January 13th, 2013, 06:07 PM
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#4 (permalink)
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Senior Member
- Join Date:
- Apr 2010
- Posts:
- 261
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Re: Tajima 4 head 291 error
generaly for all Tajima machines with this kind of sistem for upper thread breakage(spring):
above the thread check spring is an plate.
between this plate and the spring is an electrical contact.
when the machine run this contact is ON-OFF,ON-OFF...and give this information to tension base card.
in case of thread breakage the spring don t move,cntact is ON and the machine stop.
if the spring force is to big and thread tension to lose the spring don t move and you will have false thread breakage.
to adjust spring force put an -screwdriver in the midle of button and turn right or left to increase or decrease spring force.
to be sure if the spring is the problem or not:
adjust the spring force.
take off the plate(above spring) and clean contact surface,and the back side plate surface
clean the metal part on tension base(where you put the plate fixing screw)
clean spring contact surface.
make test.
try for one head,one neadle first.
if not the spring is the problem:
clean with dry contact cleaner(spray)and compress air:
tennsion base card connector,cable connectors between tension base card and the back side of the machine.
cable from tension base goes in to an joint card.
clean joint card connectors.
if don t work maibe is necessary to make machine reconfiguration or to install again software.(considering all cards OK)
but about this tommorow, now is to late(1 AM)
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