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Thread: Dmm Dyn4 pmdx126 ess control build

  1. #13
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    Default Re: Dmm Dyn4 pmdx126 ess control build

    Got a build thread somewhere?



  2. #14
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    Default Re: Dmm Dyn4 pmdx126 ess control build

    Dmm Dyn4 pmdx126 ess control build-20170316_092528-jpgThis is for those wiring 240v to the drives. I have supplied 240v to the main which is black and red and control power the two blue each wire has 120v to ground there is no nuetral being used if you do that you will fry/cook it!!!!!!
    R&S 240v
    L1&L2 240v
    The only ground is on the chassis screw below the screw for the motor ground.
    Follow the print if you dont have 3 phase then it'll just be one less wire to the main power.
    If the wire in the schematic doesnt have the earth/ground PE symbol then it is power.
    The print represents 3 phase 240v power being used. That means measuring across any two should have 240v or maybe 220v depends on what your power company supplies you.



  3. #15
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    Default Re: Dmm Dyn4 pmdx126 ess control build

    Do you have separate contactors for each drive, or one 32 amp contactor for all four? The manual says to use a contactor rated at 30 amps for each drive.
    I'm currently laying out a control box using four 400watt servos, and was wondering what size contactor to use. The 400w drives only draw 3.5amps each.

    Gerry

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


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    Default Re: Dmm Dyn4 pmdx126 ess control build

    I have a 32amp contactor and breaker for the 3 750w drives and a 18amp contactor and 20amp breaker for the spindle drive which is 1.8kw all running 240v for main and control power.
    But depends on if your going to use 120v or 240v
    If 240v an 18amp contactor would be fine for 3 400w drives. I would try to get the breaker a little closer like 15amp



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    Default Re: Dmm Dyn4 pmdx126 ess control build

    LtDan,

    I'm building up a CNC router and I have 4 DMM servos (dyn4) - so thank you for the very timely post. I've yet to purchase a motion controller - I've been considering the PMDX-126/ESS or PMDX-424 (all in one) for use with mach 4. Since yours is a recent build - I was wondering if you had a compelling reason <not> to use something like the 424? Features? Speed? After a bit of research one difference that I could see was that the 424 and similar boards from PMDX max out at 100 khz step/dir whereas the ESS goes up to 4 mhz. I don't know if that limitation affects me or not.

    This is a first-time build (for me), the router is a cnccrouterparts 12x6, the application is mostly light materials - maybe a very occasional aluminum part. I went with servos (and dmm) because I believed that my cutting speeds will be relatively high... routing wing mold surfaces, foam cores etc.

    Thanks in advance for any thoughts, and thanks for showing how a control box should be laid out...

    T



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    Default Re: Dmm Dyn4 pmdx126 ess control build

    Yes it does! I run my ess at 2mkz on each axis, this is for accuracy .0001 And the add on speed controller for a second spindle that I mount on the table. My main spindle on the Z-axis is run like an axis/spindle.



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    Default Re: Dmm Dyn4 pmdx126 ess control build

    Dan, regarding contactor and estop wiring. I will be wiring 240 single phase. That is: contactor to DMM Drive (R and S) 240 single phase as with your red and black. Contactor to DMM logic (L1&L2) 240 single phase with 1Amp fuse and mode filter as with your blue wires. But you indicated that your contactor <coils> run 120V. So the questions become:

    1. Are you running single phase 120V (using black and neutral for example) through the contactor coils and an EStop?
    2. (or) Do you have a logic level estop chain connected to a relay to drive the 120V contactor coils?
    3. Are you using the PMDX-126 Estop input (J13 Pin 4 to GND)?
    4. Do you have a provision such that the PMDX-126 can cause the connector to break and then shutdown DMM drives (software fault / software estop).

    Todd Wetzel



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    Default Re: Dmm Dyn4 pmdx126 ess control build

    Yes Todd you are correct on the main and logic power.
    Yes 120v for the coils just make sure you have a dedicated nuetral (white) for this all the way to your main panel in which is bonded with the ground.
    yes this 120v is controlled by a 24v relay controlled by logic in which I use 2x dpdt...latch and unlatch relays and coils. the contactors have auxillary contacts for this. I tie the estop circuit from the pmdx to and the drive fault output circuit. the contactor coils are also controlled by 2 momentary push buttons on the other relay. Buttons (red n green) nc and the other is no this is for drive on off power that way they do not just power up when you clear your estop in the software which closes on your bob output. But even when the green button has been pressed to power them up the estop output fom the bob can interrupt the coil and kill power. Full proof safety circuit. All of my HMI button controls are 24v to keep the high voltage contained in the cabinet. Another way to do this setup is with a etsop safety relay which usually provides plenty of contacts no nc. find em cheap on ebay.I used a couple phoenix contact din relays.
    Hope that explains
    Dan

    Last edited by LtDan; 04-07-2017 at 09:34 AM.


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    Default Re: Dmm Dyn4 pmdx126 ess control build

    Thanks Dan, that helps. Can you tell me if you used the PMDX126 dedicated e-stop relay in your system (relay K2 I think)? Or did you skip that relay entirely and configure mach(3/4) to use a different logic level pinout? If you are wondering why I ask it is because I originally assumed I was going to wire things up like this: (image sourced from the PMDX-126 app notes).



    In the above image it appears that the contactor coil must match the AC voltage sent to the PMDX... From my point of view the only way to use both a 120V contactor coil and the built in estop relay would be to power both the pmdx board and the contactor from the same 120V branch. I could be wrong about this of course.

    I did end up getting the PMDX126/ESS to run the sytem... I'll be testing all of this in a few weeks.

    Again thanks for the info,

    Todd

    Attached Thumbnails Attached Thumbnails Dmm Dyn4 pmdx126 ess control build-pmdx_estop-jpg  


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    Default Re: Dmm Dyn4 pmdx126 ess control build

    All I used was the j13 connections gnd and estop which I think preconfigured is port 1 pin 10 in software. But you could use that diagram I did not because I wanted all exterior power to be 24vdc for safety. I powered all components with 240v that would take it. pmdx board, both power supplies, drives.
    Sorry forgot what I did. I did use pmdx k2 relay but ran 24vdc acrossed it to control my relay that has the 120v running through it.
    I would have preferred to just get 24vdc coils on the contactors but that was after I decided to use lower voltage.

    Last edited by LtDan; 04-07-2017 at 08:44 PM.


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Dmm Dyn4 pmdx126 ess control build
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