Inkshield help

For a high school project, I am making a 3D printer using recycled stepper motors and a printhead. All of the servos are functioning properly off of an Arduino Uno stacked with an h-bridge. The only issue we are having is that the inkshield is not spraying ink. We used the sample code listed on the inkshield website and have seen many people have success with this code. None of our online research has given us much direction. Does anybody here have any suggestions? I attached a picture of the board.

IMG_5936.jpg

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IMG_5936.jpg

...R

It's a nice picture but it is meaningless without a circuit diagram and details of the components.

You say you are planning to build a 3-D printer and then you talk about "spraying ink" - which does not make sense. My 3-D printer extrudes molten plastic.

...R