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The intermittent jam error you are having is due to the carriage not g oing all the way back to the right, or home position. If it does go all the way back to the right. That sping loaded piece of plastic should be up and in the vertical position. But when the carriage doesnt go all the way to the right it depresses the spring, telling the machine there is a jam.
So try this, push the carriage by hand to the right till its home. Then turn the machine off and on and that will clear the jam messsage. This time around.
And you may be find for the next several print attempts.. When the error returns, repeat the above steps.
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