Build Thread Saturn 2 4x4 - Nema 23


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Thread: Saturn 2 4x4 - Nema 23

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    Member PLJack's Avatar
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    Default Saturn 2 4x4 - Nema 23

    Hi there.

    This is a continuation of this thread: saturn 2 4x4 questions
    Thought I would start a build thread.

    First off, as others have said, I am very happy with the build of this machine.

    Here is it's current state:

    Those tan cables are temporary. Decided to go with something else. You can see I already pulled the new cable. (Gray)

    Saturn 2 4x4 - Nema 23-img_4432-1-jpg
    Saturn 2 4x4 - Nema 23-img_4433-2-jpg

    And one from before:

    Saturn 2 4x4 - Nema 23-img_4416-3-jpg

    It's stalled a bit waiting on some parts.I forgot how much work went into getting my desktop CNC up and running.

    Here is what I have so far:
    Controller: Smooth stepper
    BOB: 5 Axis Breakout Board
    but will replace with a C25
    Spindle Driver: WJ200-022SF
    Spindle: Typical "four bearing in" 2.2kw. Seems a little better than most.
    Sensor cables: EVC326 and connector
    Motor Cable: MCTC-18-4S-1
    Computer: Lenovo M93p
    And all the related bit's and bobs. No wonder I have no money!

    That M93p is really working out well so far. If you clean up the OS it performs really well. At least so far.
    Small enough to fit in my controller box. Side note, I like my computers that run moving machines to be dedicated.
    In other words it never goes on the LAN or WAN. If you don't go on a network you don't need to install security updates every boot.
    Just the way I like it.

    I've done some tuning but just enough to give me an idea what I have. No sense in doing all that work until everything is sitting in the controller box.
    With that said, even with a gantry I know I need to square, I'm seeing really nice numbers.
    Last test I had a dial indicator set at zero and with gcode I moved the y axis back 400mm, paused, and then come back. Usually the dial hits within a thou or so.
    I can work with those numbers. Just need to squeeze a little juice to get where I need to be.
    Nice work Nate!!

    Now whether it moved 400mm I don't know. Close enough for now. I tuned it with a 4mm move. That part needs work.

    I did make one massive mistake with this project. I decided to document the process on YouTube.
    Just tripped my work and slowed it down by a factor of 4.
    But, too late now. Might was well follow through. Someone might find it useful.

    The controller box is painted and I hope to be done with wiring in a week,

    That's it for now.
    Later.


    Edit: Did the forum just place an ad in my "dial indicator" text? Sneaky ********.

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  2. #2
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    Default Re: Saturn 2 4x4 - Nema 23

    I’ve been moving all the components around in my controller box for a few days now.
    Came to the conclusion that there is not enough room for my VFD.
    I don’t think I want that in my signaling box anyway.

    Is that normal practice? Seems I see that a lot.
    Where are you guys buying those deticated VFD boxes with the disconnect switch?

    Thanks.



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    Moderator difalkner's Avatar
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    Default Re: Saturn 2 4x4 - Nema 23

    I've seen it both ways - inside the enclosure and outside. The Hitachi VFD emits very low noise and that's the reason I had no qualms about putting it inside the enclosure. Of all the builds I've seen it's probably 50/50 on being inside the enclosure.

    David

    David
    Romans 3:23
    Etsy shop opened 12/1/17 - CurlyWoodShop
    www.etsy.com/shop/CurlyWoodShop


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    Default Re: Saturn 2 4x4 - Nema 23

    Industrial routers always have the VFD in the control box. One larger box makes things simpler.

    Gerry

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

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

    JointCAM - CNC Dovetails & Box Joints
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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: Saturn 2 4x4 - Nema 23

    Thanks guys. Good feedback.
    Unfortunately it won’t fit with proper clearance.
    Can’t bring myself to buy one. It’s just a metal box.
    Time to dust off the welder I guess. .



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    Default Re: Saturn 2 4x4 - Nema 23

    When I was getting paid to design and build control panels I never purchased the Hoffman box until I had everything layed out. ,

    Retired Master Electrician, HVAC/R Commercial. FLA Saturn 2 4x4 CNC Router Mach4 Kimber 1911 45ACP


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    Default Re: Saturn 2 4x4 - Nema 23

    Starting to work on the controller box.

    Saturn 2 4x4 - Nema 23-img_4456-s-jpg

    Two questions:

    Fuses.
    I was going to fuse each Gecko drive. But it occurred to me that if one drive pops a fuse I still have the other three energized. That doesn't seem like a good idea.
    Are you fusing so that if one pops they all go down? If so how?

    E-Stop
    I really like having the ability to hit the E-Stop and kill all power to the steppers. Without taking down the controller. Especially if I need to quickly put my fingers near the mechanical drive system. That way Mach3 does not start *****ing about the controller. I see most wire the E-Stop to the AC feeding the DC power supply to the box.
    Does in make sense to have two E-stops? One for stepper DC and one for box AC?

    Thanks.



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    Default Re: Saturn 2 4x4 - Nema 23

    Right or wrong my E-stops drop the relays for control but leave power to the boards so everything stops if the E-stop is hit. When I reset the E-stops the power is restored to the relays and control given back to Mach4 for restarting the cut (at least I think that's how I did it - it's been a while). On the door of the enclosure I have a main STOP button and that kills power to both the 120v and 240v relays powering the entire enclosure. I use that button to turn the machine off.

    David

    David
    Romans 3:23
    Etsy shop opened 12/1/17 - CurlyWoodShop
    www.etsy.com/shop/CurlyWoodShop


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    Default Re: Saturn 2 4x4 - Nema 23

    Are you fusing so that if one pops they all go down? If so how?
    That's not what fuses are for. A fuse is to protect wiring from burning up, nothing more.

    Steppers will stop faster on an Estop if they remain powered, as they will stop the motors when the step signals stop.

    Or, rather than cutting power to the drives, just have the Estop disable the drives.

    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)


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    Default Re: Saturn 2 4x4 - Nema 23

    Quote Originally Posted by ger21 View Post
    Steppers will stop faster on an Estop if they remain powered
    Funny, I just stumbled upon that 30 minutes ago while wiring.

    Saturn 2 4x4 - Nema 23-img_4457-jpg

    I was wondering how to wire up the disable connection on the Gecko drive.
    E-Stop. Got it. Seems it goes to power positive with a resistor and the e-stop in in between.
    Examples I've seen have that power coming from the stepper power supply. Instead of a 5v logic?
    I'll need to look into that.

    Thanks.



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    Default Re: Saturn 2 4x4 - Nema 23

    So, this is fun. I completed the 120v wiring. Yesterday morning powered it up to do a bench test before placing everything in the controller box. Even though I did “double check” everything I had the power rreversed for the ess board.
    Yep! That little mistake cost me $200 and added a week to the process while I wait for a new ess to arrive.

    I guess the lesson there is don’t play with electricity before 9:00am. .



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    Default Saturn 2 4x4 - Nema 23 - Proximity sensor question

    New ESS arrived and I've started to wrap up the wiring.

    Saturn 2 4x4 - Nema 23-box1-jpg

    Motors are finished and the machine is moving again!.
    Trying to work our the proximity sensor before I hard wire all four.

    Model: NBN8-12GM50-E0-V1 NPN NO (From FLA)

    From what I am reading:
    Brown is power. In this case 12v.
    Blue is ground.
    Black is signal.

    The black needs a pull up resistor connected to positive.
    I have a C25 BOB. I've been experimenting with a pull up connected to the 5V on the C25.
    I had to drop all the way down to 100oms in order for the signal to register. Seems to me that value should be higher. I was expecting it would work with a 4.7K resistor.

    Should my pull up be coming from the sensor 12v source?
    It's working with the 100ohm->5V and the resistor is not getting warm when sinking to positive but I would like some advice before I commit to wiring.

    Thanks.



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