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  1. #71
    Volts make prizes.!!! . . . . Nice looking machine Tom and very well made . .

  2. The Following User Says Thank You to JAZZCNC For This Useful Post:


  3. #72
    Tom it looks like you could increase the acel settings. Have you thought about putting a W.C spindle on it?

    Nice machine.
    ..Clive
    The more you know, The better you know, How little you know

  4. #73
    Nice build Tom
    Neil...

    Build log...here

  5. The Following User Says Thank You to njhussey For This Useful Post:


  6. #74
    Much better now.

    Looking at your control box picture in post#66 the stepper motor cables are very close to the toroid - seems to run OK without load and without spindle running but one to watch if it glitches ?
    Last edited by routercnc; 27-06-2016 at 12:24 PM.
    Building a CNC machine to make a better one since 2010 . . .
    MK1 (1st photo), MK2, MK3, MK4

  7. #75
    Quote Originally Posted by Clive S View Post
    Tom it looks like you could increase the acel settings. Have you thought about putting a W.C spindle on it?

    Nice machine.
    Waiting for 48V PSU and will try to bring voltage to 45V and tune again.
    I had one 1.5 Kw fi 60mm, but was leaking so had to send it back.
    2.2kW is way too big.
    See on design:
    Click image for larger version. 

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  8. #76
    Quote Originally Posted by routercnc View Post
    Much better now.

    Looking at your control box picture in post#66 the stepper motor cables are very close to the toroid - seems to run OK without load and without spindle running but one to watch if it glitches ?
    Picture 66 shows different control box - 7A biger machine and was unfinished - cable runs on other side and all are screened and grounded to the plate. Inverter is outside with built in emf.
    Last edited by Tom J; 28-06-2016 at 08:21 PM.

  9. #77
    Quote Originally Posted by Tom J View Post
    Waiting for 48V PSU and will try to bring voltage to 45V and tune again.
    Be careful Tom because these drives don't tolerate much over 52V Spike so if your Input voltage varies very easy to peak above 50V.
    Certainly don't go above 45V.

  10. #78
    Quote Originally Posted by JAZZCNC View Post
    Be careful Tom because these drives don't tolerate much over 52V Spike so if your Input voltage varies very easy to peak above 50V.
    Certainly don't go above 45V.
    Great stuff.
    Just tested:
    http://www.ebay.co.uk/itm/AC-DC-5-12...-/351624473683

    I can adjust voltage from 32-57V DC and there is no spike on start up.
    still have to find sweet spot below 50V taking emf into account.

  11. #79
    Ok thought you was talking toroidal transformer. Personaly Not fan of these type of supplys because they can Clamp and lock up if the back Emf gets high. That said If your not flying about with fast direction changes and on light-ish machine probably not have any issues.?

  12. #80
    I only temporarily hook up toroidal trafo , this gave me only 40V (2x30V AC).
    My control box is very small same like machine so end up with Chinese power supply - not so big fun of them, but hey ho.

    Jazz what do you mean by clamp and lock up when EMF gets high?

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