Who is the manufacturer of your printrboard? There's a dodgy version that uses a modified design and only 2 PCB layers.
The proper design is a 4 layer board.
To drop the extra 2 layers they have replaced the power plane with a single thin track that winds its away around the board and supplies power to everything.
The proper design is a 4 layer board.
To drop the extra 2 layers they have replaced the power plane with a single thin track that winds its away around the board and supplies power to everything.