Hi,
it seems to me that the C76 is giving you grief, and by the frequency of your posts and the time over which you have
made them makes me think you've bought a dog.
If I understand CNC4PC have tried to help but you still have not go it it to work?
Quite frankly, if even with manufacturers support, you cant get it to work then it is too complicated.
CNC4PC make a range of products and if the C76 doesn't work for you why don't you swap it for two or three C10's
which are really simple and only $23.00 each?
The UC300 is a good external controller......and is by necessity reasonably complicated, but here you have a breakout board
which is worse!!!!
Craig