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  1. my collection of electrical bits so far...

  2. #372
    Quote Originally Posted by JoeHarris View Post
    my collection of electrical bits so far...
    Looking good Joe

    Does this help your pm question ?Click image for larger version. 

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    P.s always intended to put hot melt glue over these
    Building a CNC machine to make a better one since 2010 . . .
    MK1 (1st photo), MK2, MK3, MK4

  3. The Following User Says Thank You to routercnc For This Useful Post:


  4. Quote Originally Posted by routercnc View Post
    Looking good Joe

    Does this help your pm question ?Click image for larger version. 

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Views:	109 
Size:	268.9 KB 
ID:	21464

    P.s always intended to put hot melt glue over these
    Thanks, they look like beasty cables! I like the idea of using hot glue as insulation.

    The psu is coming together: tx, caps and rectifier all mounted to some ali plate. Getting 50V out of the rectifier. Not connected the capacitors yet.

  5. #374
    Joe be careful after connecting the Caps because they will be charged and will give nasty surprise if you short the wires.

    Edit: To answer your Alarm wire question from below then no I don't.
    Last edited by JAZZCNC; 23-04-2017 at 08:50 AM.

  6. #375
    Quote Originally Posted by JAZZCNC View Post
    Joe be careful after connecting the Caps because they will be charged and will give nasty surprise if you short the wires.
    Joe, they also take a long time to discharge if nothing is connected to them....

    Sent from my HUAWEI VNS-L31 using Tapatalk
    Last edited by njhussey; 23-04-2017 at 08:06 PM.
    Neil...

    Build log...here

  7. Quote Originally Posted by JAZZCNC View Post
    Joe be careful after connecting the Caps because they will be charged and will give nasty surprise if you short the wires.

    Edit: To answer your Alarm wire question from below then no I don't.
    Quote Originally Posted by njhussey View Post
    Joe, they also take a long time to discharge if nothing is connected to them....

    Sent from my HUAWEI VNS-L31 using Tapatalk
    Thanks guys I'll be careful!

    And good news on the alarm wiring as that would have been a pain.
    Last edited by JoeHarris; 23-04-2017 at 08:59 PM.

  8. Progress on the psu...

  9. I think I've finished the power supply... haven't switched on yet as I want to look it over again with fresh eyes and make sure I haven't done anything dumb! Here she is:

    Power in top right via the D curve mcb which will be din mounted and dc out from the lower terminal block. I have wired a 10k resistor between the dc terminals to drain the caps once powered. Any comments before I turn it on?!

  10. #379
    Quote Originally Posted by JoeHarris View Post
    I think I've finished the power supply... haven't switched on yet as I want to look it over again with fresh eyes and make sure I haven't done anything dumb! Here she is:

    Power in top right via the D curve mcb which will be din mounted and dc out from the lower terminal block. I have wired a 10k resistor between the dc terminals to drain the caps once powered. Any comments before I turn it on?!
    If you got 50V in post 373 at the rectifier then so long as capacitors are correct way around then should work . . . Only one way to find out
    Building a CNC machine to make a better one since 2010 . . .
    MK1 (1st photo), MK2, MK3, MK4

  11. #380
    Only comment (if you have a chance to make any small mods at this stage) is to add a few more sets of terminal contacts for the output, all wired in parallel. This allows you to run separate power feeds to each stepper driver, rather wiring them daisy-chain fashion, and it's easier than trying to stick three big wires in the same terminal. Not sure if it really make a difference in our class of machine but it is generally considered good practice not to share high-power connections between devices, and it's a lot easier if you have multiple terminals available. Might be able to put multiple spade terminals on each of your contacts, though?
    Last edited by Neale; 27-04-2017 at 02:45 PM.

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