Is it possible that a robot can lose accuracy due to being cold? Is it a common practice to " warm up" an arm before running a program?

Cold vs warm
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popbot -
July 13, 2016 at 7:51 PM -
Thread is Resolved
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I usually don't "warm 'em up", but perhaps our processes aren't as demanding.
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It is going to depend on a couple of factors.
What is the temperature range the robot will be operating in?
What degree of accuracy do you need to maintain?I worked with a customer on a machining application where the robot was in a building where the temperature varied from freezing to 100 degrees F .
They wanted to keep the accuracy with .5 mm.
They had to add temperature control to the enclosure the robot was in and had to warm up the robot for about 20 minutes to maintain that spec. -
My company was sold a used refurbished robot to cut holes in fiberglass. We need to hold a tolerance under .060” for the size of the holes. This robot will hold this tolerance well, but the amount of out of roundness is noticeable. We have a few factors working against us. The biggest one would be this robot is a big one mostly intended for palletizing, not so much for accuracy. It does not support the small hole accuracy software developed that gives the ability to adjust the servos for backlash. We have tested the backlash and have found the arm to be good and in recommended tolerances. In the process of cutting several test hole, we think we may be seeing better roundness results after the robot has warmed up. Holes seem to get progressively rounder as each cut is made. It could be however, just be our imaginations. We have decided to do a tai chi warm up at the start of the shift. Couldn’t hurt.
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What model robot