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  1. #41
    Another fabrication day.
    Done some welding, this time I used 0.6mm wire for trial. Have to say that I am happy with results as my profile thicknes is 2.5mm and other plates are 5mm at this stage.
    Click image for larger version. 

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    Welding is all about heat control and avoiding distortion.
    Here is my setting for 0.6mm MIG
    Click image for larger version. 

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    All major welding is done I believe. Cable chain-carier, table top, sensor will be bolted.
    Here is some shots from today:
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    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Last edited by Tom J; 11-12-2015 at 10:22 PM.

  2. #42
    Time for Y axis drive. Gantry legs will be connected under the bed by flat steel 50x5mm.
    I will use only one ballscrew for moving the gantry as this is desktop size machine (travel distance from left to right is 300mm, forward and backwards only 220mm).
    I sacrificed 80mm of travel on Y for bigger distance between bearing block - stiffness won.
    Click image for larger version. 

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    Had to fabricate Ballscrew nut bracket today - picture later.
    Than I can center the ballscrew mount (front and back) so there is no tension on screw when turns backwards/forward.
    A lot of steps in fabrication depends on previous - all related. Can not jump forward without doing something which have to be done first. Sometimes I loose the plot and do something what shouldn't be doing at that time like - pick up for sensors:
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    or sensor bracket/s

  3. #43
    It's the little details that eat the time but they also make the difference between just OK machine and great machine. This is well on way to being great machine so keep it up mate and no rushing.

  4. #44
    Thanks Jazz, SolidWorks helps a lot, I print the template before I drill any hole and cat any shape, use automatic puncher to be precise. Can not wait to the end.

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  6. #45
    Quote Originally Posted by Tom J View Post
    Thanks Jazz, SolidWorks helps a lot, I print the template before I drill any hole and cat any shape, use automatic puncher to be precise. Can not wait to the end.
    Yep I do the same paper and Spray mount it's priceless.!. . I even do the same On cnc machine some times when cutting parts out of large sheet just to be sure they'll fit and not waste material or clash with clamps etc. I then write Tap sizes etc for holes on sheet to remove chances of error etc.
    Last edited by JAZZCNC; 18-12-2015 at 04:56 PM.

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  8. #46
    Quote Originally Posted by Tom J View Post
    Thanks Jazz, SolidWorks helps a lot, I print the template before I drill any hole and cat any shape, use automatic puncher to be precise. Can not wait to the end.
    Quote Originally Posted by JAZZCNC View Post
    Yep I do the same paper and Spray mount it's priceless.!. . I even do the same On CNC machine some times when cutting parts out of large sheet just to be sure they'll fit and not waste material or clash with clamps etc. I then write Tap sizes etc. for holes on sheet to remove chances of error etc.
    Thanks chaps, for a desk based worker like me those are brilliant tips! I hadn't realised the benefits of an automatic puncher and I hadn't thought of printing a template. Now to see if the free version of Sketch-Up can print to scale? And find out what sort of spray mount to use?
    .
    .
    .
    "An automatic center punch is a hand tool used to produce a dimple in a workpiece (for example, a piece of metal). It performs the same function as an ordinary center punch but without the need for a hammer. When pressed against the workpiece, it stores energy in a spring, eventually releasing it as an impulse that drives the punch, producing the dimple. The impulse provided to the point of the punch is quite repeatable, allowing for uniform impressions to be made." https://en.wikipedia.org/wiki/Automatic_center_punch
    Last edited by AndyGuid; 19-12-2015 at 01:28 AM.

  9. #47
    Click image for larger version. 

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    Got problem with proxy sensor in X axis - not too much room to fit.
    Any recommendation for flat body type and 1-2mm range PNP NC like that:

    Click image for larger version. 

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  10. #48
    I find the Round type better has they give more adjustment. Use traveling switch then you'll only need one per axis and it can travel with Z axis facing down there's plenty of room on back of there for a bracket and loads of room on top of gantry for targets.?

  11. #49
    Got some old alu plate - enough for table
    Click image for larger version. 

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    Bed profile was 2.5mm thick before. Now after surface planing is a bit less so I used thread rivet to fit the table top.
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    Click image for larger version. 

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    Click image for larger version. 

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ID:	17585 One Y sensor for Home and Limit (PNP NC)

  12. #50
    Ali plate will make a nice bed. Any reason you didn't put the proxy on the other side where it can't run into the stepper motor?
    Neil...

    Build log...here

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