Can I get away with this Nema 23 direct to Duet 2 Wifi



  • I reviewed the documentation and it looks like it might squeak by

    I currently have this in stock;

    Can I hook this up to the duet 2 directly
    Nema 23 Stepper Motor 3.0 A 1.3 Nm 184 oz.in 76mm Body w/ 1m Cable for 3D Printer/CNC
    Or would I use an interface board of some kind?

    Alternately the following stepper might be more appropriate for a direct connect?
    1 x Nema 23 Stepper Motor - 2.5 A, 1.3 N.m, 184 oz.in

    If the board supports up to 2.4amps could either work if I use M906 and set the motor current below 2amps. M906 X2000

    I am deciding whether or not I want to use a screw or belts on the X axis; or if I want a single large motor or two Nema 17s



  • Sure, it won't hurt anything if you keep the current set to about 80% of the driver chip limit.

    The real question is: Will that motor have enough torque and speed for your application? There are ways to approximate this... but if you have all the stuff in your hands, just try it.


  • Moderator

    You can use the full 2.4a if you want, just make sure you have the cooling in place.



  • Thanks for the response. I was going to build a CNC but instead I am going to build another large 3d printer. The printer will have 1200mm x, 300mm y and 150mm z.. I am not quite sure if I want to use a belt for the X or a ball screw.


  • Moderator

    @wepollock said in Can I get away with this Nema 23 direct to Duet 2 Wifi:

    not quite sure if I want to use a belt for the X or a ball screw.

    If it's going to be a printer, go with belt. Even on the long axis if you get good quality belts the stretch won't be an issue. The ball screw has so much weight and rotational inertia that it makes for a very slow printer axis.



  • @Phaedrux

    If I go with a belt I am going to have to have the stepper motor ride the x axis gantry; have a the belt lay flat and draw up into the stepper motor around idlers. If I go with a ball screw I will have a more direct way to drive. I might be able to have the belt loop around so flat ends oppose.

    I will use a very big nozzle and a piezio leveling system.

    The last printer I built was a very big delta with 400mm printing radius. I had large plates machined. The first task of the build was to construct carbon fiber arms.

    I am going with a Cartesian so I can do 1000mm long by 400mm wide prints. It looks like a much easier build. The real task is going to be managing the weight on the gantry.


  • Moderator

    Have you considered core xy?



  • @Phaedrux
    I took a pass on the E3d corexy because the build volume was limited and I don't have a use case for tool changing.
    I am going to have a tiny amount of Z, a large nozzle and a massive build volume xy

    In my case It might be more effective to lift the tool than it would be to lift the platform.

    Mostly the design is driven by some of the parts I had on hand for a CNC build. I was going to build a CNC but decided to buy a Shapeoko. I have done a few good projects with the Shapeoko (designed under cabinet lights and tool storage shelves) but I am using 3d printers more.

    Have sequential prints (one after another) or even think about concurrent prints. (two at a time)

    For me the build is a month or two of fun. The printer will have three times the xy build volume as my very big delta;

    https://www.thingiverse.com/thing:3416307


  • Moderator

    CoreXY is just the kinematic type. The belt arrangement. Useful for tool changers, yes, but not just.

    corexy.com


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