I've got a strange issue that I can't quite place my finger on.

I have had the stepper for the extruder turning before, but after a long failed attempt to upgrade the firmware the extruder controller is not driving the stepper motor any longer.

Now I have the led's flashing correctly but nothing out of the motor (no heat out of the A3949 chips either)

I thought, hey I must have blown the A3949's when I wasn't paying attention, but they appear fine.


Next I looked at the board for a while and noticed occasionally that 2 of the led's wouldn't flash but the other two would. then all 4 would be flashing, then just two. So I thought, loose connection?

anyone have any test parameters for the A3949's? Other wise I might try to reflow solder. Looking for some expert opinions here as to what part of the board to be looking at.


-aaron

... maybe the firmware update changed the pin configuration?

Check if you have selected the correct boards in "pins.h" ...

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Viktor
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