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Thread: Electronics

  1. #91
    RTFM!! 2,500+ Posts allan's Avatar
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    Re: Electronics

    Quote Originally Posted by NeoMatrix View Post
    Fully understand what you're saying.

    I threw two trailer loads of rubbish to the dump? I was sick of looking at machines and parts.
    My workshop is clean of, what I call,"brain clutter".......

    Which copier machines have the Nema 23 steppers? I never really taken much notice?
    Most printers steppers motors wouldn't move the skin off custard.

    I would most likely stay with Win7 and go USB interfacing.
    I can program TurboCAD and hopefully interface to that software.

    I have a CNC machine parts list in my head,ready to sort out and order... soon I hope.....

    Yea the nema 23 motors will work, a B601 got a good couple of motors on it.
    They are weak on the machine because of current limiting set with a voltage reference fed to the stepper driver thru a couple a resistors.
    So you can put a lot more current thru those motors to get them produce so good torque.

    When i first started checking out the operation and how to drive these motors i got a TB6600 driver and used an Arduino to simply send a clock signal.
    The current is set with dip switches on the driver itself and found that the motors you can get of the bigger KM machines works well.
    Beats paying for new motors.

    I used a dualcore running LinuxCNC using a printer port. Works real well.
    So you have the CAD down to create a .DXF vector output. Now just for the CAM. For 2D and 2.5D there should be free to use software out there like FlatCam.
    Whatever

  2. #92
    Senior Tech. 2,500+ Posts NeoMatrix's Avatar
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    Re: Electronics

    Quote Originally Posted by allan View Post
    Yea the nema 23 motors will work, a B601 got a good couple of motors on it.
    They are weak on the machine because of current limiting set with a voltage reference fed to the stepper driver thru a couple a resistors.
    So you can put a lot more current thru those motors to get them produce so good torque.

    When i first started checking out the operation and how to drive these motors i got a TB6600 driver and used an Arduino to simply send a clock signal.
    The current is set with dip switches on the driver itself and found that the motors you can get of the bigger KM machines works well.
    Beats paying for new motors.

    I used a dualcore running LinuxCNC using a printer port. Works real well.
    So you have the CAD down to create a .DXF vector output. Now just for the CAM. For 2D and 2.5D there should be free to use software out there like FlatCam.

    I feel I will go with comerical stepper motors and drivers. I want something to do the job right first time. It will help remove trips an traps out of one area of the design and debug stage.

    I thought about building my own stepper motors. I have half of the materials here, its only a thought at this stage.

    I found my old stepper motor project PCB kits yesterday. It was 2005 I first started this project. I said to the missus wow, how time flys...

    Software is an issue... I would like some shareware first to get a feel for *.DXF conversion to G-code.
    I've software coded my own PDF viewer from the ground up, it converts DXF format, so worst case I could put six months into coding it to handle CNC style G-code.... I'm only interested in 2D code projects for now.

    One step at a time....

    NB. If anyone in Oz is has some copier big stepper motors for trade let me know. I might slide a carton of beer you're way...
    Minimum size Nema 23. Perfer Nema 24,34. I'll require a minimum of five motors.

    Send me a PM.

    tnx...
    Last edited by NeoMatrix; 05-17-2020 at 02:40 AM.
    What if we could count the stars... , what number would you stop at...?"
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  3. #93
    Senior Tech. 2,500+ Posts NeoMatrix's Avatar
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    Re: Electronics

    Re. CAM G-Code Software.
    Allan....
    I know your a Linux user, but you may like to have a look at WinX and Fusion360.

    Fusion360 from AutoDesk is currently free to use for home Hobby CNC users.

    The below video length is long 1:10 min.
    htttps://www.youtube.com/watch?v=pJmb4vD53VA
    YouTube

    Fusion360 does object modelling and CAM tool path G-Code in one software package.

    First impression it looks quite good...

    ------------- Update -----------------
    Have a look at these house render images done with Autodesk 3D modelling.
    You can look around the rendered house by using the mouse...
    (click to the image right until you reach the last image, it goes into walk through mode.)

    htttps://gallery.autodesk.com/a360rendering/projects/63332/contemporary-industrial-functionality-?searched=
    Contemporary industrial functionality.|Autodesk Online Gallery
    Last edited by NeoMatrix; 05-18-2020 at 12:51 PM.
    What if we could count the stars... , what number would you stop at...?"
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  4. #94
    RTFM!! 2,500+ Posts allan's Avatar
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    Re: Electronics

    Yea Fusion360 is real fun. Drawback is it only works when online... Been modeling with it for almost 2 years now. Got a couple of hundred if not more than a 1000 hours on SolidWorks.
    Used the Fusion360 CAM, worked well and was easy enough to setup the correct post-proccesor for LinuxCNC. Made a mini mill out of a 3D printer using a pencil grinder, cutting wood and polycarb parts.
    Mach3/4 is a good control option if you don't want to go the Linux direction and then there is the super cheap GRBL Arduino options.

    Doing those renderings must take a lot of time.

    Real nice project to take on.

    I have been using NanoCAD as a replacement for Autocad. Works just the same for me. You can export .DXF with it.
    https://nanocad.com/products/nanoCAD/






    Whatever

  5. #95
    RTFM!! 2,500+ Posts allan's Avatar
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    Re: Electronics

    Here is some alternatives for Free CAM. Have not tried any of them.
    As long as it generates G-code then it should be good.
    Found that the header and footer on the plain text g-code files sometimes needs to be edited if the post processor does not work the way you want.
    Easy to do.

    https://www.downloadcloud.com/cnc-cam-software.html
    Whatever

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