Brother TZ1-B652 Instruction Manual

To adjust the crab (feed dog timing or movement) of the Brother TZ1-B652 sewing machine, follow these general steps:

1. Unplug the Machine: Ensure the machine is powered off and unplugged for safety.

2. Remove the Needle Plate: Unscrew and lift off the needle/throat plate to access the feed dogs.

3. Locate the Feed Mechanism: Find the feed dog drive mechanism under the machine, usually connected by a cam or linkage system.

4. Check Feed Dog Height:
- Rotate the handwheel to bring the feed dogs to their highest point.
- Measure the height; it should typically rise 1.0–1.2 mm above the needle plate.
- If needed, loosen the screws on the feed dog bar bracket and adjust the height.

5. Adjust Feed Timing (Crab Adjustment):
- Turn the handwheel toward you until the needle is at its lowest point.
- The feed dogs should begin to rise slightly just as the needle starts to ascend.
- If the timing is off, loosen the screws on the feed driving eccentric or timing cam.
- Rotate the cam slightly to synchronize feed dog motion with needle movement.
- Retighten screws securely.

6. Test the Machine: After adjustment, replace the needle plate, plug in the machine, and test on scrap fabric to confirm correct feeding.

Improper adjustment can cause skipped stitches or fabric feeding issues. If unsure, consult a qualified technician.

This answer is automatically generated

To adjust the crab (feed mechanism) of the Brother TZ1-B652 sewing machine if it is skipping stitches or fabric is not feeding properly, follow these steps:

1. Turn off the machine and unplug it for safety.

2. Remove the needle plate and presser foot to access the feed dogs (the crab).

3. Check the feed dog height:
- Manually turn the handwheel to bring the feed dogs to their highest point.
- The feed dogs should rise above the needle plate by about 0.8–1.2 mm.
- If too low or too high, adjust the feed dog height screw under the needle plate.

4. Check feed dog timing:
- Turn the handwheel and observe when the feed dogs move forward and down.
- They should begin to drop just as the needle starts to rise after the lowest point.
- If timing is off, loosen the feed mechanism cam on the lower shaft and adjust its position.

5. Align feed dog movement:
- Ensure the feed dogs move evenly front to back and side to side.
- Use the adjustment screws on the feed mechanism linkage to correct uneven motion.

6. Test feed balance:
- Reassemble the parts and sew on test fabric.
- If fabric still skips, check presser foot pressure and ensure the needle is not bent or dull.

If problems continue after these adjustments, professional service may be needed.

This answer is automatically generated