At the moment, I don't have a lot of time to solve my problem. But I have made some test ... with no good result.
Those timeout are in Auto mode ... In manual mode, It's juste the yellow ratio symptom that I replicated by double click (but that was before you fix it)
My configuration is the next,
PC - USB HUB - USB/Serial - ROBOFOCUS
- I change the RS232 Cable, I made a short one ... but no amelioration
- I remove the UBS/Serial cable, and the USB HUB, by pluging directly the Serial cable of the robofocus on my PC ... allways TTY error