I have three M20iB Robots that seem to keep losing their place points on my fixtures. For Example. I have some cylindrical parts with holes in them to line up with clevis pins when they get all the way down in the fixture. I have the PLC to try to engage the clevis pins 3 times if they do not engage and make their reed switches the part will be discharged. I can then go in and touch up the place point slightly usually, a yaw, pitch, or roll adjustment, and the problem will be gone for a couple weeks. My thinking is a payload settings problem, or maybe in the main bolts from my base to the floor are allowing the robot over a week or two to walk in the slop in the holes. What is your opinions and things to look into. I cannot scrap parts that are good because I cant get a machine to run them reliably. Thank you in advance.
Losing Pick and Place Points
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2AMechanic -
October 28, 2018 at 2:44 AM -
Thread is marked as Resolved.
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When I see this it is usually the fixtures that are the problem, not the robot.
If there is play in them, if operators can adjust them, then you need to address these issues.
The fact that all 3 are doing this says it is not the robots.
You can setup a way to verify the robots position. A dial indicator or 2, for example, can be set up. Create a program that runs the robot in the indicators and zero them. And when the robot position is off, run in into the indicators. If they are now off it is the robot. Only a couple times did I see that it was the robot.