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Thread: Planning New Machine Build - Many Questions

  1. #37
    Community Moderator ger21's Avatar
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    Default Re: Planning New Machine Build - Many Questions

    I went with the DYN4 over the DYN2 to avoid even needing the power supply.

    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

    JointCAM - CNC Dovetails & Box Joints
    http://www.g-forcecnc.com/jointcam.html

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)


  2. #38
    Member mkelcy's Avatar
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    Default Re: Planning New Machine Build - Many Questions

    DMM got back to me and said the 4 power supplies were a typo; that one 1KW power supply should be ample.



  3. #39
    Member mkelcy's Avatar
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    Default Re: Planning New Machine Build - Many Questions

    So, I'm trying to figure out my controller build. Here's what I've got:

    Enclosure (I'll size it after I see what I'm putting into it)
    Standoffs for boards
    Wire guides
    Din strips
    Breaker for AC power
    115VAC Power switch (115VAC to Acorn PS, 56VDC PS, relays for external power needs) – should 115VAC be run through a distribution terminal?
    Acorn power supply (24VDC/5VDC) – 24VDC to Acorn, 5VDC to parallel port breakout board
    E-Stop operated contactor on 56VDC PS power - Needed?
    56V power supply – + and - fused to distribution terminal then to Dyn2 drivers
    Breakers/Fuses for DC power to individual drives - needed?
    Dyn2 drivers
    Terminal blocks for limit switches/common/56VDC/5VDC/ZRI/Alarms
    Acorn
    Parallel port breakout board for wiring Acorn to drives
    Acorn relay board
    Connectors for motor power cables, encoder cables, 115 VAC power in, 115VAC Relay power out, VFD control cable, VFD speed signal cable (Can these 6 signals be in one shielded cable), 24VDC to Estop controlled 220VAC Contactor in VFD box, Ethernet cable to PC, E-stop, Home switches

    I'd put all the AC stuff at one end of the box, the drivers in the middle and the Acorn at the bottom.

    Am I forgetting anything?

    I'm not sure how much circuit protection is needed/advisable - the AC power circuit is on a breaker already, should I have a breaker in the box? DMM recommends fusing the DC power before it gets to the Dyn2 drives. Should I fuse both before the VDC gets to a distribution terminal and then fuse the feed to the individual drives, just one or the other?

    I'm also at a loss on how to size the AC and DC circuit protection and the motor power connectors. At full power, each of the motors theoretically draw a little over 13 amps, but I expect that they'll spend precious little time at full power. Do I size all the circuit protection for full power, or something less? Similarly, do I size the bulkhead cable connectors for the motor drives for 13 amps (pretty hard to find) or would 4 to 5 amp rated connectors be acceptable.

    Finally, this is all less CNCRP related, is there a better forum for these electrical questions?



  4. #40
    Community Moderator ger21's Avatar
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    Default Re: Planning New Machine Build - Many Questions

    Ask DMM about their requirements.

    As for your Acorn questions, I highly suggest you joint Centroid's Acorn forum and ask their. That's by far the best place to get good info on the Acorn.

    - - - Updated - - -

    Am I forgetting anything?
    Ask 10 different people, and they'll build their systems 10 different ways.

    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

    JointCAM - CNC Dovetails & Box Joints
    http://www.g-forcecnc.com/jointcam.html

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)


  5. #41
    Member Ntl's Avatar
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    Default Re: Planning New Machine Build - Many Questions

    Quote Originally Posted by ger21 View Post
    Ask DMM about their requirements.

    As for your Acorn questions, I highly suggest you joint Centroid's Acorn forum and ask their. That's by far the best place to get good info on the Acorn.

    - - - Updated - - -



    Ask 10 different people, and they'll build their systems 10 different ways.
    Agreed, join the Centroid forum you will get answers to all your questions and be able to see a bunch of recent builds using DMM hardware.

    Dan



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Planning New Machine Build - Many Questions

Planning New Machine Build - Many Questions