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CNC servo control

antiobsolescenttoymaker

can anyone point me in the right direction?

I recently picked up a nice biotech xyz table.

I've confirmed that the components themselves work but want to convert it into a CNC router / 3D printer.

The table uses med size DC servo motors for all movement and has the original PSU.

I have looked all over and have yet to find an arduino based solution for a servo CNC

image

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  • Your biggest problem is you dont appear to have a suitable "Servo Controller", many of the new "Servo Motors" have a controller built in and will accept step and direction signals in the same way as a stepper controller but way better precision and more constant torque across the speed range

     

    The cost for you / or time (If your expertise allows for it) will be in writing software to replace the servo closed loop and integrate into a 3D printer control board like RepRap 1.4 or any other for that matter.99% of the cost effective ones expect to output step and direction pulses and or contain the stepper drivers on board.

     

    I think your best bet as you have what appears to be an excelent hardware platform is to replace those servos with nema 11 or 17 steppers. The drivers you're quoting are for steppers.

     

    You dont show enough detail on the small PCB to the left of the motor, is it possible this is a servo driver with integrated feedback control?, what is the chip on their ??

     

    please show a fuller view of the mechanical platform and any other parts you may have for this ?

     

    I am in the process of producing a series of videos specifically about creating a home built motion control system and this will be focused on all the modules needed to create a complete system

    This includes completing a CNC Router, Upgrading the controller on another CNC Router and building 2 3D printers from scratch (One CoreXY and one like a Prusa I3 MKII) , including design ,hardware and electronics needs.

     

    You can find the videos here

    https://www.youtube.com/watch?v=40Qc8ZUZOJI

    https://www.youtube.com/watch?v=XPqOh4Yi3WU

     

    I have not posted the videos directly to Element14 as their sponsored by a different vendor and I dont want to upset people, but as far as helping fellow makers, it all about that image

     

    I also have a bunch of videos on the making and upgrading of my first CNC Router (1500mm x 1500mm) here :- The Bull Dog, A RoverCNC OX based 1500mm x 1500mm CNC - Tutorial build | OpenBuilds

     

    All the links are relevant to building motion control systems, hope you find them useful

  • in reply to Robert Peter Oakes

    peter I saw your videos on this gigantic building many times and I really love them. Well done, clear and you have done a very good job. Every time I see them I have a question. Why in a so well done structure good and precise the shaft is just something like a Dremel o Proxxon or similar? Is not the case to include a motor controlled spindle? I have a 30x30 cm mill machine but the better part is the water cooled spindle 800-300 rpm. Or I am wrong respect the kind of material that should be worked ?

     

    Enrico

  • in reply to balearicdynamics

    Well I do have way better than a dremel, I have a Bosch Colt 1HP 30,000 RPM woodworking router, still not as good as a purpose designed spindle with a proper ERxx collet etc but to keep things simple...

    I have no budget to buy a nice spindle, all except the Colt was donated by my sponsors to make the videos, No Payment aside from the gift of the parts and I dont get paid to create any of my content so I rely heavily on generous sponsors but none so far have sent me a spindle or even carry one as a product surprisingly... maybe soon image, I do have a 3.5W laser that will be added from Banggood and I am looking forward to integrating that image/

    and I get very little from Google Adsense, barely enough to pay for the internet access.

    I hope that clarifies your question

  • in reply to Robert Peter Oakes

    Hello Peter,

    all is clear. Me too I am veeeery sensible to this kind of problems (i.e. $$$) but I thought it was some different reason. My mill machine - at the moment in standby due the new lab reset - has a spindle like what I have described but I got it as partial development support from a customer years ago. And I was astonished discovering that it was about 400$ to replace one image

     

    For some reason I was thinking there was a more technical reason.


    Enrico

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  • in reply to Robert Peter Oakes

    Hello Peter,

    all is clear. Me too I am veeeery sensible to this kind of problems (i.e. $$$) but I thought it was some different reason. My mill machine - at the moment in standby due the new lab reset - has a spindle like what I have described but I got it as partial development support from a customer years ago. And I was astonished discovering that it was about 400$ to replace one image

     

    For some reason I was thinking there was a more technical reason.


    Enrico

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