Dynomotion

Group: DynoMotion Message: 15224 From: cnc_machines Date: 12/12/2017
Subject: Servo Trouble
Attachments :

    Greetings,


    I am having trouble getting a servo up and running. Wanted to see if anyone has use ProNET Chinese servos before?


    http://www.anaheimautomation.com/products/servo/servo-systems-item.php?sID=437&serID=3&pt=i&tID=1106&cID=527


    I have it under power but it doesnt seem to be accepting command signals from the KFlop. I am running open collector according to the example in the KFlop "StepAndDir" file see image 1.


    I am attaching the wiring diagram from the users manual (Picture 2). The thing that is confusing to me is how the ICN-30 and ICN-32 are tied together. Though I dont see how this should matter, seeing as how the KFlop is pulling down.


    Another thing that may be a problem is timing. See image 3 for the drive specs. Could the timing of the KFlop be incompatible? I see the following line of code when the KStep is configured.


    FPGA(STEP_PULSE_LENGTH_ADD) = 63 + 0x80;  // set polarity and pulse length to 4us


    Might I need to do something similar to get the timing right?


    Thanks,


    Scott
    Group: DynoMotion Message: 15225 From: Moray Cuthill Date: 12/12/2017
    Subject: Re: Servo Trouble
    Have you checked the drive is configured to accept the step/dir signals?
    (Given the drives CW/CCW capability, I would use that as it avoids step/dir setup timing problems)

    What confuses me, is why does it show two totally different schematics for the drive internal workings.
    Regardless, pin 34 should have no bearing on how things are working.

    If you are sure things are configured correctly, I'd measure the voltage at the drive (or the KFlop - wherever is easiest to connect a multimeter). Check that you're getting 5V on the high side, that it stays high when the low side is pulled low, and that the low side is being switched. It's easy enough to flip the direction output (just command a move in the opposite direction), but you may need to manually activate the output for the step line (I'm sure Tom will confirm how to do that...)

    Moray

    On Tue, Dec 12, 2017 at 4:53 PM, cnc_machines@... [DynoMotion] <DynoMotion@yahoogroups.com> wrote:
     

    Greetings,


    I am having trouble getting a servo up and running. Wanted to see if anyone has use ProNET Chinese servos before?


    http://www.anaheimautomation. com/products/servo/servo- systems-item.php?sID=437& serID=3&pt=i&tID=1106&cID=527


    I have it under power but it doesnt seem to be accepting command signals from the KFlop. I am running open collector according to the example in the KFlop "StepAndDir" file see image 1.


    I am attaching the wiring diagram from the users manual (Picture 2). The thing that is confusing to me is how the ICN-30 and ICN-32 are tied together. Though I dont see how this should matter, seeing as how the KFlop is pulling down.


    Another thing that may be a problem is timing. See image 3 for the drive specs. Could the timing of the KFlop be incompatible? I see the following line of code when the KStep is configured.


    FPGA(STEP_PULSE_LENGTH_ADD) = 63 + 0x80;  // set polarity and pulse length to 4us


    Might I need to do something similar to get the timing right?


    Thanks,


    Scott
    Group: DynoMotion Message: 15226 From: cnc_machines Date: 12/12/2017
    Subject: Re: Servo Trouble
    Moray,

    Thanks for the reply! yes I made sure it was set up to match modes. As it turns out I was missing an enable signal on the servo, it is working now.

    Scott
    Group: DynoMotion Message: 15227 From: Tapio Larikka Date: 12/12/2017
    Subject: Re: Servo Trouble
    
    Hi Scott,
     
    That looks like my chinese drives, except for the brand. I drive my servos with Kanalog/ voltage speed reference and trickiest
    part at start was the servo tuning.
     
    You said you have the drive under power but have you got succesful trial run as per pages 63&64 of user manual?
    If not then how are the s-on,p-ot&n-ot? As per page 65?
     
    Manual says 1CN-34 is open collector referece power, I suppose for use with single ended step/dir signals, otherwise same
    as 1CN-30&32 but with 2K resistor in front of the optos(?)
     
    Thing that I find very confusing is that image3 first says "....these three types:" then lists 4 possibilities and finally by the open collector example
    it says in big&bold "NOTE: VDC12~24V" so it might be that 5V is not enough
     
    If the trial run works it may be a config issue.
     
    I have one leadshine stepper driver in one of my machines that took me three days to get working, main issue was to get the pulses out of KFlop.
    I'll check my wiring&config tomorrow and post back.
     
    Rgds,
    Tapio