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  1. #251
    Just a casual observation for anyone looking to re-use these schematics.

    Some, probably not all, but certainly the cheap and nasty BoB that I have in front of me (and I've just re-tested) - which provide a 0-10V output to the spindle, and a 12-24V supply to provide this 10V reference on board... will use this same onboard 10V supply to drive the LED anodes on the opto-isolator inputs (so to switch the input, you connect the coupler's LED's cathodes to ground [via sensors, etc]).

    My point?, for these cheap BoBs, to use the inputs you still need to supply a 12-24V supply, as well as a 5V supply to the BoB.

    Like I said, probably won't apply to all BoBs.
    Last edited by Doddy; 16-06-2018 at 02:38 PM.

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  3. #252
    Thanks everyone for the help and the very helpful info, it is time to make my study now... :-)

  4. #253
    The last two days we had temperature drop and some rain so I went to workshop and lift the gantry and push the x axis rails in the y axis bearings.
    I weighted the gantry out of curiosity and the scale show 32.5 kg with out the spindle and the aluminium plates at the place of mdf,I wonder if the two 4nm motors will be able to move the gantry and cut at acceptable speeds.:-(
    To lift the gantry I made some kind of a crane with some scrap metal beams I had in the shop.
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  5. #254
    The 4Nm motors are STRONG! no need to worry :D


    Skickat från min SM-G955F via Tapatalk

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  7. #255
    I hope or else I will have to rotate the ballscrews with my hands! Haha!!!

  8. #256
    Cut the second base for the x axis motor,the right angle is from the aluminium beams,I cut the length I wanted and then separate the square to two angles,each one for each x axis motor.
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    Last edited by Nickhofen; 22-06-2018 at 05:50 PM.

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  10. #257
    Do you guys prefer to mount the electronics direct at the electronic box with screws and nuts, or first on an mdf and then in the box?

  11. #258
    Myself - a steel plate mounted on stand-offs mounted into the case. That way you can remove the whole assembly to work on.
    Last edited by Doddy; 22-06-2018 at 05:54 PM.

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  13. #259
    Steel plate for ground issues,or because it is more stable?

  14. #260
    It's cheap. Just like me!
    Last edited by Doddy; 22-06-2018 at 06:59 PM.

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