Z-Axis Failures

The z-axis movement on the AMAYA is controlled by the electronics. The motor driver on the Main PCB sends signals to the Z-motor. Feedback to the Main PCB is provided by the encoder and the z-index optical sensor. These devices tell the AMAYA OS software and the Main PCB where the z-motor position is at during embroidering.

Problem	Possible Causes	Solution
Binding in z-axis or jumpy, uneven movement	z-shaft out of alignment, bearings lost preload	Contact Melco Technical Support. This will require factory repair if true.
	Z-drive timing belt tension too tight or too loose	Adjust the z-belt tensions
	Damaged z-axis timing belt	Replace the z-axis timing belt.
	Binding in the motor windings	Replace the z-motor.
Excess noise in the needle-bar area	Lack of lubrication to the needle bars	Lubricate the needle bars
	Lack of lubrication to the reciprocator or presser foot	Lubricate the needle drive and presser foot
	Damaged needle bar	Replace damaged needle bar
Z-axis runaway	Connection at motor encoder reversed	Reconnect the interface harness to the z-motor correctly
Z-axis runaway	Short in either the z motor harness or the motor interface cable	Replace the defective harness
Can not find z-home	Z-axis flag loose	Set Head Up Position
	Dirty or damaged sensor	Clean or replace the z-index PCB.
	Loose harness connection	Reconnect the harness