The X and Y rods on the Ultimaker should be at exactly 90 degrees to each other. This can sometimes be tricky to achieve since it is done by aligning the sliding blocks. <br><br><span>This gives you an object to align the sliding blocks to, and it's easy to position on the frame.<br><br></span>Print it and: <br><br>1. Loosen all pulleys as per UM instructions. <br>2. Place it in a corner and align a sliding block to the protruding end.<br>3. Tighten respective pulleys.<br>4. Repeat for the other 3 sliding blocks.
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