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      1. Build Progress:
        • Build in Progress...
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      I got:
      2 Nema23 1.26Nm steppermotors for the y-axis,(2Amps at 3.6Volts)
      1 Nema23 1.26Nm steppermotor for the z-axis(2Amps at 3.6Volts)
      1 Nema23 3Nm(435oz-in) stepper for the x-axis(4.2Amps at 3.78Volts)
      Im driving the steppers with 4 TB6600 Stepperdrivers (one for each motor) controlled by an Arduino Uno with Grbl and Universal Gcode sender on my laptop.

      There will be 2 SFU1605 ballscrews for the Y-axis, 1 SFU1605 ballscrew for the X-axis and one M16x2 threaded rod for the Z-axis.

      Let's begin ;)

      (10/13/2018) I just received the first batch of 2.3 cm plywood and started building. I started with the wasteboard and drilled all holes into it. This wastboard will not be "wasted", there will be a 1cm-2cm thick MDF board on top of it.
      IMG_20181014_173918[1].jpg

      (10/28/2018)
      20181024_070419.jpg
      And this is the real life picture

      (12/2/2018)
      I have now assembled the linear rails on the Z-axis and they are moving pretty freely and smooth. 20181203_204413.jpg 20181203_204424.jpg 20181203_204447.jpg

      (first half 2019)
      I have now finished the Z-axis. It weighs about 7.5 Kg (16 Pounds) and a speed around 400mm/min (15.8"/min) without loosing to much torque.
      IMG_20190812_212820.jpg
      (the backlash is removed by tilting the nuts in different directions) IMG_20190812_212750.jpg

      I have tried the same technique for the Y-axis which didn't worked that well because the resistance and backlash was way to high than what I considered good so I bought some cheap SFU1605 ballscrews from China as listed above.

      (8/9/2019)
      In the past few days I assembled the first ballscrew on the Y-axis. The alignment was pretty good thus the ballscrew could turn with very low resistance and no backlash(by eye). The only problem is the way i have to mount the stepper to the frame of the CNC because the stepper is so far away from the frame of the CNC and the space is very limited. IMG_20190812_213228.jpg
      Right now I just got one of the supports of the stepper in place but that one alone would be probably enough. With this setup I could achieve a feedrate of 2000mm/min (78.8"/min) with no load (so probably just for rapids) and no obvious signs of the stepper loosing steps.

      (8/12/2019)
      In the time between the last post and today I have done a lot of testing with the TB6600... I found out that at some feedrates and no load I am loosing steps.(like <300mm/min; >1500mm/min and at some speeds in between). With load (ca. 5-15N) I am sometimes loosing steps worth of up to 0.15mm(0.0059") or even more. I also tried different microstepping settings like 200(no microstepping), 400A(2 times) and 800(4 times) steps/rev and found out that at I am loosing the most steps without microstepping (which could be just random).

      There is an unfinished Fusion 360 file below which could be just mirrored to complete (it isn't cantilevered)(also the steppers, leadscrews of the X- and Y-axis and all the screws are missing)
      A360

      Attached Files:

      1. Special Notes

        DON'T BUILD LIKE THIS !
        IT WILL HURT YOU THE WHOLE TIME YOU ARE THINKING ABOUT IT! :)
      Vasileios, MaryD and GeoffH like this.
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  • Build Details

    Build License:
    • CC - Attribution NonCommercial - Share Alike - CC BY NC SA

    Reason for this Build

    I build this to get an insight to the world of machining.
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