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Thread: Anyone Using Teknic SST-1500 Servo Control?

  1. #25
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    Default still out ther victor?

    Hello?



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    The best way is to find the datasheet on the motors for the inductance. If you can't find it, there is a rough cut formula for determining it that I can't seem to find yet. I'll have a look. I believe you can get started with those gains at zero. There's also a third party motor setup doc I'll try to track down for you.
    Are you using SST1500-UCX or RCX?

    Mike Visit my projects blog at: http://mikeeverman.com/
    http://www.bell-evermannews.com/ http://www.bell-everman.com


  3. #27
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    Default Drives

    They are the AVS version sold by Bearing Engineers so im not sure.



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    Quote Originally Posted by Mike Everman View Post
    The best way is to find the datasheet on the motors for the inductance. If you can't find it, there is a rough cut formula for determining it that I can't seem to find yet. I'll have a look. I believe you can get started with those gains at zero. There's also a third party motor setup doc I'll try to track down for you.
    teknic kindly sent me the document.

    If I rotate the motor while tuning there seems to be two modes that will produce different tuning results. This is just a bare motor, most likely of poor quality. I'll try again maybe with a better motor.

    Attached Thumbnails Attached Thumbnails -tuning-torque-loops-pdf  


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    Quote Originally Posted by victors View Post
    Hi Carl,
    There are several things to consider. 1 - Tuning the servos, 2 - homing the axis, 3 - squaring the machine and 4 (your question) - running the axis.

    Some of this depends on your controller and some on wiring. To answer your question first, the drives should be wired in parallel to the controller so each drive receives the same step and direction signal at the same time. If your mechanics have the motors spinning in opposite directions you must reverse the direction input somewhere along the way, either in the drive with the reverse function, in the controller or in the encoder wiring. If your controller is capable you can actually use them as 2 separte axes (like X1 & X2) and tie them together in the controller.

    Homing the axes, setting limit switches and squaring the machine will be more challanging. Once the machine is tuned and square you're all set, unless you lose power to the encoders, then the machine must be re-squared and homed. Since you'll likely tune the axis and square the machine with 2 computers this works OK when you build it, but not if you ship it and need to re-square it again at set-up.

    All this can be done with 1 computer if you create a ring for the drives, but you'll still need to connect them to a scope for the tuning. They could possibly be connected to one hard scope on 2 different channels to allow tuning both at one time. When tuning them with 1 PC you'll have to make very small changes to the tuing files as you go back and forth. Torque will give you an idea which drive is working harder.

    There is a ton more stuff we could cover, but some of it depends on how you plan to use the machine, how your controller works and if you're selling the machine to someone else.

    Let me know how else I can help.
    Victor
    Hopefully there are still people interested in this thread...

    I've just acquired three Teknic sst-1500 drives with Kollmorgen motors.
    Everything works fine until I send step and direction commands (Mach3)to the drive. There is a thump from the motor and the the drive shuts down.
    Using USDigital encoder. Anybody else experiencing similar problems ?

    Tony
    The motor reacts with a thump and the drive shuts down



  6. #30
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    Starcat,
    I can help if I know more...
    What do you mean by works fine until you send commands?
    do you know the amps have been tuned to the motors?
    do they lock up when power is on? does the green light flash fast when power is on?
    do you have a programming cable for it and quickset software?
    do you have a manual?
    Is it UCX or RCX?

    Mike Visit my projects blog at: http://mikeeverman.com/
    http://www.bell-evermannews.com/ http://www.bell-everman.com


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    Thanks Mike.
    The drives are Teknic sst-1500 ACX.
    The motors lock up and I have them tuned to Kv=20,000 ; Kp=5,000 ; Ki=25 respectively.
    Motors are Kollmorgen H-344 Silverline series.
    The green light flashes upon enabling the drives.
    I have the manual, Programming cable and SSt-Quickset.
    Pulling my hair out here. Other than a possible faulty encoder, don't know what else it could be.

    Tony



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    Quote Originally Posted by starcat View Post
    Thanks Mike.
    The drives are Teknic sst-1500 ACX.
    The motors lock up and I have them tuned to Kv=20,000 ; Kp=5,000 ; Ki=25 respectively.
    Motors are Kollmorgen H-344 Silverline series.
    The green light flashes upon enabling the drives.
    I have the manual, Programming cable and SSt-Quickset.
    Pulling my hair out here. Other than a possible faulty encoder, don't know what else it could be.

    Tony
    Hi Tony. ACX's are analog in only, so you'll have to switch the control side to analog +/-10v if it will do that(?), and then you may have to tune the torque loops when it's all together.

    Mike Visit my projects blog at: http://mikeeverman.com/
    http://www.bell-evermannews.com/ http://www.bell-everman.com


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    How can I do that with Mach3 ?



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    Quote Originally Posted by starcat View Post
    How can I do that with Mach3 ?
    No clue, sorry. You may need a step and direction to +/-10v converter, if that exists. I'd search for "using Mach3 with analog amplifiers". Maybe there's a break-out board that supports that.

    Mike Visit my projects blog at: http://mikeeverman.com/
    http://www.bell-evermannews.com/ http://www.bell-everman.com


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    Hi Mike.

    Thank you very much. You saved me a lot of frustration.



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    Thank you very much Mike. You saved me a lot of frustration.



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