I got 2 used KR210 robots that have holes done by some drill about 4mm under the 3rd axis in the same place in both robots.
One arm has one hole that when i lifted the arm leaked green oil from this hole and the other has 2 holes.
What can be the purpose of these holes ?
Seems that are not factory holes but done afterwards with hand drill so iam trying understand what is the purpose of these holes.
especially because one hole leaks green oil...
The robots work fine i have tested them..