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$robroot on ABB?

  • RoboticsMan
  • November 27, 2019 at 12:15 PM
  • Thread is Unresolved
  • RoboticsMan
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    • November 27, 2019 at 12:15 PM
    • #1

    Hi All!

    On the KUKA there is a coordinate system called $robroot. This corresponds to the center of the base of the robot - even when the robot is mounted on a track. So if the robot is moved on the track, the TCP coordinate in the $robroot coordinate system will remain constant (as long as only the external axis is moving).

    Is there a way to get something similar to $robroot on an ABB robot?

    Thanks in advance!

    /RoboticsMan

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  • paubau
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    • November 27, 2019 at 2:50 PM
    • #2

    whats wrong with wobj0 ? this is always related to base coordsystem

  • RoboticsMan
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    • November 27, 2019 at 3:09 PM
    • #3
    Quote from paubau

    whats wrong with wobj0 ? this is always related to base coordsystem

    Hmm ok. But if I have a robot on a linear axis, and I move the robot on the axis, will wobj0 move with the robot, or stay in one place? I want a workObject that corresponds to the origin of the robot base, not to the origin of the axis that the robot is moving on.

  • paubau
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    • November 27, 2019 at 3:38 PM
    • #4
    Quote

    If no other workobject is specified, the targets will be related to the default Wobj0, which always coincides with the base frame of the robot.

    doesnt matter if the robot itselfe is moving on a track, wobj0 will always stays the same.

    quote is from operating manual, p.23

  • RoboticsMan
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    • November 27, 2019 at 3:43 PM
    • #5

    I just tested it by selecting wobj0 and moving the external axis in RobotStudio. The coordinates of the TCP change if I jog the external axis that the robot is standing on. I want the coordinates to be constant - like it would be if the robot didn't know it was standing on an axis.

  • paubau
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    • November 27, 2019 at 3:56 PM
    • #6

    oh then i got you wrong.. related to world coordsystem, the tcp coordinates wont stay constant if robot is moving on external axis..

    Quote

    The robot's baseframe must be configured to be moved by the track.

    sadly i cant tell you how to configure this, but there are manuals on how to setup external axes

  • RoboticsMan
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    • November 29, 2019 at 10:48 AM
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    • #7

    Hello again

    I found a solution myself:

    PERS wobjdata wobj_internal:=[FALSE,FALSE,"TRACK_1",[[0,0,0],[1,0,0,0]],[[0,0,0],[1,0,0,0]]];

    When the workobject is set up like this, it will move with the robot on the track. That was all I needed to change :smiling_face:

    /RoboticsMan

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