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  1. #1
    Join Date
    Jan 2014
    Posts
    19

    gweike laser allignament problem

    after a few months after i've posted here about my gweike problem, i'm comming back to show a video of my stress:

    https://www.youtube.com/watch?v=QwSG...ature=youtu.be

    any help will be apreciated...
    i've replaced the tube a few days back, and still my dots don't overide

  2. #2
    Join Date
    Jan 2008
    Posts
    940

    Re: gweike laser allignament problem

    It looks like the one corner of your table is higher or lower than the rest. I would adjust the mirror to hit the low corner and shim the 3rd one to match the 4thone

  3. #3
    Join Date
    Jan 2014
    Posts
    19

    Re: gweike laser allignament problem

    Quote Originally Posted by fixtureman1 View Post
    It looks like the one corner of your table is higher or lower than the rest. I would adjust the mirror to hit the low corner and shim the 3rd one to match the 4thone
    up and down left, and up right are in the same place, on the 4th, lower right, the beam is lower, in this video...
    i can allign the beam this way, or, same spot in left up, right up-down, but it will be higher on the left down...
    sugestions are welcomed

  4. #4
    Join Date
    Nov 2012
    Posts
    492

    Re: gweike laser allignament problem

    Go to rabbit laser USA and read the tutorial on aligning the laser mirrors, follow his method step by step and I think you'll be ok

  5. #5
    Join Date
    Nov 2014
    Posts
    284

    Re: gweike laser allignament problem

    https://www.youtube.com/watch?v=KhhOHUe_b6o
    About 10 minutes in the alignment starts

  6. #6
    Join Date
    Jan 2014
    Posts
    19
    Quote Originally Posted by Bigbird48 View Post
    Go to rabbit laser USA and read the tutorial on aligning the laser mirrors, follow his method step by step and I think you'll be ok
    I followed them... And gweike tutorial...
    I can't find a video with something close to my problem...
    In the last 6 months, i lost over 200 hours trying to fix that

  7. #7
    Join Date
    Jun 2014
    Posts
    611

    Re: gweike laser allignament problem

    Why not ask Gweike tech person directly? ask them to make a videos to you.

    Quote Originally Posted by sanyyos View Post
    I followed them... And gweike tutorial...
    I can't find a video with something close to my problem...
    In the last 6 months, i lost over 200 hours trying to fix that

  8. #8
    Join Date
    Jan 2008
    Posts
    940

    Re: gweike laser allignament problem

    Leave the left mirror where it is and shim the up right corner Half the distance that is off and adjust the left mirror to hit the center. I had to do this on my laser

  9. #9
    Join Date
    Nov 2014
    Posts
    284

    Re: gweike laser allignament problem

    If it truly isn't an alignment problem then perhaps fixtureman above has your solution. Try say starting with the left hand "y" rail and adjust it dead n-ts level and the do the same for the other 3 rails. You won't get anywhere if the rails are not all in the same plane.

  10. #10
    Join Date
    Jan 2014
    Posts
    19

    Re: gweike laser allignament problem

    my bubble say it's on the same plane, but i think it's a small diference... how can i check the rails?

  11. #11
    Join Date
    Nov 2014
    Posts
    284

    Re: gweike laser allignament problem

    If the rails are on the same plane then it's mirrors.

  12. #12
    Join Date
    Jan 2008
    Posts
    940

    Re: gweike laser allignament problem

    I just looked again at the video and it doesn't look like it is hitting the center of your final mirror. Remember that it is only off by half of what is showing if it needs to be shimmed

  13. #13
    Join Date
    Jan 2014
    Posts
    19

    Re: gweike laser allignament problem

    yes, the beam is hitting above the center of the last mirror... that is the closest point i can get for the allignament... if i lower the dot, to the center, then, the distance of the dots from up left to the low right is muuuch bigger... i can do a video about that, too...
    after a few hours of measurments, i can say my rails are on the same plane, and none of them is lower or higher in any part of the table... so far, so good

  14. #14
    Join Date
    Jan 2008
    Posts
    940

    Re: gweike laser allignament problem

    Quote Originally Posted by sanyyos View Post
    yes, the beam is hitting above the center of the last mirror... that is the closest point i can get for the allignament... if i lower the dot, to the center, then, the distance of the dots from up left to the low right is muuuch bigger... i can do a video about that, too...
    after a few hours of measurments, i can say my rails are on the same plane, and none of them is lower or higher in any part of the table... so far, so good

    That in itself tells me that your right side is low. If you shim it up you should be able to hit closer to the center.

  15. #15
    Join Date
    Jan 2014
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    19

    Re: gweike laser allignament problem

    Quote Originally Posted by fixtureman1 View Post
    That in itself tells me that your right side is low. If you shim it up you should be able to hit closer to the center.
    pls tell me what "shim it up" really means... my english is not verry good

  16. #16
    Join Date
    Nov 2014
    Posts
    284

    Re: gweike laser allignament problem

    I'll try to find time today to show where we are talking about shimming. I need to take my machine apart and make pictures of installing my latest z table conversion kit anyway for ebay so that's the same area. I'm still doing family business today so I'm not sure I'll get to it but I'll try. Something in the front right corner (I hope I've got the correct corner) holds the rail to the case. What fixtureman is saying is change that mounting to get the rail a little (washer under the rail, slot the screw hole if it's attached on the side, etc. The rail has to go"up" slightly where the beam hits "low".

  17. #17
    Join Date
    Jan 2014
    Posts
    19

    Re: gweike laser allignament problem

    Quote Originally Posted by buddydog View Post
    I'll try to find time today to show where we are talking about shimming. I need to take my machine apart and make pictures of installing my latest z table conversion kit anyway for ebay so that's the same area. I'm still doing family business today so I'm not sure I'll get to it but I'll try. Something in the front right corner (I hope I've got the correct corner) holds the rail to the case. What fixtureman is saying is change that mounting to get the rail a little (washer under the rail, slot the screw hole if it's attached on the side, etc. The rail has to go"up" slightly where the beam hits "low".
    the beam is going down from left up to right down...... it's up at the following corners: left up and down, as you look at the machine, and at right up corner... then, as you go to the right down, next to the control pannel, the place farrest from the tube exit, the beam is going down...
    i never read anything about how can the rails be fixed and never seen a video about it...
    and i have no one to call to help me in the process, so it will be anything but not fun

  18. #18
    Join Date
    Jan 2015
    Posts
    1

    Re: gweike laser allignament problem

    Did you check the alignment of the laser housing itself (just a thought). For me it looks like the corner where the controls are is higher then the rest and you can't adjust it with the normal alignment process. This will force the laser dot to be lower on this site as on other positions. If you got the laser new that can be a result of improper handling during the shipping. If the laser was dropped on the corner of the controls it might be minor without visible damage but can be the case that the mounting locations of the rails are slightly off and not straight at all. You wrote you checked it with a bubble level but this might be not sufficient and accurate enough. If you have the chance to check it with a digital level might show you a slide difference. This is just another point to consider and to check.

  19. #19
    Join Date
    Jan 2014
    Posts
    19

    Re: gweike laser allignament problem

    Quote Originally Posted by xomox View Post
    Did you check the alignment of the laser housing itself (just a thought). For me it looks like the corner where the controls are is higher then the rest and you can't adjust it with the normal alignment process. This will force the laser dot to be lower on this site as on other positions. If you got the laser new that can be a result of improper handling during the shipping. If the laser was dropped on the corner of the controls it might be minor without visible damage but can be the case that the mounting locations of the rails are slightly off and not straight at all. You wrote you checked it with a bubble level but this might be not sufficient and accurate enough. If you have the chance to check it with a digital level might show you a slide difference. This is just another point to consider and to check.
    i tried to lower the machine from the front feets... and rise from the back... still same problem...

  20. #20
    Join Date
    Jan 2008
    Posts
    940

    Re: gweike laser allignament problem

    Raising the legs will not work what you have to do is unbolt the track an put a washer or shim between the frame and track.look at the pic and see the red circle that I drew to see where I would shim it.
    Attached Thumbnails Attached Thumbnails shim.jpg  

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