Building 3 axis STEP/DIR to +/- 10V Analog servo controller


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Thread: Building 3 axis STEP/DIR to +/- 10V Analog servo controller

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    Default Building 3 axis STEP/DIR to +/- 10V Analog servo controller

    Hello community!

    I recently acquired Gene Machines OmniGrid 100 microarrayer similar to this http://www.cnczone.com/forums/diy-cn...ml#post1048296


    I got ball screw Parker linear stages with hall home and limit switches, gantry and control module. Control module has power supplies and Parker OEM670T drives, taking +/- 10V.

    The system was missing the computer based servo controller.
    I was unable to find anything affordably to buy. The cheapest option is CSMIO/IP-A| 6-axis Motion Controller, which cost 600 euros. I bought the whole machine for $250!

    I decided to build my own controller.
    I initially created Atmega2560 based 3 axis servo controller and successfully ran it as 3D printer and LinuxCNC router, but it couldn't handle 1000 steps/rot encoders at high speeds.

    I am currently working on STM32F4 based 3 axis servo controller, and thinking about making it into an inexpensive product ~$100 for 3 axis controller.
    The goal is to make it standalone, with LCD screen, button control, and PID autotune.

    I would like to get some feedback from community about this idea. Trying to create a simple minimum viable product.
    It would be great if I can find somebody at San Antonio, TX who will be willing to test it for CNC retrofit or custom project.

    Similar Threads:


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    Default Re: Building 3 axis STEP/DIR to +/- 10V Analog servo controller

    Hello.... this sounds intriguing.... how far are you along with this?


    Sent from my iPad using Tapatalk



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    Default Re: Building 3 axis STEP/DIR to +/- 10V Analog servo controller

    Quote Originally Posted by padstar View Post
    Hello.... this sounds intriguing.... how far are you along with this?


    Sent from my iPad using Tapatalk
    Hello,

    The PID controller is working on all 3 axis. Currently working on PWM output filtering and optoisolation.
    I decided to switch to smaller monochrome OLED screen, since large color LCD screen take too much time to output info.
    Next step, would be to implement an PID autotune algorithm.

    I will update here. This is my third job, so things are not moving as fast as I would like to.



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Building 3 axis STEP/DIR to +/- 10V Analog servo controller

Building 3 axis STEP/DIR to +/- 10V Analog servo controller