Jack JK-T781e Machines

Cause: The tension of the tension controller No.2 is too tight
Solution: Decrease the tension of the tension controller No.2

Cause: The tension or the stroke of the take-up spring is too great
Solution: Decrease the tension or the stroke of the take-up spring

Cause: Blade point of sewing hook has burr or scratches
Solution: Buff the blade point of the sewing hook or replace the sewing hook.

Cause: Poor timing of the sewing hook
Solution: Readjust the hook's timing by the timing gauge

Cause: The thread path has scratches
Solution: Buff the thread path by cloth files, etc.,

Instruction: Protected Stitches

Range/Unit: 1~990

Default: 400

Key Usage: Up / Down Arrow

Description: Required number of needles coordinating with the cutter speed

(spm)

Instruction: Maximum Rotating Speed (SPM)

Range/Unit: 10~360

Default: 300

Key Usage: Up / Down Arrow