Hi growing_older. You have indicated that the solution you implemented in the past involved overtime (presumably when the production line is down?)
To avoid uncompensated overtime you have withheld this information. People are just focusing on this part - you withheld information. I personally think its understandable if your company has a history of asking people to work overtime without recognizing it somehow.
If I were in your shoes I would simply volunteer the information like this:
"Hi Boss, last time this occurred, I was able to patch the machinery's software. This solution was obviously only temporary, however, I am willing to train someone to implement this solution during my normal working hours. What do you think?"
If the boss asks that you implement it yourself outside of working hours can you not just politely decline or request that it be compensated? I think you would have to firmly, but politely, force this issue. Maybe the resentment that is slowly built up inside you is blocking you from doing this?
EDIT: oops, looks like you went ahead and fixed the machinery. However, you did it without first asking your new boss? That part I don't really understand. How hard would it have been to consult with him first?
To avoid uncompensated overtime you have withheld this information. People are just focusing on this part - you withheld information. I personally think its understandable if your company has a history of asking people to work overtime without recognizing it somehow.
If I were in your shoes I would simply volunteer the information like this:
"Hi Boss, last time this occurred, I was able to patch the machinery's software. This solution was obviously only temporary, however, I am willing to train someone to implement this solution during my normal working hours. What do you think?"
If the boss asks that you implement it yourself outside of working hours can you not just politely decline or request that it be compensated? I think you would have to firmly, but politely, force this issue. Maybe the resentment that is slowly built up inside you is blocking you from doing this?
EDIT: oops, looks like you went ahead and fixed the machinery. However, you did it without first asking your new boss? That part I don't really understand. How hard would it have been to consult with him first?