Regular Picking

When the Picking Method is set to Regular picking, you can configure the following parameters.

In addition, you should refer to Configure the Tool to configure the corresponding end tool.

Move-Type Step Common Parameters

Send Waypoint

Selected by default, i.e., send the current waypoint to the receiver, such as the robot. Once deselected, the current waypoint will not be sent. However, the waypoint will remain in the planned path.

Try Continuously Running through Succeeding Non-Moves

Unselected by default. When non-move Steps, such as Visual Recognition, Set DO, Check DI, etc., are connected between move-type Steps, the sending of the waypoints will be interrupted, and the real robot will take a short pause, reducing the smoothness of running.

When this parameter is selected, the project will continue to run without waiting for the current move-type Step to complete execution, and therefore the robot can move in a smooth way without pauses. However, selecting this parameter may cause the execution of the Step to end prematurely.

Why will this feature cause the execution of the Step to end prematurely?

Mech-Viz will send multiple waypoints simultaneously to the robot when the project is running. When the currently returned JPs of the robot correspond to the last waypoint sent by Mech-Viz, Mech-Viz will assume that the robot has moved to the last waypoint.

For example, there are 10 move-type Steps in a path, and the pose of the 5th move-type Step is the same as that of the last move-type Step. When the robot moves at a low speed, the current JPs will be sent to Mech-Viz after the robot moves to the 5th waypoint. Since the poses of the 5th move-type Step and the last move-type Step are the same, Mech-Viz may mistakenly determine that the robot has reached all waypoints and prematurely ends the command.

Do Not Check Collision with Placed Target Object

Once Detect collisions on target objects is enabled in the Collisions panel, selecting this parameter will disable the collision detection between the robot, robot tool, and placed target objects. Typically, this parameter is selected in the move-type Step following the Step whose Pick or place is set to Place to avoid false collision detections.

Application Example:

The TCP of a depalletizing vacuum gripper is usually set inside the model rather than on the surface of the vacuum gripper. As a result, when picking a box, the vacuum gripper model may overlap with the box model. However, the software does not detect collisions between the end tool and the picked target object, so no collision alarm will be triggered during picking. Once the robot places the box down, the picked box model becomes a scene model, and the software will start to detect the collision between the end tool and the box’s scene model, triggering a collision alarm and preventing the completion of the palletizing task.

Once this parameter is selected, no collision between the robot, end tool, and the model of the placed target object will be detected, and the above issue will be resolved.

Point Cloud Collision Detection Mode

Usually, Auto can be selected, i.e., directly apply the Point cloud collision detection settings in the Collisions panel. For the Steps between picking and placing, Check collision can typically be selected.

Auto

Default setting. Once Detect collisions on target objects is enabled in the Collisions panel, only point cloud collisions of the “Vision Move” Step and the “Relative Move” Steps that depend on the “Vision Move” Step will be detected, while other move-type Steps will not be detected.

Do not check collision

Point cloud collisions of all move-type Steps will not be detected.

Check collision

Point cloud collisions of all move-type Steps will be detected.

Ignore Target Object Symmetry

This parameter is only visible when the Waypoint type of the move-type Step is set to Target object pose.

The target object symmetry here refers to the Rotational symmetry of held target object predefined in the target object editor during collision model setup.

None

Default setting, i.e., do not ignore symmetry on any axis.

Around target object frame Z axis

Only ignore symmetry around the Z-axis.

Around target object frame X&Y axes

Ignore symmetry around the X-axis and Y-axis.

Around all axes

Once the symmetry around all axes is ignored, the robot will place the object strictly according to the target object pose.

When the move-type Steps are used to place the target objects, the consistency of the placing poses of the target objects cannot be guaranteed once the rotational symmetry is applied. If you want all target objects to be placed strictly according to a specific rule, ignore the symmetry of the target object around all axes.
Plan Failure Out Port

Once this parameter is selected, a Plan failure exit port will be added to the Step.

If the path planning of the current Step succeeds, the workflow will continue along the Success exit port. If the path planning of the current Step fails, the workflow will proceed along the Plan failure exit port. If multiple move-type Steps with “Plan failure” exit ports display in the same plan history entry, the workflow will proceed along the “Plan failure” exit port of the first move-type Step.

Held Target Object Collision Detection Settings

Before configuring this parameter group, please go to the Collisions panel and enable Detect collisions on target objects.

Disabling collision detection will increase the collision risks. Please select the following parameters with caution.
Do Not Check Collision with Scene Objects

Once this parameter is selected, collisions between the held target object and the scene model will not be detected, reducing the computational load of collision detection in the software, speeding up path planning, and optimizing the overall cycle time.

Do Not Check Collision with Robot

Once this parameter is selected, collisions between the held target object and the robot will not be detected, reducing the computational load of collision detection in the software, speeding up path planning, and optimizing the overall cycle time.

Do Not Check Collision with Point Cloud

Once Point cloud collision detection is enabled in the Collisions panel, selecting this parameter will stop detecting collisions between the held target object and the point cloud, further reducing the software’s computational load, shortening path planning time, and enhancing the overall cycle time.

Vision Result Global Usage

All Vision Poses in One Move

Usually, Vision Move will only use one pose of the corresponding vision result. However, once this parameter is selected, the robot will move through all waypoints corresponding to the vision poses at one time.

This parameter is usually used when the robot moves in a fixed path where no DO signals will be sent, such as the gluing application.

Reuse Vision Result

When this feature is not enabled, each time “Vision Move” plans a robot picking path successfully, the rest unused vision results will be discarded. If this feature is enabled, the vision result that leads to a planning failure and the rest unused vision results will be retained and used for the next planning. This feature should be used with the “Is Vision Result Used Up” Step.

When there are multiple pickable objects in one vision result and it can be guaranteed that picking one object will not affect the poses of other objects, this option can be selected. The vision result will be reused and no new image will be captured until all vision results are used up.

Application Example

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Share Vision Result

This feature enables multiple “Vision Move” Steps in which the same vision service is selected to share the vision result.

When one “Vision Move” Step plans successfully, the corresponding vision result will be used, and the unused vision result will be used by the next “Vision Move” Step with this feature enabled. After all “Vision Move” Steps that share the vision result complete planning, the rest results will be discarded.

In addition, this feature can be used in conjunction with the “Reuse Vision Result” feature. When “Reuse Vision Result” is selected, the rest vision results will not be discarded even after all “Vision Move” Steps have completed one round of planning.

Supplementary Features

Re-Locate Bin with Vision

Once the Update Bin Pose with Vision parameter is selected, the bin will be recognized and located simultaneously while the camera captures the image for target object recognition. Therefore, the bin pose in the simulation area can be updated dynamically, which facilitates the collision detection algorithm to effectively prevent the robot from colliding with the bin.

This feature will provide three fields, scene_object_names, scene_object_poses, and scene_object_sizes, in the vision result to define the name, pose, and dimensions of the scene object to be updated.

Filter Vision Result
  • Result Must Be in Specified Bin

    This feature limits that the vision result received by the current “Vision Move” Step must be in a specified bin. The vision result out of the effective bin range will not be used.

    Each bin’s effective range for vision result can be configured separately in the corresponding configuration window. Only bins with “Set effective range for pose” enabled can be selected in the drop-down menu.

    Application Example

    Add “Bin1”, and enable the “Set effective range for pose” parameter for this bin.

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    Select “Bin1” in the drop-down menu.

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  • Filter Poses

    Use all

    Do not filter poses. All poses in the vision result will be used for path planning.

    Filter by target object info

    Once this option is selected, the poses can be filtered by the names of the target object and pick point. After selecting a target object, which is configured in the target object editor, in the drop-down list of the Use Specified Target Object parameter, you can Use Specified Pick Point. If a target object is specified but no pick point is specified, all pick points of the specified target object will be used for path planning.

    Filter by pick point label

    Once this option is selected, the poses can be filtered by the pick point label. After entering the label in the parameter field of Use Specified Pick Point Label, only pick points with the specified label will be used for path planning. Deep learning labels and numeric labels set in the target object editor are supported.

Avoid Picking on Same Target Object

This parameter group is mainly used to avoid picking on the same pick point in scenarios where the object cannot be picked successfully.

Once the Filter Out Unlikely Pick Point parameter is selected, you can adjust the following parameters.

  • Filter Subject

    • Pick point: Only pick points with high failure rates will be deprioritized in the picking and discarded in some rounds.

    • Target object: if any one pick point on the target object is considered to have a high failure rate, all pick points on this object will be deprioritized in the picking and discarded in some rounds.

  • Priority Downgrade Radius

    A sphere with this parameter value as its radius and the pick point successfully planned in the last round as its center will be introduced. If a pick point in the latest vision result falls within this sphere, the pick point will be put off for picking with a decreased picking priority.

  • Discard Attempt Radius

    A sphere with this parameter value as its radius and the pick point successfully planned in the last round as its center will be introduced. If a pick point in the latest vision result falls within this sphere, the pick point will be discarded in this round of planning.

    For example, if the robot only moves the crankshaft but fails to pick it on the first attempt, there is a possibility of successful picking on the next attempt. Therefore, Priority Downgrade Radius can be set to downgrade the priority of the pick point, while the pick point will not be discarded. When the robot fails to move the crankshaft at all in the first attempt, it is highly unlikely that the crankshaft can be picked successfully in the next attempt, and therefore Discard Attempt Radius can be set to discard the pose directly.

Count of Picked Target Objects

Limit Total Count

Select Limit Total Count and you can set the maximum Planned Count and other parameters.

Planned Count

The maximum number of target objects allowed to be picked during the project execution.

Number of Picked Target Objects

The total number of target objects picked so far.

Count of Picked This Time

The number of target objects picked this time. When the picking method is set to Regular picking or Box depalletizing with the Depalletizing Mode of One by one, this value is fixed at 1 if the picking proceeds normally.

Vision Service Name

Please select the Mech-Vision project in the same solution.

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