SewTech News


On certain models the roller pin #18 (fig 1)has begun to work free, (unscrew), and back out of the take-up lever drive lever (B type) #30

We have just begun to notice this problem, the first time, on a 15 head, was chalked up to operator error, but when we returned several months later to repair another head on this same machine we noticed the damage to the inside of the needle bar case near the last needle. (fig 2) Upon checking the other heads we found that almost all of the pins were coming out, and that several heads were damaged by the pin hitting the inside of the needle bar case. Further, we found that several of the drivers were damaged as well. In the last several weeks I have also found several singleheads with the same problem. Two times the customer and their respective tech support diagnosed the problem as a color change motor and/or encoder. Both times the problem was in reaching the #12 needle.

Corrective Measure’s (owner/operator)

I have not been able to ascertain whether or not there is an official TTI from Tajima as of yet. For now I suggest you check all machines with the driver type B to see if the roller pin is beginning to work free. Simply position the head on or around the 10 needle on the 12 or 15 needle machines, or 6 or 7 needle for a 9 needle head. Look in from the left, into the tunnel created by the take-up driver cams and locate the roller pin on the take-up driver. (this is not easy, but persevere, you can see it.) You are looking for a small standard slot screw head. A very narrow blade screwdriver is needed. If the screw (roller pin) is not flush with the driver arm, make it so.

Corrective Measure’s (techs)

Remove the head(s) and then the roller pin. Clean the threads and the driver arm. Place some Loc-Tite (R) on the threads and re-insert. Check annually.