXA tool rack.
    Lathe Conversion, PM1228 to CNC-2019-05-28-14-50-56-jpg

    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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    Default 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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    Default 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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    Default 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:

    Info:
    https://www.altaros.cz/en/content/53...ic-turret-head



  13. #33
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    Default Re: Lathe Conversion, PM1228 to CNC

    I finally had enough cleaning up the shop of chips. I built a sliding hood for the lathe. Still working on a end cap to shield the headstock.

    Lathe Conversion, PM1228 to CNC-2021-03-06-13-26-01-jpg
    Lathe Conversion, PM1228 to CNC-2021-03-06-13-26-14-jpg

    Attached Thumbnails Attached Thumbnails Lathe Conversion, PM1228 to CNC-2021-03-06-13-26-01-jpg   Lathe Conversion, PM1228 to CNC-2021-03-06-13-26-14-jpg  


  14. #34

    Default Re: Lathe Conversion, PM1228 to CNC

    Great work! That looks slick!

    I just got my 1127 up and running mannually, but I am already looking forward to getting it converted. I've been looking through your build on and off for a few weeks now. My lathe, being bent and dent, didn't come with the stock chip tray. I am okay with that, but I have no idea what would work as an good enclosure for a lathe. So I'll be watching this as your progress.



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    Default Re: Lathe Conversion, PM1228 to CNC

    Quote Originally Posted by CL_MotoTech View Post
    Great work! That looks slick!

    I just got my 1127 up and running mannually, but I am already looking forward to getting it converted. I've been looking through your build on and off for a few weeks now. My lathe, being bent and dent, didn't come with the stock chip tray. I am okay with that, but I have no idea what would work as an good enclosure for a lathe. So I'll be watching this as your progress.
    All my files are out on GRABCAD. Here https://grabcad.com/library/precisio...e-conversion-1



  16. #36

    Default Re: Lathe Conversion, PM1228 to CNC

    I already have it bookmarked!

    How do you like the lathe so far? Has it been worth the hassle?

    I have a fair amount of experience behind manual lathes, I've never used a CNC lathe. That said, all of the lathes I have used, some of them quite nice big brand lathes, all have seen some serious use. This lathe being new actually really impresses me. I have done some beautiful work with it and it's required very little fuss on account of everything being nice and square and wear free. It's not been mutilated are or beat on, everything just works. This is party why I am so excited to get it converted, I think it's going to be pretty straightforward and results should be easy (at least compared to my never ending 0704 project). That said, I tend to agree that the spindle motor isn't outputting what it is rated at. It's definitely wimpy compared to every other lathe I have ever used. I'll probably go for a 1kw BLDC and VFD, something along those lines. I don't think I need 6kRPM, but a bit more grunt would be nice, and obviously I'd like to avoid having to change belts.



  17. #37
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    Default Re: Lathe Conversion, PM1228 to CNC

    The reason I converted mine was so I could do more complex curves that would be almost impossible on a manual. I don't use it too often, partly because it made such a mess everywhere. With the new hood now the chips will stay in one place. Though the conversion took a good amount of time and effort, it is well worth it. I can still do simple manual stuff because I included an X and Z MPG, but most of the things I do are CNC using Fusion 360.

    The biggest problem I had in the conversion was getting a ballscrew inside the cross slide. It did finally work with a 1204 screw with only a few thouthanths to spare. Also, I am glad that I went with direct drive instead of belts. It's a much cleaner solution. There are some things I would do differently. The motor for one. It REALLY needs an AC induction motor with a VFD. The stupid BLDC motor on it has no low end and the controller for it just can't seem to stay at speed. It definitely doesn't need 6k rpm, but 3k would be nice, mine will barely do 2k rpm.

    Here is my latest creation on the lathe. I did 4 of these in 416 stainless and they turned out great but made a mountain of little tiny chips all over the shop. It is a scaled down model of a German Tiger tank muzzle brake for my AR10.

    Lathe Conversion, PM1228 to CNC-2021-02-25-17-58-39-jpg

    Attached Thumbnails Attached Thumbnails Lathe Conversion, PM1228 to CNC-2021-02-25-17-58-39-jpg  


  18. #38

    Default Re: Lathe Conversion, PM1228 to CNC

    Yeah, playing in chips isn't much fun. My VFD is all over the place too. When I max it at 2200 it audibly surges and then backs off.

    The results on those muzzles look awesome. Couldn't ask for much more really.

    I plan to make vintage motorcycle shocks with my lathe and mill. On the lathe it's going to be a lot of long cuts, stuff that would be boring as all get out manually, then threading, o-ring grooves, and a few complex shapes. As a one man operation currently, being able to free myself up for other things (family time is cool) really helps out.



  19. #39
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    Default Re: Lathe Conversion, PM1228 to CNC

    I finished the enclosure. I added the end cap for protect the headstock. It kind of reminds me of an iron lung machine.
    Lathe Conversion, PM1228 to CNC-2021-03-07-14-38-16-jpg
    Lathe Conversion, PM1228 to CNC-2021-03-07-14-38-35-jpg
    Lathe Conversion, PM1228 to CNC-2021-03-07-14-38-50-jpg

    Attached Thumbnails Attached Thumbnails Lathe Conversion, PM1228 to CNC-2021-03-07-14-38-16-jpg   Lathe Conversion, PM1228 to CNC-2021-03-07-14-38-35-jpg   Lathe Conversion, PM1228 to CNC-2021-03-07-14-38-50-jpg  


  20. #40

    Default Re: Lathe Conversion, PM1228 to CNC

    Very cool!

    It looks like it would be on the Jetson's.



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