When a thread breaks, the AMAYA message
box will read, Thread Break, indicating
where the thread break has occurred (either upper or lower). In general,
perform the following procedure to recover from a thread break:
Make sure the thread path through the pinch roller
and take-up lever is clear, there is bobbin thread, and the needle is
Re-thread the needle and press the Start key .
If the problem persists, use the following troubleshooting table as
a guide in fixing the problem.
Possible Problem Area
Material thickness setting may be incorrect
Check the material thickness and adjust if set
too high or too low.
If material thickness is set too high, too much thread is being fed
into the system, and you may see some of these symptoms: looping, popping
thread breaks, and no bobbin showing on the back of the fabric.
If material thickness is set too low, not enough thread is being fed
into the system, and you may see some of the following symptoms: pulling,
puckering, fraying thread, thread breaks, and bobbin showing on the top
of the fabric.
Stitches may be too short and/or too dense
Check the design for short and/or dense stitches,
and edit the design to remove them.
One effective method of removing dense stitches
is to run the Stitch Proximity Filter.
One way to remove short stitches is to open Design Filter ( ). Adjusting
the setting of After
1 Short to After
0 Short will filter ALL stitches of 4 points (the default Short Stitch
Length) or less from the design.
Bobbin Tension, Bobbin Thread, Bobbin Case
Check bobbin tension.
A range of bobbin tension is acceptable. As you gently bounce the bobbin
case - holding the thread with your hand - it should drop approximately
2 - 4 inches / 50 - 100 mm, but bobbin tension can be as loose as when
you hold onto the bobbin thread and let the bobbin case hang, it should
begin a slow but steady drop. Adjust
the bobbin tension if it is outside of this range.
Make sure that the bobbin has been placed correctly
in the bobbin case (click here
Inspect the bobbin case and make sure it is not
damaged and that it is clean (click here
Needles / Needle Depth / Needle Plate
If a needle is installed backwards, turned too much, or turned to the
left, thread breaks can occur. It is recommended that the eye of the needle
be tilted 5° to the right; however a range of needle orientation is acceptable.
of the needle can be facing directly forward or be tilted to the right
by a maximum of 20°.
Inspect needle(s) for damage such as burrs, scratches,
and dullness. Replace if necessary.
Make sure you are using the correct needle(s)
for the size of thread being used.
Check needle depth to make sure that it is correct.
Verify that the needles are centered in the needle
plate. The needle needs to pass approximately through the absolute center
of the hole in the needle plate without rubbing or hitting the needle
plate. If this isn't the case for the majority of the needles (i.e. most
needles are far off to the right or left), refer to the needleplate
Inspect the needle plate hole to be sure it's
free of nicks, burrs or anything that may cause the thread to fray. Replace
Thread / thread path
Make sure the machine is threaded properly (see
Upper Threading for instructions).
Make sure that there is no misguided thread.
The thread should be centered in the groove under the thread feed
Make sure that no thread is caught or wound around the thread feeder
Make sure the red pinch rollers are down.
Make sure you are using high quality thread. Look
for kinks, frays, or thread which seems to unravel and/or twist during
use. If the thread is suspected to be bad, exchange with a high quality
thread to try and isolate the problem.
Be sure the thread tubes, which pass along the
center of each thread cone, extend at least 1" beyond the end of
the cone. Otherwise, the thread may become tangled.
Be sure the thread cones are fully seated against
the thread tree base. If not, the thread could become entangled beneath
Thread feeder / Pinch rollers
Inspect thread feed & pinch rollers for wear
and/or damage (see Thread Feeder Roller Inspection and
Cleaning for instructions). Replace if necessary.
If you can easily pull thread without lifting the pinch roller, the
thread feeder roller may be worn / damaged and should be closely inspected.
Fabric and hoops
Check how the garment is hooped; garment may be
hooped too loosely.
The fabric should be very taut in the hoop, similar to a drum. Depending
on the fabric, if it is slipping in the hoop, you may need to wrap the
bottom hoop with a fabric "seam binding."
Make sure the hoop arms are attached securely.
It is important that the arms are securely attached to the machine.
If you can wiggle the hoop arms side to side, they are too loose. Click
here for instructions on
Make sure hoop arm bracket clips are secured tightly.
When you slide the hoop underneath the bracket clips, both sides should
snap securely into place. If either side of the hoop can move front to
back or is not seated underneath the clip, the hoop may move during sewing.
Click here for instructions
A quick test to see if the arms and/or clips are loose is to sew a
fill pattern inside a border. You will likely notice poor registration.
The concentric circles on the AMPASS or BRAVOPASS design are good for
this as well. You will notice more distortion in the X direction than
in the Y direction.
Check the backing you are using.
Inadequate backing allows fabric to be pulled into the needle plate
hole. If needed, increase the number of backing pieces or change backing
Review the weight of the garment being sewed.
If you are sewing a particularly heavy garment, try sewing at a slower
speed to see if the thread breaks become less frequent. Furthermore,
if there is an abundance of material hanging outside the hoop, be sure
it hasn't become tangled with adjacent hardware.
Make sure the hoop isn't hitting the needle plate.
On occasion, due to frequent use and possibly rough operation, it may
be that the hoop arms and/or the hoop itself become bent downwards. As
a result, if sewing very close to the hoop perimeter, the hoop may hit
against the needle plate causing a thread break. Examine
the hoop arms; if they are bent down, contact Melco Service.
Check the hook timing and the hook gap; one (or
both) may be out of adjustment.
Check to make sure the rotary hook is rotating
smoothly & sufficiently oiled.
If it is not, clean,
oil, and if the problems
If you are still experiencing thread breaks after checking all of the
areas discussed in the above table, you may want to perform a more in-depth
analysis. This analysis involves sewing out the test design, AMPASS or
In AMAYA OS, click on
Load Design and locate AMPASSXXX or BRAVOPASXXX
(where XXX is the latest released version), under
C:\Program Files\Melco Embroidery Systems\Amaya\Test
Designs\AMPASSXXX.exp (or BRAVOPASSXXX.exp). Set the material thickness
to 3 points and the maximum sewing speed to 1200 s.p.m. (1000 s.p.m for
BRAVO). Then sew AMPASS or BRAVOPASS out on a piece of cotton broadcloth
(Melco PN 344754-01) hooped with one piece of standard 2.0 oz. backing
material (Melco PN C20162210).
From the beginning of the test, if the problems are addressed as described
below, their frequency should become much less as you continue the test.
(Note: the most challenging is the small lettering; quite often, resolving
thread breaks in this area will solve any thread break problems.) As you
sew AMPASS or BRAVOPASS, use the following table to troubleshoot problem