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  1. #191
    Quote Originally Posted by JAZZCNC View Post
    Cheap Bob's are like playing Russian roulette with a nearly full magazine.!! . . . . Long term they are not worth the hassle because at some point they will fail or cause issues along the way which will appear like coming from other areas of the machine. Before I started with CNC I had full head of hair and now I Dazzle planes on sunny day and I blame all on of cheap BOB's.!!!
    I work at Air Force so I have enough help from my job to grow a bald! Lol!!!
    Any suggestions about a proper bob that I can make it work like a Swiss clock with the uc300 and all that at an affordable price...ops!

  2. #192
    Finish the power supply, thanks everyone for the help.
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    Last edited by Nickhofen; 14-07-2018 at 07:44 AM.

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  4. #193
    Clive S's Avatar
    Lives in Marple Stockport, United Kingdom. Last Activity: 10 Hours Ago Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 9-10 years. Has a total post count of 3,333. Received thanks 618 times, giving thanks to others 78 times. Made a monetary donation to the upkeep of the community. Is a beta tester for Machinists Network features.
    Brill

    It is good practise to not to daisy chain the 70V across each drive ie. use separate power leads from each drive to a common block and then connect the PS to the block. This ensures you are not getting a volt drop to each drive from the first one.
    ..Clive
    The more you know, The better you know, How little you know

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  6. #194
    Thanks Clive, I will keep this in mind!!!

  7. #195
    That's super tidy, I see you went DC in the end. What voltage output transformer is it? 50v?

    I wired the transformer to a 13 amp light style switch and then my VFD and water pump to another switch and both of them are wired from the emergency stop.

    This way I can easily turn the transformer on/off and if the vfd is powered the water pump is on. I have both switches and the emergency stop at the front of the machine for easy access in a row.

    If I hit the emergency stop it kills power to both the steppers and the vfd, I still have to work out how to get it to trigger an estop on the pc but it's good enough for me at the moment.
    Last edited by Desertboy; 15-04-2018 at 01:36 PM.
    http://www.mycncuk.com/threads/10880...60cm-work-area My first CNC build WIP 120cm*80cm

    If you didn't buy it from China the company you bought it from did ;)

  8. #196
    Quote Originally Posted by Desertboy View Post
    I still have to work out how to get it to trigger an estop on the pc but it's good enough for me at the moment.
    Just use a relay with a 230VAC coil.

  9. #197
    Thank you both for the idea, any wiring diagram will be helpful.
    Desertboy you are right it is a 50V output transformer.
    Click image for larger version. 

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  10. #198
    Nice progress!
    Does it feel good to move forwards? :D

    Skickat från min SM-G955F via Tapatalk

  11. #199
    Quote Originally Posted by Nr1madman View Post
    Does it feel good to move forwards? :D
    In my case it would be good to get back to where I started - spent the afternoon reassembling my lathe and getting the safety switches operating reliably. Then reinstalled the VFD (when I took it out months ago to fix the broken mounting lugs, I photographed the connections and labelled them as I disconnected each one). Now I am getting a code that says low DC bus. I sense a new thread coming if I can't sort it easily.

  12. #200
    Quote Originally Posted by Nr1madman View Post
    Nice progress!
    Does it feel good to move forwards? :D

    Skickat från min SM-G955F via Tapatalk
    I feel that I have so much to do that this looks like a baby step....thanks for the motivation!

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