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Hi Pros,

We did an application demo using Robotiq's products and a 3D Laser Scanner from Creaform.  The purpose of this application demo was to demonstrate how easy it is to perform a 3D inspection of a plastic part using the whole combined solution of Robotiq, UR and Creaform.  

Our goal was to simulate an offline inspection of a plastic part while the production moves on a conveyor. On many production lines, sample parts are removed to be inspected on costly CMM's and they become a bottleneck needing to be operated. The robot would remove a sample part from the production line and inspect it close to it. The 3D scanner being much faster than a CMM to inspect 3D shape inspection proved to be a good option to speed up the process.

We've mounted on a UR5, the Robotiq 2F85 Gripper, the Wrist Camera as well as the FT300. On the scanner side, we've used their HandySCAN3D 700 held by a specific bracket and connected via a specific I/O module & software to ensure communication with the UR controller.

The HandySCAN3D is normally meant to be used as a handheld device. Once activated, 7 laser lines are projected on the part and captured by two cameras. Creaform software VXelement than converts the data to an .STL file that will be compared to a CAD model for inspection purposes.

The customer's goal was to have the robot grab a part on a production conveyor line and bring it to an inspection area in order to qualify the part and extract some measures like a ''Go No Go'' qualification.  

We've used the Wrist Camera to recognize the part on the conveyor and the gripper to grab the part to the inspection where the scanner would do his qualifying job. Since the scanner must be moved at a certain distance normal to the surface, it would have been hard and time-consuming to teach those scanning displacements by waypoint because of the organic shape of the part.  

We've used the path recording function in Robotiq URcap and it was pretty intuitive grabbing the 3D scanner and capturing part geometry like using the device as a handheld device.

See the path recording programming here: 


See the final results of the complete process here:


Did you have such requests from customers who wished for a simple solution for inspecting theirs part without investing in a costly CMM machine?

How did you manage it?

Comments

  • matthewd92matthewd92 Posts: 521Founding Pro, Tactile Sensor Beta Testers Handy
    Thats pretty cool @mikebeauchemin
  • mikebeaucheminmikebeauchemin Posts: 14 Crew
    edited February 19
    See now a complete video we've made for this application.  
  • VictorLVictorL Posts: 2 Recruit
    Is the sensor calibrated (extrinsic calibration, hand-to-eye calibration) on the robot?
    If yes, what software tools did you use?
  • mikebeaucheminmikebeauchemin Posts: 14 Crew
    Hi Victor, the scanner is calibrated either manually or by the robot using a calibration plate within Creaform's proprietary software called VXelements.  The scanner is operated as a slave by the UR Controller using IO's. 
  • salgerbinosalgerbino Posts: 1 Recruit
    This application demo is very interesting. Did you design the specific mounting device to held the Creaform 3D laser Scanner? Based on the specification of the scanner it seems that the global accuracy of the robotic measurement system doesn't depend on the robot. Isn't it?
    Is it available the mounting device to held the only scanner?
    Please let me know ASAP.
    Regards

    Salvatore
  • mikebeaucheminmikebeauchemin Posts: 14 Crew
    Hi @salgerbino the bracket holding the scanner was design by Creaform directly. You are correct, the global accuracy of the solution doesn't depend on the robot but the scanner directly since it's using the reflectives dot to position itself.
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