Hi and big apologies for not coming back earlier, however I had to do urgent house maintenance job which took me the last few days!

Quote Originally Posted by mnewsholme View Post
on the photo of the breakout board. If you look at the 8 pin chip to the right of the 25 pin connector in the bottom left corner. It doesn't look to be seated in its socket correctly. Should just push in to seat fully. Quite common for chips to work out of sockets over a period of time.
I’ve spotted this straight after my first post and pushed in back into its place, thanks!

Quote Originally Posted by Doddy View Post
So, you wired the supply and the outputs pulsed and the output LEDs blinked?
Well, I should explain a little bit better .. they are blinking when touching +5V terminal as same as previously supplying 5V to stepper motors. Once hardwired, all output LEDs are off.

Quote Originally Posted by Doddy View Post
My instinct is that the board is at some level functional - I'll offer to test the board for you to a level that I can diagnose the behaviour of each major functional block - but I don't know how that sits with your time-frame - it might be quicker just to get a BoB ordered in the post).
Doddy, if you have some spare time and willingness to help, I would appreciate! I don’t really have any deadlines, just trying to make some regular progress but please if at any point you will think that something is not right with Bob, let me know and I’ll get a new one as instead of wasting your time on this, I could ask some other questions. Is it worth investing in this type BoB or are there better options in let’s say £100 budget?

In a meantime I’ve sent an email to CNC4PC asking them for some more information about wiring and below is what I received:

‘this is an isolated board, so it has two power terminals. Make sure you are using both. The side that interacts with the PC can be powered with a USB cable. Make sure you put a jumper across the EN and the +5vdc next to it.’

Still don’t explain why all the outputs are inhibited when 5V is wired to PC power terminals. What do you think??