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  1. #1
    Join Date
    Dec 2017
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    Aldinga Beach
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    Default Repairs to diy router

    Hi, thought i would document this repair in case someone might find it useful. I was asked to "fix" a guy's cnc router, he used it initially a lot when he bought it but it had issues.

    62588035_864193437264844_2141488135647789056_n.jpgsteelframe2.jpg62404013_413803879221449_7778297137263017984_n.jpgoldpanel.jpg

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  3. #2
    Join Date
    Dec 2017
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    Aldinga Beach
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    Default

    So i started on the electrical, they fitted the HY drive on the machine frame just in the open air. This for me is a big no no....these drives do not have an adequate ip rating. It was filled with saw dust. Also the cable from the drive to the motor was not a mains rated cable, they used a microphone screened cable similar to what jaycar sells....around 0.25mm sq on the 2.2 Kw water cooled spindle. The spindle motor was also not earthed, needless to say he had electrical noise issues.

    I made up a new control panel, at this point we might add another drive for a rotary axis....so the panel layout will most likely change. Also the hy drive will most likely go and also the 2.2Kw water cooled spindle.

    The G540 will stay, a additional drive will be required for the rotary axis. The new panel have passed the noise test, however it will be changed...

    IMG20190617132121.jpgpaneltest6.jpg

  4. #3
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    Dec 2017
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    Default

    Even though the water cooled spindle is now earthed we decided not to use it anymore...

    alikat9.jpgalikat1.jpgalikat2.jpgalikat3.jpgalikat13.jpg

  5. #4
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    Dec 2017
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    Aldinga Beach
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    Default

    Some work done on the mechanical. All the linear bearings will be replaced. The y axis only had on ball screw this one is worn and wil be replaced plus another on added. Motor bracket cut off and new brackets to be bolted on.

    alikat10.jpgalikat7.jpgalikat6.jpgalikat5.jpgalikat4.jpgalikat12.jpgalikat14.jpg

  6. #5
    Join Date
    Nov 2013
    Location
    Caboolture QLD AU
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    745

    Default

    Great repair work there Erick. Thanks for posting and especially so with detailed pictures.

    Mike.

  7. #6
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    Dec 2017
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    Aldinga Beach
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    Default

    Thanks Mike. Budget is very limited so i can't do as much as i would like

  8. #7
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    Dec 2017
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    Default

    By posting these pic's i also wanted to show how easy it is to make a machine like this...

  9. #8
    Join Date
    May 2011
    Location
    Murray Bridge SA
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    67
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    3,241

    Default

    Thanks for the report and pics, Erick. Love the 4th axis lathe, what size chuck is that on there?
    Kryn
    To grow old is mandatory, growing up is optional.

  10. #9
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    Dec 2017
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    Aldinga Beach
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    Quote Originally Posted by KBs PensNmore View Post
    Thanks for the report and pics, Erick. Love the 4th axis lathe, what size chuck is that on there?
    Kryn
    Hi Kryn....honestly i am not sure, had a quick look at it and decided not to work on it. It will never be any good/accurate.

  11. #10
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    Dec 2017
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    Some parts arrived so i replaced y axis bearings...lined up the axis and started drilling holes to mount the new ball screws.

    parts300.jpgparts301.jpg

  12. #11
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    Feb 2008
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    NOWRA
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    648

    Default

    Quote Originally Posted by ericks2 View Post
    Even though the water cooled spindle is now earthed we decided not to use it anymore...

    alikat9.jpgalikat1.jpgalikat2.jpgalikat3.jpgalikat13.jpg
    Great work, am curious though why are you not using the Hy and Spindle anymore?

  13. #12
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    Dec 2017
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    Quote Originally Posted by twistedfuse View Post
    Great work, am curious though why are you not using the Hy and Spindle anymore?
    Hi...thank you, i tested both and don't like either

  14. #13
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    So the y-axis is assembled and calibrated. When i moved on to the x-axis i found the mounting plate holes were not done properly. I did not plan to redo this plate but i really don't like the misalignment.

    holes1.jpgholes3.jpgholes4.jpg

  15. #14
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    Helensburgh
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    Eric, I have found that the mounting holes on the linear rail bearings that I have are not accurately positioned and vary quite a bit. There is a video somewhere on YT discussing the positioning and the holes being not central to the axis but off to one side. This is my first rodeo with this stuff and I was very surprised to see the differences in position and Mike found the same thing but did not realise why when he drilled the holes to attach plates/mounts to the bearing blocks he was way out with the holes not matching. I had to be careful and mark a "face side" and it was still a problem even doing that.
    CHRIS

  16. #15
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    Dec 2017
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    Aldinga Beach
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    Quote Originally Posted by Chris Parks View Post
    Eric, I have found that the mounting holes on the linear rail bearings that I have are not accurately positioned and vary quite a bit. There is a video somewhere on YT discussing the positioning and the holes being not central to the axis but off to one side. This is my first rodeo with this stuff and I was very surprised to see the differences in position and Mike found the same thing but did not realise why when he drilled the holes to attach plates/mounts to the bearing blocks he was way out with the holes not matching. I had to be careful and mark a "face side" and it was still a problem even doing that.
    Chris...thanks for the tip, I usually confirm dimensions etc before i machine the plates. The linear bearing blocks i bought are of a better quality than some of the online stuff.

    Anyway i really appreciate the info....

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