I know there is no real limit about how many construction and logistic robots you can put in your factory.
However, there is probably a maximum number that will cause the game crash if reached. Did the dev team already talk about this or any other official source?
Best Answer
There is no (practically-reachable) limit on how many robots you can have
The actual limiting-factor is how many robots the game can update each tic. I've had games with 5000 robots out at once; many of them just floated in-place doing nothing for long periods, even though there was work to be done.
I'd guesstimate the limit was around 2000 active robots, but I have no data to back that up.