@donkjr the way we left off, and best I understand nothing has changed, is that Rick can run at a single laser value with the C3D controlling L. This is his “works” but we still need to determine if changing the pot results in different laser fire levels.
@raykholo , @Rick_Jarvis1 that is simple to test? Change the pot hit “Test Switch” and notice if the current changes with the pot? Are you thinking that the PWM inside the PS is not working?
I had him meter the PWM output of the C3D and all was behaving according to plan. Is it possible that the psu would be “frozen” at a particular power level? I think so. Yeah, we need Rick to test these things before proceeding with any debugging strategy.
@raykholo The LPS PWM is generated from an internal PWM controller using the POT to set the DF. The “L” signal simply enables the internal PWM to be … on or off.
Therefore if the L signal is changing DF and the laser power is constant then … well that is weird :(.
Its more likely that the L signal is not changing DF.
Your suggestion to test with the test button and “L” disconnected at various pot positions is a good starting point.
BTW how did you measure the C3D PWM’s DF with a meter?