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Service manual
• Part 1 adjusts the needle to the central position screw (same position as the adjustment of the rack tray
reference). This adjustment consists of moving the needle until it comes into contact with the reference screw
on the rack tray. This operation can be completed by moving the needle to an absolute Z coordinate, Z-direct
box, and then using the needle up and needle down keys until contact is made with the screw. The programme
then calculates the real reference by adding a constant value so that the needle is lowered to the rack position.
Bear in mind that the encoder detection of the needle is not enabled. Consequently, if there is a collision by
entering a high value in the Z-direct box, it may collide with the screw. In this case, use the Home button to
reinitialise the Z axis and repeat the process from the beginning.
• Part 2 adjusts the offsets to reduce the zero volume without colliding with the racks, adding or subtracting
steps to or from the value adjusted in part 1. This operation must be carried out by trial and error. First enter a
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