FAQ : INTERLOCK

  • Attachment LFD - The sewing thread tension is not equal.

Adjustment:

  • Adjust the tension of the needle thread
  • -- The skipping stitches of the left looper thread.

Adjustment:

  • Change the new left looper. (The top of the left looper is worn. When fix and replace, the protrusion of the looper top shall not be worn.
  • -- The needle thread is not tight enough.

Adjustment:

  • Adjust the upper thread tension or looper thread tension.
  • -- Machine does not operate at high speed

Adjustment:

  • Adjust the looper thread tension or upper thread tension.
  • -- The looper thread is not tight enough.

Adjustment:

  • Use the sewing speed control keys to set the high speed.
  • -- The skipping stitches of the right looper thread.

Adjustment:

  • When the right looper turn right and backward, the distance to the needle has to be 0.1 mm, which is using the correct right looper. (The appropriate right looper for each type, such as single need, 2 needles, materials, and thin fabrics, are included)

Adjustment:

  • Because the correlationship of the left/right position of the right looper while assembling and the up/down moving position of the right looper seat, adjust the movement path of the looper. When the right looper descends, decrease the descending amount from left needle to right needle.
  • -- Machine does not operate when power is turned on and treadle is
  • -- Skipping stitches of the needle thread.

Adjustment:

  • Please select the needle and the thread number that are suitable for the sewing materials.

Adjustment:

  • Change a new needle.

Adjustment:

  • Adjust the clearance between the needle and the left looper tip to be ±0 mm.

Adjustment:

  1. When the small spring doesn’t function, pull the spring a little to give it more tension. (NOTE: The thread will be broken if pulling the spring too much.)
  2. If there is any groove or deep scrape on the tension adjusting disc, please change a new adjusting disc.。

Adjustment:

  1. Loosen all the needle thread tension a little.
  2. Adjust the line (A) of the needle thread to the highest position, so that the released amount of the needle thread from thread hooking will decrease.
  3. Lean the line (C) to left a little to increase the released amount of the looper thread.
  • -- Needle broken

Adjustment:

  1. Loosen all the needle thread tension a little.
  2. Adjust the line (A) of the needle thread to the highest position, so that the released amount of the needle thread from thread hooking will decrease.
  3. Lean the line (C) to left a little to increase the released amount of the looper thread.

Adjustment:

  • If it is incorrect, install the needle correctly.

Adjustment:

  • If the needle breaks, search for all pieces until the whole of the needle is found.
  • - The tip of the needle is damaged.

Adjustment:

  • When the needle moves close to the upper dead point, push the needle forwards a little by finger. See whether the top of the needle touches the right looper or not. Then adjust the height of the needle position or the moving position of the right looper.

Adjustment:

  • The needle guard inside must leave from the needle before the top of the left looper reaches the right side of the needle. The distance between the front needle guard to the needle is about 0.2 mm.

Adjustment:

  • When assembling the needle plate, pull it forwards a little so that the space of part A can be larger.
  • -- Broken thread and rough/uneven stitch

Adjustment:

  • Use emery cloth to polish the surroundings of the thread hole.

Adjustment:

  • Change a better thread to balance the threads.
  • - Machine stops during sewing.

Adjustment:

  • Use the sewing speed control keys to set the high speed.

Adjustment:

  • Check the power supply. (If the power cord is too long or too many appliances are being run from a single outlet, this may cause voltage drops.)
  • -- The thread does not come out when doing chainstitch.

Adjustment:

  • Adjust the cam to an appropriate position.

Adjustment:

  1. Adjust the spring strength
  2. Polishing or changing a new one
  • - Cannot seperate the thin and thick threads.

Adjustment:

  • Clean the stuck part so that the oil can reach the cam.

Adjustment:

  • Adjust to the proper tension, but should not be too loose.
  • -- The oil does not splash.

Adjustment:

  1. Relock it to the correct position
  2. Reassemble the gear of the pump to the main shaft and adjust the position.

Adjustment:

  1.  Clean the lints and change the oil releasing screw.
  2. Change a new filter
  3. Clean the dirt or change a new one
  4. Use the iron wire to clean through the oil path.
  • --Loud noise, strange noise.

Adjustment:

  1. Clean the copper glue from the copper cover of the main shaft and readjust.

Adjustment:

  • Use the fixture to add pressure on the gear of the pump, and keep the pump running 3-5 minutes.

Adjustment:

  • Change a new one or to polish the contacting surface so that the clearance is smaller.

Adjustment:

  • Adjust it based on the norm.
  • --Loud noise, strange noise.

Adjustment:

  1. Clean the copper glue from the copper cover of the main shaft and readjust.

Adjustment:

  • Use the fixture to add pressure on the gear of the pump, and keep the pump running 3-5 minutes.

Adjustment:

  • Change a new one or to polish the contacting surface so that the clearance is smaller.

Adjustment:

  • Adjust it based on the norm.
  • --Skipping stitches occur while sewing.

Adjustment:

  • If the needle tip is bent or broken, replace it.

Adjustment:

  • If it is incorrect, install the needle correctly.

Adjustment:

  • If it is incorrect, thread the thread correctly

Adjustment:

  • Adjust the presser foot pressure.

Adjustment:

  • Replace the needle with a needle that is one rank thicker

Adjustment:

  • Adjust the height of the presser foot.

Adjustment:

  • Adjust the tension of the thread take-up spring.
  • - Skipping stitches or unraveled thread at sewing start.

Adjustment:

  • Sharpen the fixed knives, or replace the fixed and moveable knives if necessary.

Adjustment:

  • Try to use a needle with a count that is one lower than the current needle.

Adjustment:

  • Use the slow start feature.
  • -- Uneven seam.

Adjustment:

  • Adjust the presser foot pressure.

Adjustment:

  • Adjust the feed dog height.
  • --Large degree of puckering (excess tension)

Adjustment:

  • Make the needle thread tension as weak as possible.

Adjustment:

  • Make the looper thread tension as weak as possible.

Adjustment:

  • Make the thread take-up spring tension as weak as possible.

Adjustment:

  • Lower the thread take-up spring as low as possible.

Adjustment:

  • Adjust the presser foot pressure.

Adjustment:

  • Use the sewing speed control keys to gradually reduce the sewing speed.
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