Safeguarding of complex machining cells
Two absolute-precision robots, which handle endoscopes at a total of eight stations, are to be secured.
The cell contains two ABB 1400-1.2 absolute-precision robots. They process the endoscopes at a total of eight stations. The machining stations saw, mill, grind, polish and measure the endoscopes. Each robot has two grippers as tools and nine work objects. It takes more than 15 minutes to machine a part. The machining programmes are correspondingly long and complex.
The operator wants to make his cell as secure as possible. To achieve this, the robot must be able to continue production immediately after changing the gripper, moving the cell or replacing mechanical components, without any downtime.
The Wiest technologies, loop:in, tool:in and base:in were used for this. All tools and work objects were captured. This means that not only are the working points of the tool and work objects measured very accurately, but they can also be reproduced with repeatability. After a gripper crash, either the gripper or its replacement is remeasured to correct the tool data. Re-teaching is not necessary. The same applies to work objects: If you need to move a workobject in the cell and it has been measured, you can do so without any problems. By measuring the modified work object, its programme points are again exactly correct.