HQ Stch
Technical Bullen #0001
02/16/17
This bullen is provided to give HQ Stch technicians
and salespeople addional informaon on the HQ
Stch 710 pre-tension assemblies. The goal is to
increase understanding of the pre-tensions to help
prevent poor bobbin winding and sewing results due
to improper threading of the pre-tension assemblies.
Back Ground Information:
The HQ Stch 710 has two pre-tensions. Both are
used for bobbin winding. Only the front pre-tension
is used for sewing. If the machine is not threaded
properly the bobbin winder will not wind bobbins
rmly and the machine will not sew properly. Also
if someone improperly adjusts the bobbin winder
pre-tension assembly it will cause sewing and tension
issues.
Make sure to pull the thread to the front unl it
clicks into the rst sewing pre-tension and then back
around the le thread guide to the bobbin winding
pres-tension. Use both hands to pull the thread
rmly into the pre-tensions as shown in the winding
the bobbin secon of the user Instrucon Book.
You should feel a good pre-tension on the thread
when winding a bobbin or the machine is either not
threaded correctly or the pre-tension has been mal
adjusted by someone, perhaps inadvertently.
In the following picture the machine is threaded for
bobbin winding with the covers removed to show the
thread path clearly. It is important to note that the
thread is going through both the back bobbin winder
pre-tension and the front sewing pre-tension.
HQ Stch 710 Pre-Tension Informaon
Prevenng Bobbin Winding and Sewing Issues
The HQ Stch 710 machine comes with the bobbin
winder pre-tension set from the factory to wind
a bobbin rmly and evenly from top to boom.
Should one mistake the pre-tension assembly
screw as a top cover fastening screw and ghten or
loosen the screw, this may render the pre-tension
ineecve and cause poor sewing results.
When one mistakenly adjusts the pre-tensioner
assembly screw it will not only eect how evenly the
bobbin winds, but also how rmly the bobbin winds.
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