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User defined path for Automove at program start.

Application Description:

In some cases it can be desired to have a known pre-defined path for the Automove during program start and at the same time have a function so the Automove is done by external buttons.

Function description:

In this example a before start routine is made so an external button connected to DI0 is used as user defined automove. If the DI0 button is released the Automove stops and resumes when the DI0 button is pressed again.

The path of user defined automove can be different in case to case and in this example the robot will make a vertical upwards move of 100mm from no matter where the robot is located and then move over to a predefined program home position. If the robot is already up at a certain level the robot will not go further up during the user defined automove, but will move over to program home position.

This example shown here also has a function build-in so another button connected to DI1 is used to start the main program.

I/O table:
DI0 = User defined Automove.
DI1 = Start program.

Variable Table:
automove_done Checks if the user defined automove is complete
current_pos Current position at start
upmove Amount of upwards move (Z) part of user defined automove
up_pose position to move up to during user defined automove
home_pose position of this programs home position.

Program description:

This first Loop in the program checks if DI0 (User defined automove) is active and wait until DI0 becomes non-active in order to avoid automove start immediately.

The second Loop runs as long the User defined automove is not complete. In the second loop the first IF statement checks whether DI0 is active and the user defined automove not yet complete. For this IF statement the “Check expression continuously” is checked in order to abrupt the user defined automove is DI0 is released.

The current position is established and then transformed with the desired amount of upwards movement – in this case 100mm. And then the robot move over to the program home position. However if the robot is already up at a certain level – in this case 380mm then the robot does not perform a upwards movement because in the example this is considered up and out of the obstruction already.

When the user defined automove is complete the automove_done flag is set.

In this example the DI1 is then used to start the program if the automove has been completed.

Program code:


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By Zacobria Lars Skovsgaard
Accredited 2015-2018 Universal Robots support Centre and Forum.


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