Example Program 19: MM_S19_Vis_PlanAllVision

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Program Introduction

Description

The robot triggers the Mech-Vision project to run. Then, the robot uses for loops to obtain all planned paths and perform picking and placing. In this example, once the camera captures an image, Mech-Vision will plan picking paths for all vision results. This program is applicable to scenarios where one image is used to perform picking for multiple times.

File path

You can navigate to the installation directory of Mech-Vision and Mech-Viz and find the file by using the Communication Component/Robot_Interface/ABB/sample/MM_S19_Vis_PlanAllVision path.

For RobotWare6, the file extension is .mod. For RobotWare7, please modify the file extension from .mod to .modx.

Project

Mech-Vision project

In this project, the Plan all vision results parameter of the Global Configuration Step on the Workflow tab in the path planning tool is enabled. You can click Open the editor on the Path Planning Step to open the path planning tool.
sample19 1

Prerequisites

  1. You have set up the standard interface communication.

  2. Automatic calibration is completed.
This example program is provided for reference only. Before using the program, please modify the program according to the actual scenario.

Program Description

This part describes the MM_S19_Vis_PlanAllVision example program.

The only difference between the MM_S19_Vis_PlanAllVision example program and the MM_S3_Vis_Path example program is that MM_S19_Vis_PlanAllVision can use for loops to obtain all planned paths and perform picking and placing (this code of this feature is bolded). As such, only the feature of using for loops to obtain all planned paths and perform picking and placing is described in the following section. For information about the parts of MM_S19_Vis_PlanAllVision that are consistent with those of MM_S3_Vis_Path, see Example Program: MM_S3_Vis_Path. 
MODULE MM_S19_Vis_PlanAllVision
!----------------------------------------------------------
! FUNCTION: trigger Mech-Vision project, plan all vision
! results and get all planned paths
! Mech-Mind, 2023-12-25
!----------------------------------------------------------
!define local num variables
LOCAL VAR num pose_num:=0;
LOCAL VAR num status:=0;
LOCAL VAR num toolid{20}:=[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0];
LOCAL VAR num vis_pose_num:=0;
LOCAL VAR num count:=0;
LOCAL VAR num pick_cnt:=0;
LOCAL VAR num residual:=0;
LOCAL VAR num label{20}:=[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0];
!define local joint&pose variables
LOCAL CONST jointtarget home:=[[0,0,0,0,90,0],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]];
LOCAL CONST jointtarget snap_jps:=[[0,0,0,0,90,0],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]];
LOCAL PERS robtarget camera_capture:=[[302.00,0.00,558.00],[0,0,-1,0],[0,0,0,0],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]];
LOCAL PERS robtarget drop_waypoint:=[[302.00,0.00,558.00],[0,0,-1,0],[0,0,0,0],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]];
LOCAL PERS robtarget drop:=[[302.00,0.00,558.00],[0,0,-1,0],[0,0,0,0],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]];
LOCAL PERS jointtarget jps{20}:=
[
    [[0,0,0,0,90,0],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]],
    [[65.8654,94.6966,32.2878,-3.7036,-39.7668,-111.261],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]],
    [[66.3351,103.661,20.3594,-3.9153,-36.8271,-110.505],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]],
    [[65.8654,94.6966,32.2878,-3.7036,-39.7668,-111.261],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]],
    [[0,0,0,0,90,0],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]],
    [[0,0,0,0,90,0],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]],
    [[-9.7932,85.483,6.0459,-20.5518,-3.0126,-169.245],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]],
    [[-9.653,95.4782,-4.3661,-23.6568,-2.6275,-165.996],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]],
    [[-9.7932,85.483,6.0459,-20.5518,-3.0126,-169.245],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]],
    [[0,0,0,0,90,0],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]],
    [[0,0,0,0,90,0],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]],
    [[28.8422,90.4027,-13.4878,13.7086,10.2751,-164.54],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]],
    [[29.122,100.975,-26.3271,11.2142,12.4744,-161.72],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]],
    [[28.8422,90.4027,-13.4878,13.7086,10.2751,-164.54],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]],
    [[0,0,0,0,90,0],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]],
    [[0,0,0,0,90,0],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]],
    [[28.7848,90.399,-13.628,14.5039,10.6719,-165.371],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]],
    [[29.0915,100.961,-26.4037,12.003,12.8098,-162.514],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]],
    [[28.7848,90.399,-13.628,14.5039,10.6719,-165.371],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]],
    [[0,0,0,0,90,0],[9E+9,9E+9,9E+9,9E+9,9E+9,9E+9]]
];
!define local tooldata variables
LOCAL PERS tooldata gripper1:=[TRUE,[[0,0,0],[1,0,0,0]],[0.001,[0,0,0.001],[1,0,0,0],0,0,0]];

PROC Sample_19()
    !set the acceleration parameters
    AccSet 50, 50;
    !set the velocity parameters
    VelSet 50, 1000;
    !move to robot home position
    MoveAbsJ home\NoEOffs,v3000,fine,gripper1;
    !initialize communication parameters (initialization is required only once)
    MM_Init_Socket "127.0.0.1",50000,300;
RECAP:
    !move to image-capturing position
    MoveL camera_capture,v1000,fine,gripper1;
    !open socket connection
    MM_Open_Socket;
    !trigger NO.1 Mech-Vision project
    MM_Start_Vis 1,0,2,snap_jps;
    !get planned path from NO.1 Mech-Vision project, 2nd argument (1) means getting pose in JPs
    MM_Get_VisPath 1,1,pose_num,vis_pose_num,status;
    !check whether planned path has been got from Mech-Vision successfully
    IF status<>1103 THEN
        !add error handling logic here according to different error codes
        !e.g.: status=1003 means no point cloud in ROI
        !e.g.: status=1002 means no vision result
        Stop;
    ENDIF
    !close socket connection
    MM_Close_Socket;
    !save all waypoint data to local variables using for-loop, a maximum of 50 points are supported
    FOR i FROM 1 TO pose_num DO
        count:=i;
        MM_Get_Jps count,jps{count},label{count},toolid{count};
    ENDFOR
    !parse pick cycle count, here suppose 5 points per planned path
    pick_cnt:= pose_num DIV 5;
    residual:= pose_num MOD 5;
    !check if parsed data is valid; if not, retry to get planned path or add some error handling logic
    IF (pick_cnt<1) OR (residual<>0) THEN
        Stop;
        GOTO RECAP;
    ENDIF
    !repeatedly run pick-and-place cycle using for-loop
    FOR i FROM 1 TO pick_cnt DO
        count:=(i-1)*5;
        !follow the planned path to pick
        MoveAbsJ jps{1+count},v1000,z50,gripper1;
        MoveAbsJ jps{2+count},v1000,fine,gripper1;
        MoveAbsJ jps{3+count},v1000,fine,gripper1;
        !add object grasping logic here, such as "setdo DO_1, 1;"
        Stop;
        MoveAbsJ jps{4+count},v1000,fine,gripper1;
        MoveAbsJ jps{5+count},v1000,z50,gripper1;
        !move to intermediate waypoint of placing
        MoveJ drop_waypoint,v1000,z50,gripper1;
        !move to approach waypoint of placing
        MoveL RelTool(drop,0,0,-100),v1000,fine,gripper1;
        !move to placing waypoint
        MoveL drop,v300,fine,gripper1;
        !add object releasing logic here, such as "setdo DO_1, 0;"
        Stop;
        !move to departure waypoint of placing
        MoveL RelTool(drop,0,0,-100),v1000,fine,gripper1;
        !move to intermediate waypoint of placing
        MoveJ drop_waypoint,v1000,z50,gripper1;
    ENDFOR
    !finish pick and-place cycle, and jump back to camera capturing
    GOTO RECAP;
ENDPROC
ENDMODULE

The workflow corresponding to the above example program code is shown in the figure below.

sample19

The table below describes the feature of using for loops to obtain all planned paths and perform picking and placing. You can click the hyperlink to the command name to view its detailed description.

Feature Code and description

Store the planned path by looping

 
FOR i FROM 1 TO pose_num DO
    count:=i;
    MM_Get_JPS count,jps{count},label{count},toolid{count};
ENDFOR

  • Line 1: FOR indicates a for loop. i is used to control the number of iterations in the loop (i.e., i starts from 1 and increments by 1 after each loop iteration until it exceeds the value of pose_num, at which point the loop ends). pose_num is the third parameter of the MM_Get_VisPath command, which represents the number of waypoints returned by the vision system.

  • Line 2: Assign the value of i to count, where count represents the ID of the current waypoint in the total planned path.

  • Line 3: The MM_Get_Jps command stores the joint positions, label, and tool ID of a specific waypoint in the specific variables. The entire command stores the joint positions, label, and tool ID of the waypoint with an ID of count in the jps{count}, label{count}, and toolid{count} variables respectively.

Calculate pick_cnt and residual

 
!parse pick cycle count, here suppose 5 points per planned path
pick_cnt:= pose_num DIV 5;
residual:= pose_num MOD 5;

This example program assumes that each planned picking path contains 5 waypoints. pose_num DIV 5 stands for the quotient of the pose_num value divided by 5, and pose_num MOD 5 stands for the remainder of the pose_num value divided by 5. pick_cnt is the total number of picking times planned. If residual is not set to 0, the planned number of picking waypoints is less than 5 (i.e., an error has occurred during path planning and a re-planning operation is needed).

Determine whether an error has occurred during path planning

 
IF (pick_cnt<1) OR (residual<>0) THEN
    Stop;
    GOTO RECAP;
ENDIF

If the number of picking times (pick_cnt) is less than 1 or the value of residual is not 0, an error has occurred during path planning. You need to add processing code here, such as the code to restart the Mech-Vision project and then obtain the planned path.

Perform picking and placing by looping

 
FOR i FROM 1 TO pick_cnt DO
    count:=(i-1)*5;
    !follow the planned path to pick
    MoveAbsJ jps{1+count},v1000,z50,gripper1;
    MoveAbsJ jps{2+count},v1000,fine,gripper1;
    MoveAbsJ jps{3+count},v1000,fine,gripper1;
    !add object grasping logic here, such as "setdo DO_1, 1;"
    Stop;
    MoveAbsJ jps{4+count},v1000,fine,gripper1;
    MoveAbsJ jps{5+count},v1000,z50,gripper1;
    !move to intermediate waypoint of placing
    MoveJ drop_waypoint,v1000,z50,gripper1;
    !move to approach waypoint of placing
    MoveL RelTool(drop,0,0,-100),v1000,fine,gripper1;
    !move to placing waypoint
    MoveL drop,v300,fine,gripper1;
    !add object releasing logic here, such as "setdo DO_1, 0;"
    Stop;
    !move to departure waypoint of placing
    MoveL RelTool(drop,0,0,-100),v1000,fine,gripper1;
    !move to intermediate waypoint of placing
    MoveJ drop_waypoint,v1000,z50,gripper1;
ENDFOR

The above code indicates that in the for loop, the robot moves to the 5 waypoints planned each time to complete the picking operation and then performs the placing operation. i is used to control the number of iterations in the loop (i.e., i starts from 1 and increments by 1 after each loop iteration until it exceeds the value of pick_cnt, at which point the loop ends. When i increments by 1, count increments by 5. {1+count} to {5+count} denote the ID of the 5 waypoints planned each time in the total planned path.

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