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30

MC450e

Remove the setscrews (A).

Pulling down the gear set plate and the gear (A), remove 

them.

Set a new gear (A) on the gear set plate.

Attach the gear set plate with the new gear (A) on the 

X-carriage and temporarily tighten the setscrews (A).

Move the gear (B) so that the gear (B) comes in contact 

with the gear (A).

Move the gear (B) in the direction of the arrow so that 

the gear (B) comes in contact with the gear (C).

Tighten the setscrews (A) firmly.

Be sure that there is no play between the gears (A) and 

(B), nor between the gears (B) and (C).

Slide the Y-carriage by hand and check if Y-carriage 

moves smoothly.

Setscrews (A)

Gear (B)

Gear (A)

Gear (C)

Gear set plate

Attach the covers

Attach the bed cover, base plate and thread cutter cover 

follow the above procedure in reverse (refer to pages 1, 

2, 3).

Replacing the Gear of the X-carriage

Содержание MC400E

Страница 1: ...SERVICE MANUAL MODEL MC400E...

Страница 2: ...ase mechanism 15 Height of the embroidery foot 17 Presser foot lifter detecting switch 20 Automatic thread cutter 21 Remaining bobbin thread sensor 22 Hoop position 23 X sensor position 25 Y sensor po...

Страница 3: ...erse Face cover Setscrew Replacing the thread cutter cover To remove 1 Remove the cap and setscrew A Stand the machine so the handwheel side comes to the underside of the machine Insert the screwdrive...

Страница 4: ...ng the base plate To remove 1 Stand the machine so that the handwheel side comes to the underside of the machine 2 Remove the 6 setscrews A and remove the bottom plate Setscrews A Setscrews A Bottom p...

Страница 5: ...placing the bed cover To remove 1 Turn the power switch on to move the carriage to the stored position then turn the power switch off 2 Remove the setscrews A and the needle plate Remove the base plat...

Страница 6: ...mbroidery pattern 1 w to move the carriage to the starting position then turn the power switch off Setscrew A q w 2 Loosen the setscrew A Setscrews B 3 Remove the 2 setscrews B near the spool pin 4 Re...

Страница 7: ...Setscrew E Setscrew F 3 Remove the 2 setscrews B and 3 setscrews C Y carriage supporter 4 Remove the 2 setscrews D 5 Loosen the setscrew E 6 Loosen the setscrew F and shift the Y carriage supporter up...

Страница 8: ...Remove the setscrew A Setscrew A Setscrew B 2 Remove the setscrew B Remove the carriage cover To remove 3 Follow the above procedure in reverse Setscrew A Replacing the Belt Cover To remove 1 Remove t...

Страница 9: ...ust the position of the needle 5 Loosen the setscrew B 6 Move the needle drop adjusting plate laterally to adjust the position of the needle 7 Tighten the setscrews 8 Attach the face cover NOTE Check...

Страница 10: ...tip of the rotary hook meets the right side of the needle while holding the hand wheel so the needle bar does not move 6 Tighten the setscrews 7 Attach the bobbin holder needle plate and presser foot...

Страница 11: ...surface of the rotary hook at 1 6 to 2 0 mm 5 Tighten the setscrews Be sure that the groove of the needle is facing right in the front 6 Attach the bobbin holder needle plate and presser foot Replace...

Страница 12: ...clearance between the test pin and the tip of the rotary hook to 0 10 to 0 05 mm by moving the rotary hook set plate up or down 5 Tighten the setscrews A B and C firmly 6 Check the backlash between th...

Страница 13: ...of the hook 4 Turn the lower shaft bushing eccentric in the direction A if the gears do not turn smoothly Turn the lower shaft bushing in the direction B if the rotary play is larger than 0 8 mm 5 Ti...

Страница 14: ...connect the connectors to the printed circuit board A except printed circuit board L2 and L3 connectors The carriage will not return to the home position after turning the power switch on if the X mot...

Страница 15: ...ode Press Phase key Phase key Setscrew C Even Sensor Upper shaft shield plate Fig 1 Bight sensor Upper shaft shield plate Bight shield plate Start stop button Printed circuit board F 7 Loosen the sets...

Страница 16: ...t at 3 4 6 The upper thread tension should be 59 to 67 grams when pulling the thread at the speed of 110 mm sec If not adjust the needle thread tension Foot Sensor Tension key Start stop button Pullin...

Страница 17: ...st and adjust the thread tension release adjusting plate position then tighten the setscrew B Be sure that the tension release lever touches to the presser foot lifter as shown in Fig C when tightenin...

Страница 18: ...stall the needle threader plate line the groove up with the pin B and push it up to snap it To adjust 1 If the hook on the threader plate touches the left or right side of the needle eye loosen setscr...

Страница 19: ...d you to lower the embroidery foot at its lowest position 3 Loosen the setscrew A on the presser bar supporter 4 Place the 1 2 mm spacer block between the presser foot and the needle plate 5 Fix the p...

Страница 20: ...the connectors Setscrews B Setscrews A Setscrew B Printed circuit board A Case Disconnecting LCD Module Flexible PCB Flexible PCB Lift up the clamp to unlock Close the clamp to lock Touch panel Black...

Страница 21: ...pages 1 3 and 4 2 Disconnect the connectors for printed circuit board F from the printed circuit board A 3 Remove the 2 setscrews A and remove the printed circuit board F To attach 4 Follow the above...

Страница 22: ...nsion gear Move the thread release plate to the right so that the thread release plate touches to the thread release lever lightly Tighten the setscrew A see Fig A B and C 5 Press Free key Engage the...

Страница 23: ...er motor is initialized and moving cutter moves to its home position automatically 4 The distance between the edge of moving cutter and the end of thread cutter plate slit should be 0 8 to 1 6 mm If n...

Страница 24: ...holder counterclockwise so that the knob fits to the stopper in the hook race 6 Press Key and read Key value 7 Repeat the procedure 5 to 6 above few times Press Empty when the same Key value is indic...

Страница 25: ...Adjust key 5 The hoop moves to its start position Default position X 1000 Y 1400 6 Adjust the hoop position so that the needle drops to the center of the template hole Press or key to adjust the hoop...

Страница 26: ...ers as necessary Unplug the connectors from the printed circuit board A Remove the carriage unit To attach 4 Follow the above procedure in reverse NOTE Adjust the Y carriage supporter refer to page 27...

Страница 27: ...connect the connectors to the printed circuit board A except printed circuit board L2 and L3 connectors 5 Remove the carriage cover refer to page 6 6 Turn the power switch ON while pressing the start...

Страница 28: ...connectors 5 Remove the carriage cover refer to page 6 6 Turn the power switch ON while pressing the start stop button Press SM Init key 7 The gap between the hoop attaching base and Y shaft fixing p...

Страница 29: ...istance between the top of the rail and the lower edge of Y carriage to 14 3 0 3 mm 3 Tighten the setscrew A 4 Attach the carriage cover Y carriage supporter Setscrew A 14 3 0 3 mm Lower edge of Y car...

Страница 30: ...m plate bed cover and rear cover refer to pages 1 2 3 and 4 2 Remove the connector from the switching power supply 3 Remove the setscrew A and B to remove the switching power supply To attach 4 Follow...

Страница 31: ...t removing the front and rear cover may require skills If you are not confident remove the base and front cover to replace it 2 Remove the setscrews A and the DC motor To attach 1 Pass the DC motor co...

Страница 32: ...Move the gear B in the direction of the arrow so that the gear B comes in contact with the gear C Tighten the setscrews A firmly Be sure that there is no play between the gears A and B nor between th...

Страница 33: ...fore oiling Do not oil any parts other than as explained in this section Use good quality sewing machine oil One or two drops of oil is sufficient Remove excess oil otherwise it may stain fabric Remov...

Страница 34: ...the thread cutter cover refer to page 1 Oil the arrow point as indicated Oil the lower shaft supporter front Stand the machine so that the handwheel side comes to the underside of the machine Remove t...

Страница 35: ...Oiling the Machine 3 Oil the Y carriage Remove the carriage cover refer to page 6 Oil the arrow points as indicated in the illustration Oil the X carriage Oil the arrow point felt inside of the carri...

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