Break out Board, I should of worked that out. *slaps head
Everything is integral to the control board BOB and drives as per pic a few posts back.
No buffering though all real time from PC. All is very simple in design, can't understand the high losses as the "hi" state arrives at th optocoupler. It only flows though 1x 470 ohm resistor then the opto.
I currently trying to find a data sheet on the opto to find out the supply for the opto's LED because based on a typical 2v, 20mA LED for a 5v supply you only need a 150 ohm resistor. I'm almost certain this is the issue.
Don't understand for a engineered item why this has happened unless of course it is a manufacturing error.
Adam. |