Before adjusting head timing, check the following:
•
Tension settings (upper and lower)
•
Needle condition, size, and type of point
•
Lubrication of hook assembly and head
•
Nicks in the presser foot or needle plate
•
Presser foot height
•
Stitch density
•
Proper embroidery technique for the material being used (i.e. backing material, type and
size of thread)
•
Material improperly hooped
•
Needle Bar depth incorrect
Making A Stitch
How well the embroidery head makes a stitch depends on the needle/hook relationship. Figure
5-23 shows how the embroidery head makes a single stitch. Understanding this stitch cycle will
help produce quality embroidery.
The needle moves down through the fabric and then starts back. This action creates a small loop in
the thread behind the needle. The degree of tightness of the loop depends on thread tensions.
When the loop forms, the rotating hook must be in position to catch the thread. Once the hook
catches this loop, it wraps the thread around the bobbin case, capturing the bobbin thread. As the
needle rises, the loop is lifted by the take-up lever with the bobbin thread inside it. This procedure
repeats for each stitch.
Figure 5-23
5 - 16
Head Timing
Advantage 18 Operation Manual
Melco Embroidery Systems
Summary of Contents for Advantage 18
Page 6: ...Table of Contents Operation Manual iv Advantage 18 ...
Page 14: ...1 8 Start Up Messages Advantage 18 Operation Manual Melco Embroidery Systems ...
Page 92: ...C 2 Advantage 18 Operation Manual Melco Embroidery Systems ...
Page 94: ...Advantage 18 Operation Manual Melco Embroidery Systems ...
Page 96: ...Quick Reference Guide for Advantage 18 Part Number 110265 01 Rev A ...