Specifications

The procedures in the following pages will result in the most proper and accurate
alignment and repair of the Z encoder system that is possible and/or feasible in the
field by a technician.
It can be seen that the proper alignment of the Z encoder can result in maintaining
embroidery quality and proper machine operation. Slight Z encoder misalignment
can cause many kinds of erratic operation and/or intermittent thread breaks. A
larger misalignment can be the cause of equipment damage and subsequent
electronic or mechanical failures. The careful application of the Z encoder
procedures by a factory trained technician will result in a machine that will operate
correctly and reliably.
Inspection
This procedure is a guide for determining the condition of the encoder.
Inspect the Z shaft encoder following the steps below. If the requirements of this
process are not met, replace the encoder by following the Shaft Encoder Installation
procedure.
1. Switch the peripheral OFF, lower the table top, and remove the rear head cover.
2. When switched back on it is important that the computer not down load a design
to the peripheral. To insure this condition remove the network cable (or boot
disk if used).
3. With the network cable removed (or boot disk not inserted into the disk drive),
turn ON the embroidery peripheral.
4. Locate the green LED marked "ZINDEX" on the front of the peripheral, above the
lowered table top (see Figure 3-2).
Or remove the card cage cover and locate the innermost LED on the top of the
CPU. Most likely this LED will not be glowing. It is only supposed to glow for a 1
degree duration each revolution of the Z shaft encode
5. Rotate the embroidery head manually in a clockwise direction (when viewing from
the rear of the machine). This rotation can be performed by rotating the shaft
pulley that is driven by the motor belt (see Figure 3-3).
Green LED
marked ZINDEX
Figure 3 - 2
3 - 4 Z Shaft Encoder
EMT 10T Technical Manual Melco Embroidery Systems