Measure the presser foot adjustment at bottom dead center (BDC) without a hoop installed. This is the distance from the bottom of the presser foot to the top portion of the needle plate dome. Use a feeler gauge to measure this adjustment.
The height of the presser foot from the top portion of the needle plate dome should be 0.1-0.6 mm when the needle is at BDC.
For minor adjustments to the presser foot height, use the presser foot eccentric located behind the lower section of the needlecase to adjust it.
For adjustments to the presser foot eccentric itself, contact Melco Technical Support for instructions.