Motorola HE-8000, LH4-B800E Adjusting the lower thread clamp timing, Adjusting the bobbin presser

10. STANDARD ADJUSTMENTS

10-8. Adjusting the lower thread clamp timing

(5)

(2)

(3)

Loosen the set screw (2) of the feed arm support (1), and then align the reference line A on feed guide shaft B (3) with the edge of the feed arm support (1). When the feed mechanism moves by approximately 6 - 7 mm, the opening plate (4) will move and the lower thread retainer (5) will open. Move feed guide shaft B (3) to the left or right to change the opening

(4)

A

timing.

(1)

2184Q

10-9. Adjusting the bobbin presser

(2)

A

(3)

(1)	(4)
	(5)	2185Q

After the machine head has returned to the home position, press the RESET key before carrying out this adjustment.

1.Loosen the set screw (1), and then adjust so that the bobbin presser (2) goes into the hole in the bobbin case (3).

2.Check that the work clamp is at the home position, and then loosen the nut (4) and turn the screw (5) to adjust the clearance A between the bobbin presser (2) and the edge of the bed to approxi- mately 12.5 mm.

10-10. Adjusting the needle up stop position

(6)

(3)

(4)

	(1)
(2)	(5)

2186Q

The needle up stop position is adjusted so that the index mark (2) on the machine pulley (1) is inside the mark (4) on the belt cover (3).

If adjustment is necessary, loosen the screw (5) of the machine pulley (1) and adjust the position of the machine pulley (1). The machine pulley (1) stops later if it is turned clockwise, and it stops later if it is turned counter clockwise.

The screw (6) is a screw for detecting the machine stop position, and should not be loosened.

NOTE:

If the index mark (2) is not inside the mark (4) when the sewing machine is started, error code “E-02” will be displayed. Turn the machine pulley to move the index mark (2) to the correct position and then start the sewing machine.

76 HE-8000