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  1. #1
    Member swat cat's Avatar
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    Default Traub TND 254

    I bought a Traub TND 254 and i need to know if i can use kanalog to drive the servos. (They have resolvers for the feedback)

    So do i use kanalog or get a pair of drivers and just use kflop in step dir mode

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  2. #2
    Member swat cat's Avatar
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    Default Re: Traub TND 254

    Hello Tom,
    My Kflop and Kanalog are on their way to me,so until they arrive i need to resolve some issues:
    -my drivers are constant current(torque),i gues, because they don't have feedback from the tacho. So with kanalog i will controll them with +/-10v . I will need to install an encoder directly on the motor.Sooo.. in configuration should i do something different or it's the same as a constant speed driver board?



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    Member TomKerekes's Avatar
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    Default Re: Traub TND 254

    Hi swat cat,

    my drivers are constant current(torque),i gues, because they don't have feedback from the tacho. So with kanalog i will controll them with +/-10v . I will need to install an encoder directly on the motor.Sooo.. in configuration should i do something different or it's the same as a constant speed driver board?
    Yes if you connect Kanalog DACs to the DU input it would operate in current/torque mode and the tachometer would not be used. There isn't any difference of the configuration between velocity and torque modes only a difference in how the axis is tuned, You might read this wiki article.

    Yes I would replace the resolvers with encoders. The encoder should have differential outputs with the highest resolution that keeps the quadrature count rate below 1 million quadrature counts/second at your highest RPM.

    Regards
    TK http://dynomotion.com


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    Member swat cat's Avatar
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    Default Re: Traub TND 254

    I have a question over the firmware update for the Kflop. When you recover firmware the file is DSPKFLOP.out.
    When updating "new version" it's the same file? DSPKFLOP.OUT?



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  5. #5
    Member TomKerekes's Avatar
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    Default Re: Traub TND 254

    Hi swat cat,

    Yes in both cases the Firmware file is DSPKFLOP.out

    Regards
    TK http://dynomotion.com


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    Member swat cat's Avatar
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    Default Re: Traub TND 254

    I've highjacked two channels from the kanalog to use them as Step/Dir and i used H11L1 optocouplers.but they are ttl (need internal 5v). Any suggestion for a open collector type optos with a high frecvency range <1Mhz?

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    Default Re: Traub TND 254

    Hi swat cat,

    I'm not sure what you are asking. Most Stepper Drives have opto isolated inputs so additional opto isolation isn't necessary.

    Is your issue that you need an additional isolated 5V supply for your circuit to work?

    Regards
    TK http://dynomotion.com


  8. #8
    Member swat cat's Avatar
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    Default Re: Traub TND 254

    Yes, the drivers are opto isolated. But i'm afraid if something were to happen to the driver, i don't want a high voltage to return to the 5v line to kfloop.

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  9. #9
    Member swat cat's Avatar
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    Default Re: Traub TND 254

    ok. so i could use " 74HCT244 " https://www.tme.eu/Document/961c554e...4HC_HCT244.pdf

    It will be ok to convert 3.3v to 5v TTL for the step/dir signals from KFLOP at high speeds? and use a zener diode 5.1v in parallel across the output of the ttl converter IC for protection?

    Last edited by swat cat; 01-29-2020 at 05:01 AM.


  10. #10
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    Default Re: Traub TND 254

    Hi swat cat,

    That would probably work. The only issue I see is the 74HCT244 is only specified with Output currents of +/- 6ma. I don't think you provided specifications for your Stepper Drive. You would need to see if the Drives require more than 6ma.

    The 74HCT244 has protection clamping for currents up to +/-20ma. The Zerner diode may be a good idea as long as it's capacitance is not high.

    Regards
    TK http://dynomotion.com


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    Member swat cat's Avatar
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    Default Re: Traub TND 254



    A funny moment

    The braking circuit failed

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    Member swat cat's Avatar
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    Default Re: Traub TND 254



    Fist beta tests


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