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RH-981A SERVICE MANUAL Please read this manual before using the machine. Please keep this manual within easy reach for quick reference. ELECTRONIC EYELET BUTTON HOLER...
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This service manual is intended for RH-981A; be sure to read the RH-981A instruction manual before this manual. Carefully read the “SAFETY INSTRUCTIONS” below and the whole of this manual to understand this product before you start maintenance. As a result of research and improvements regarding this product, some details of this manual may not be the same as those for the product you purchased.
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Furthermore, do not excessively bend the cords or secure them too Contact your Brother dealer or a qualified electrician firmly with staples, otherwise there is the danger for any electrical work that may need to be done.
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Ask your Brother dealer or a qualified electrician to Use only the proper replacement parts as carry out any maintenance and inspection of the specified by Brother.
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The following warning labels appear on the sewing machine. Please follow the instructions on the labels at all times when using the machine. If the labels have been removed or are difficult to read, please contact your nearest Brother dealer. Safety devices...
4-9. Fine adjustment of knife position......54 3-8-1. Eliminating end play of the thread take-up 4-10.Adjusting the sideways movement on the arm ...........27 of the cutter lever..........55 3-8-2. Applying grease to the ends of the thread 4-11.Adjusting the height of the throat plate.....55 take-up spring..........27 RH-981A...
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4-24.Adjusting the position of the lower thread presser (-02, -52 specifications) ........75 4-25.Adjusting the rotating centers of the needle bar and the looper base .....76 4-26.Adjusting the needle bar stop position.....77 RH-981A...
2. When the pulley (5) rotates in the direction of the arrow, its motion is transmitted to the upper shaft timing pulley (6), the timing belt (7), and the lower shaft tension pulley (8), and the lower shaft (9), causing the lower shaft cam (10) to turn in the direction of the arrow. RH-981A...
2. The thread take-up cam (4), which is attached to the needle bar gear (3), moves the thread take-up (6) via the thread take-up cam roller (5). 3. The thread take-up cam roller (5) is always kept in contact with the cam (4) by the thread take-up spring (7) attached to the thread take-up (6). RH-981A...
3. When the vertical shaft T pulley U assembly (7), which is attached to the driving looper shaft assembly (5), rotates, the motion is transmitted to timing belt U (8), and the needle bar block assembly (9) that rotates the needle bar (10). RH-981A...
2. The Y-timing belt (18) is secured by the Y-driving shaft holder (19) and the belt holder (20), and that moves the Y shaft (21). 3. The linear bush (23), which is fitted in the ball bearing (22), is fitted in the Y-guide shaft (24) to move the feed bar (13) in the Y direction. RH-981A...
* The work clamp mechanism is activated by independently-operated left and right cylinders, that can equalize the pressure of the work clamp. The pressure of the work clamp is always applied to the material equally even when the material thickness changes. RH-981A...
6. When the cylinder 16 X 15 assembly (2) is not pressurized, the work clamp plate (12) is moved in the direction of b by the opening spring (17). At this time, the stopper (13) of the work clamp plate (12) makes contact with the stopper plate (18). * The c indicates the movement of the work clamp plate (12). RH-981A...
3. When the lower shaft cam (4) rotates in the direction of the arrow, the looper link assembly (2) is rocked via the looper cam roller (3). 4. The looper driving shaft (6) moves up and down due to the motion of the looper link assembly (2). RH-981A...
2. When the lower shaft cam (4) rotates in the direction of the arrow, the spreader cam lever (2) is rocked via the spreader cam roller (3). 3. The spreader link shaft (7) moves up and down due to the motion of the spreader cam lever (2). RH-981A...
(5) secured to the loop base (4) regarded as the pivot. 3692Q 3693Q 3. The rocking motions of the LS-holder bracket (6) and the spreader differential cam (10) cause spreader L (11) to rock. 4. In the same way, spreader R (12) is rocked. RH-981A...
Use only the proper replacement parts as result in injury. specified by Brother. Be sure to wear protective goggles and gloves If any safety devices have been removed, be when handling the lubricating oil and grease,...
(6), including the Y motor unit. 2-3. Lubrication mechanism Hole Oil tank 3699Q 1. Remove the wick supports (1) and (2). 2. Remove the wicks (3) and (4) from the hole. 3. Remove the two screws (5) and wick support L (6). RH-981A...
4. Loosen the two set screws (10) of the set collar (9) and the two set screws (11), and remove the looper link support shaft (12). 5. Slide the lower shaft cam (13) in the direction of the arrow, and remove the looper link (14). RH-981A...
4. Remove the four bolts (9) and the motor base (10). 5. Loosen the bolt (12) of the vertical shaft T-pulley U assembly (11) and the two set screws (14) of the set collar (13). 6. Remove the driving looper shaft assembly (15) downward. RH-981A...
Loosen the screw (10) of the looper pulley assembly (9), and remove the looper base (11) in the direction of the arrow. * Be careful not to drop the two ball bearings (12) when removing the looper pulley assembly (9). RH-981A...
2. DISASSEMBLY 2-7. Needle bar, thread take-up, and zigzag mechanisms 3708Q 3709Q 3710Q 3711Q RH-981A...
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1. Remove the spring (39) and the two rubber caps (40). 2. Loosen the two set screws (41) and the two set screws (43) of the set collar (42), and remove the support shaft (44). 3. Remove the thread take-up lever assembly (45). RH-981A...
1. Loosen the two set screws (2) of the lower shaft tension pulley assembly (1). 2. Loosen the two set screws (4) of the lower shaft cam (3). 3. Loosen the two set screws (6) of the set collar (5). 4. Remove the cam shaft (7) in the direction of the arrow. RH-981A...
2. Loosen each set screw (2 each) of the needle bar gear (3), the zigzag cam (4), and the upper shaft tension pulley assembly (5). 3. Pull the upper shaft (6) in the direction of the pulley to remove it. The upper shaft unit will come off. RH-981A...
7. Loosen the two set screws (19), and remove the cylinder support shaft (20) and the cutter cylinder (21). 2-13. Zigzag fork mechanism 3717Q 1. Remove the two nuts (1), and the zigzag connection rod assembly (2). 2. Remove the nut (3), the zigzag fork support pin (4), and the zigzag fork (5). RH-981A...
Use only the proper replacement parts as in injury. specified by Brother. Be sure to wear protective goggles and gloves If any safety devices have been removed, be when handling the lubricating oil and grease, so...
8. Pass link shaft B (17) with its slit facing the right, through the slot of link A (5), and the hole in the cutter lever (12), and tighten the set screw (18). 9. Wind the wick (19) around the right of link C (4), and insert the end of the wick into the lubrication hole in the cylinder rod shaft (9). RH-981A...
(6) by tightening the set screw which comes first when rotated in the rotation direction, against the screw flat. Then tighten the other set screw. 7. Temporarily tighten the pulley with its screw flat facing the front. RH-981A...
(3) are as shown in figure 1, loop the timing belt over the lower shaft tension pulley assembly (3). 3-4-1. Adjusting the timing belt Use a screwdriver or similar tool to press the notch of the tension pulley arm assembly (1) with a force of 39.2 N, and attach the tension pulley assembly. 3723Q RH-981A...
(2) so that the clearance with the bed is 11 mm. 2. Lower the thread trimmer lever hammer (1), and adjust the set screw (3) so that the clearance with the bed is 6 mm. 3726Q RH-981A...
(2). 3727Q Knife bracket Insert a bar with a diameter of 4 mm into the hole (1) in the knife bracket to fix the knife bracket position, and tighten the bolts (2) to (6). 3728Q RH-981A...
* The driving gear shaft (1) should be turned in the direction where its lubrication hole is moving upward. 2. While pressing the set screw collar (2) toward the pulley so that the driving gear shaft (1) has no end play, tighten the two set screws (4). RH-981A...
(3) and the spring hook (4). 3732Q 3-8-3. Eliminating end play of the needle bar driving lever Adjust the position of the set screw collar (2) to eliminate end play of the needle bar driving lever assembly (1). 3733Q RH-981A...
(4) as shown in the above figure, and pass the zigzag rock shaft (5) through the arm from the right. At this time, insert a wedge or similar tool into the split of the zigzag crank (1) for easier adjustment. Note: Do not fail to attach the washer (3). RH-981A...
(2), pass the wick (3) through the needle bar driving lever assembly (1), and fit the cap (4). 2. Attach the needle bar level feed link (5) to the needle bar yoke (2) vertically, and turn it 90°. 3738Q RH-981A...
5. Insert the needle bar felt (14), the needle bar clamp (5), the needle bar level feed link (16), the needle bar block clamp (17), the needle bar level feed link (18), and the needle bar block collar (19), through the needle bar assembly (13) in this order. 3740Q RH-981A...
(4) using the two set screws (3) so that the needle bar can move smoothly. Note: Position the needle bar assembly (4) so that the holder plate A (5) will face the front when the set screws (3) are facing the front. 3743Q RH-981A...
2. Set the height of the needle bar (2) to approx. 62 mm, eliminate end play between the two needle bar clamps (3) and the needle bar level feed link (1), and tighten the two screws (4). Approx. 62 mm 3746Q RH-981A...
(8). Align the reference line (10) with the top surface of the spreader link base (9), and tighten the screw (11). 4. Attach the L-tension stud (12), the thread guide discs (13), pre-tension spring B (14), and the tension nut (15) to the looper base (1). RH-981A...
(1) through timing belt U (10). 4. Attach the tension pulley arm U assembly (11) while it is being pulled by a force of 19.6 N. * Deflection in the center of span: 3 ± 0.5 mm when 4.9 N is applied. 3749Q RH-981A...
Adjusting the timing belt tension Attach the timing belt D while the tension pulley arm D assembly is being pulled by a force of 68.6 N. * Deflection in the center of span: 6 ± 0.5 mm when 4.9 N is applied. RH-981A...
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2. Align the match mark in the looper base (3) with that in the bed, as shown in the figure. 3. Orient the needle bar gear (4) in the direction shown in the figure, and align it with gear support B (5). 4. Tighten the bolt (2) of the vertical shaft T-pulley U assembly (1). RH-981A...
2. Wind the wick (4) around the boss of the looper link (3). Be sure to pass the two wicks (5) under the wick (4). 3. Wind the wick (6) around the spreader driving lever (7), as shown in the figure. RH-981A...
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Position the screw flat of the upper shaft at the top (where the needle is at its lowest position), and tighten the two set screws (17) of the lower shaft tension pulley assembly (13). 8. Attach the two plate springs (18) to the looper link (3) using the two spring washers (19) and the two bolts (20). RH-981A...
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10.Pass the looper link support shaft (24) through the spreader driving lever (22) and the set screw collar (23), and secure them using the two set screws (25). (The split in the shaft should be facing the right.) 11. Tighten the two set screws (26) of the set screw collar (23) to eliminate the end play. RH-981A...
5. Using a pair of tweezers, insert the wick (9) into the hole in the oil tank. At this time, insert the oil tube into the hole, as shown in the figure. 6. Pass the wick (4) under the felt (10). 7. Push the felt (10) into the lubrication hole in the thread take-up lever (11). RH-981A...
1. Oil is supplied to the driving gear shaft (2) through the wick (1). 2. The wick (4), which is wound around the boss of the pin (3), makes contact with the felt (5), and oil is supplied to the pin (3), the eccentric wheel (6) and the driving rod (7). RH-981A...
2. Engage the idle gears (2) and (4) with the X racks (1) and (3), respectively, and attach the motor support (6) while pressing it. 3. Tighten the two set screws (5) so that there is no end play of the idle gear (4). RH-981A...
* The belt tension can be adjusted when the Y-feed base is still attached to the bed. 3764Q Loosen the two bolts (2) of Y-support L (1), and use the bolt (3) to adjust the belt tension. The tension in this case should be the same value as that above. RH-981A...
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Remove the Y-feed base (1). Adjustment should be carried out with the driving gear and the idle gear treated as a unit. 3766Q Adjust the backlash between the driving gear (2) and the idle gear (3) when they are engaged under the weight of pulse motor Y (4) (as shown in the figure above). Tighten the four bolts (5). RH-981A...
2. Insert the Y-feed guide shafts (4) into the X-feed shaft holder R (5) and the X-feed shaft holder L assembly (6) and the feed bracket (7), and tighten the four set screws (8). 3. Move the feed bracket (7) in the X direction a few times. 4. Tighten the four bolts (2) and the two set screws (3). RH-981A...
3. Tighten the set screw (5) in the V-groove in the upper shaft, and attach the pulley assembly (6). Then tighten another set screw (7). * The set screw (5) should be tightened in the front hole which comes first when the pulley is rotated in the rotation direction. 4. After attaching the synchronizer, check the machine torque. RH-981A...
1. Switch to the input check mode. 2. Adjust the height of the safety switch (1) using the two screws (2) so that the LED does not go off even if the machine head is lowered and the bed is shaken up and down. RH-981A...
Ask your Brother dealer or a qualified electrician to carry out any maintenance and Use only the proper replacement parts as inspection of the electrical system. specified by Brother. Turn off the power switch and disconnect the...
Adjust the clearance between the throat plate (1) and the needle plate L in the same manner. * If the maximum stitch width correction amount is set to 2.0 mm, adjust the distance between the throat plate and the needle plate to more than 2.0 mm. RH-981A...
3. Press the start switch. The feed bracket will move and then the left and right work clamp plates will open. 4. Use calipers to measure the distance b. 5. The difference between a and b is the opening amount. (Opening amount = a - b) RH-981A...
The work clamp should be centrally positioned as to the needle movement. 3776Q [Back and forth movement] Loosen the bolt (1), and adjust the position of the clamp arm (2). [Sideways movement] Loosen the two screws (3), and adjust the position of the clamp lever (4). RH-981A...
3. Loosen the two screws (1), and move the Y-sensor setting plate (2) in the direction of the arrow. 4. Repeat the above steps from 1. * The Y-axis home position can be adjusted in increments of 0.05 mm. Note: If the clearance is too great, the movable knife and the throat plate may hit each other. RH-981A...
(5) in the direction of the arrow. 4. Return the machine head to its original position. Repeat above steps from 1. * The home position of the looper base can be adjusted in increments of 0.45° RH-981A...
2. Loosen the bolt (7), which secures the knife bracket and the knife bracket guide. 3. Turn the adjusting screw (6). Inclination of the knife can be adjusted by rotating the knife bracket and the knife bracket guide, regarding the pivot (8) as the center. 3790Q RH-981A...
Loosen the screw (3), turn the set screw (4), and adjust the height of the throat plate (1). Note: The set screw (4) is adjusted to maintain the height of the throat plate when it is removed and re-installed. RH-981A...
2. The clearance between the right looper (9) and the right spreader (1) should be as small as possible. 3. If adjustment is necessary, loosen the screw (10) and then move the eye looper (8) and right looper (9) up or down. RH-981A...
5. If adjustment is necessary, turn the looper base (6) in the direction indicated by the arrow in the illustration, loosen the screw (7), and then move the looper link clamp (8) up or down to tilt the LS-holder bracket (9) to the left or right (in the direction of the arrow). RH-981A...
* Basically, the machine is assembled so that the hole (7) of the lower shaft cam (4) is aligned with the hole (9) of the lower shaft base (8) when the needle bar is at its lowest position and at the inside sewing position. RH-981A...
If the clearance is not uniform, adjust the turning center for the needle bar. (This adjustment is made at the time of shipment from the factory.) * After making the adjustment in step 1. above, carry out the adjustment procedure given in "4-18. Adjusting the spreader mounting positions". RH-981A...
(5) is aligned with the tip of the right looper (6). Note: Both the left spreader (1) and right spreader (5) should be installed so that they do not project past the tips of the eye looper (2) and right looper (6) respectively. RH-981A...
• The upper thread tension plate (4) and the upper thread take-up lever are interlocked. • The sub tension disc (5) is always kept closed to give the upper thread tension. The tension will change the thread end length at the start of sewing. RH-981A...
2. Adjust the clearance between the needle and the point of upper movable knife (1) to 0.5 – 1.0 mm. * If adjustment can not be performed, reconfirm “4-11. Adjusting the height of the throat plate” and “4-23. Adjusting the position of the lower thread presser”. RH-981A...
* The standard adjustment is done as shown in the above enlarged view, which indicates the first point to make contact with the point of the fixed knife (4) and the pin of the movable knife (5) when the thread trimmer arm (3) operates. RH-981A...
When tightening the bolt (3), make sure that the thread trimmer lever arm (7) and the thread trimmer arm (4) can move smoothly without any end play. Too little engagement may cause the lower thread not to be hooked, leading to thread cast-off at the start of sewing. RH-981A...
When the start switch is pressed and the feed bracket moves to the sewing start point, the lower thread should be securely hooked by thread clamp D (1). On the contrary, the gimp should be just released from thread clamp U (2) to prevent double cutting it. RH-981A...
4. Loosen the screws (3) and (4). Adjust the thread handler (1) by turning it while pivoting on the screw (3). Note: When changing the height of the throat plate (2), be sure to adjust the thread handler (1) because the triangle formed by the lower thread and the gimp will change. RH-981A...
Loosen the screw (1), turn the tension release plate (2) to adjust clearance a between the tension release plate (2) and thread trimmer lever bracket (3). Note: If the lower thread has snapped, reconfirm “6-1-1. Adjusting the solenoid valve speed controllers”. 3810Q RH-981A...
If adjustment is not correct, the gimp sewn in stitches may be pulled, and stitch formation around the button eyelet may be distorted. Loosen the two screws (1), and set the distance from the bed to the upper end of the roller to 11 mm. 3812Q RH-981A...
4. If the engagement is insufficient, return to step 2 to perform fine adjustment so that the end of thread trimmer link lever J assembly (6) overlaps with the match mark on the rear of the link fulcrum plate assembly (7). RH-981A...
The tip of the gimp is pressed down on the material by a few stitches at the start of sewing, and pulled by the movement of the feed bracket. If the gimp is excessively taut when the feed bracket is at the sewing start position, or dimension A is too small, the gimp may come out from under the stitches. RH-981A...
2. After sewing is completed, the feed bracket moves to the home position to trim the gimp (1), gimp thread take-up guide J (3) pushes the gimp thread release plate (4), and the thread tension disc (5) is closed. RH-981A...
In this case, pass the gimp through gimp thread work clamp (2) attached to gimp guide C-J (1). Note: When thick and soft gimp is passed through gimp thread work clamp (2), the gimp tension may be too great during sewing. RH-981A...
Y direction. The lift height of the auxiliary clamp arm is set to 16 mm. Loosen the nut (6), and turn the screw (7) to adjust the height. 3825Q RH-981A...
2. Turn the pulley manually to check the condition of the lower thread. 3. If adjustment is necessary, loosen the screw (1), and turn the tension release plate (2) to adjust distance a between the tension release plate (2) and thread trimmer lever bracket B (3). 3810Q RH-981A...
3. Make sure that the front of the throat plate overlaps with the lower thread presser (1) by 0.5 – 1.0 mm when thread trimmer lever bracket B (5) operates. 4. If adjustment is necessary, remove the lower thread presser bracket (6), loosen the nut (7), and adjust the screw (8). RH-981A...
90 and 270 Note: If the needle penetration movement is adjusted to one point, the clearance between the needle and the point of the looper will not be fixed. 3831Q RH-981A...
Loosen the screw (3), and align the notch (1) of belt cover F with the timing mark (2) on the pulley. Note: When the stop position is changed, the operation range of spreader R will change. Reconfirm the mounting position of the upper movable knife. 3832Q RH-981A...
* There are two types of transformers: a high voltage transformer is equipped with 240V, 380V, 400V, and 415V specifications; a low voltage transformer is equipped with 100V and 110V specifications. Transformer connections <415V, 400V, 380V, 240V> <100V,110V> Power supply Input side Power supply Input side circuit board side 1144S circuit board side 1145S RH-981A...
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5. POWER SUPPLY EQUIPMENT 3518Q DC fan motor (large) PMD PCB for θ-axis shaft Conversion transformer DC fan motor (small) Power supply circuit board Control circuit board <Rear of the control box> 3519Q RH-981A...
If the resistance is 0 ohms (it means a short-circuit), or the resistance between A and C or B and C is not infinity, replace the power supply circuit board. 3525Q RH-981A...
5-3-1. Connector positions Head harness relay 3526Q For θ–axis pulse motor (red) For X–axis pulse motor (white) For Y–axis pulse motor (blue) For θ–axis home position sensor For θ–axis pulse motor (red) 3527Q RH-981A...
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For hand switch (for foot switch) 3528Q Inside of the control box 3529Q Type harness B Note: This type-harness B is only for -12 specifications. If this harness is not connected, you will not be able to run programs for -12 specification sewing machines. RH-981A...
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5. POWER SUPPLY EQUIPMENT Control circuit board 3530Q Power supply circuit board 3531Q RH-981A...
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Indexer sensor harness is inserted into the relay connector θ–axis The harness which relays the home position sensor. valve of the indexer is inserted into connector P21 (EXOUT) Relays the valve harness of the control circuit board. of the indexer. 3534Q RH-981A...
• Needle bar motion is not correct. • θ-axis home position can not be found. θ-axis PM driving current (RB) • Error code E82 appears. θ-axis PM driving current (RC) θ-axis PM driving current (RD) θ-axis PM driving current (RE) RH-981A...
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• Error code E09 appears. TYPE 2 (COM) TYPE 3 (COM) TYPE 4 (COM) TYPE 5 (COM) TYPE 6 (COM) TYPE 7 (COM) TYPE 8 (COM) TYPE 1 TYPE 2 TYPE 3 TYPE 4 TYPE 5 TYPE 6 TYPE 7 TYPE 8 RH-981A...
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• Error codes E05 or E35 appears. (when pressure sensor is (for X-axis home position attached) sensor) +5V (for X-axis home position sensor) Y-axis home position sensor signal (for Y-axis home position sensor) +5V (for Y-axis home position sensor) Pressure sensor signal 0V (for pressure sensor) RH-981A...
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• Left and right motion of feed bracket is not correct. • X-axis home position can not be found. X-axis PM driving current (XB) • Error code E80 appears. X-axis PM driving current (XC) X-axis PM driving current (XD) X-axis PM driving current (XE) RH-981A...
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Feed plate home position sensor signal (when indexer is attached) +24V (for feed plate home position sensor) (when indexer is attached) 0V (for θ-axis home position sensor) θ-axis home position sensor signal -24V +5V (for θ-axis home position sensor) RH-981A...
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P15 [DC300] (MOLEX3191-02R1) Pin no. Signal name Probable symptoms due to poor contact • Machine motor does not run. 0V (for machine motor) • Rotation of machine motor is not correct. +300V • Error code E70 or E91 appears. RH-981A...
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P20 [PER] (JAPAN SOLDERLESS TERMINAL MFG.CO., LTD PHR-5) Pin no. Signal name Probable symptoms due to poor contact Relay condition input • One of error codes E26, E92, E98, and E99 appears. Primary voltage detect Relay OFF output +55V OFF output RH-981A...
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Probable symptoms due to poor contact TYPE 1 • Error code E09 appears. TYPE 2 TYPE 3 TYPE 4 TYPE 8 0V (for TYPE 1) 0V (for TYPE 2) 0V (for TYPE 3) 0V (for TYPE 4) 0V (for TYPE 8) RH-981A...
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P5 [DC300] (MOLEX3191-02R1) Pin no. Signal name Probable symptoms due to poor contact • Machine motor does not run. 0V (for machine motor) • Rotation of machine motor is not correct. +300V • Error code E70 or E91 appears. RH-981A...
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R x D EMLED +12V +12V +12V -12V P3 [PRG] (JAPAN SOLDERLESS TERMINAL MFG. CO., LTD. PHR-10) Pin no. Signal name Probable symptoms due to poor contact • Programmer does not work. T x D R x D +12V -12V RH-981A...
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Probable symptoms due to poor contact θ-axis PM clock signal • Needle bar motion is not correct. θ-axis PM direction signal • θ-axis home position can not be found. • Error code E52 or E82 appears. θ-axis PM save signal θ-axis PM excitation signal RH-981A...
If this adjustment is not carried out, the throat plate and needle plate may interfere with each other. If the stitch width correction amount is set to more than 1.0 mm, the sewing speed will be limited in accordance with the value set. RH-981A...
* If the maximum straight bar tacking length is set to 9.0 mm, it will be necessary to process the work clamp plate. Consult with your local Brother sales office for further details. If the work clamp plate is not processed, the throat plate may interfere with the needle plate and work clamp plate.
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5. POWER SUPPLY EQUIPMENT Circuit board DIP switch D 1001Q ON/OFF Setting items Default RH-981A...
* The memory switch setting will stop flashing. 6. Repeat steps 3 to 5 to change other memory switch settings. 7. Press the SELECT key (1) to change the mode to automatic mode. * The memory switch settings will be memorized. RH-981A...
Accordingly it is recommended that you set home position starting to be carried out each time (setting "1"). (Note 2) If a program number has been set for memory switch No. 13, it will be ignored if a program number has been set for memory switch No. 14. RH-981A...
5-7. Sensors positions and funstions 3536Q Y-axis home position sensor (magnetic sensor) Lower thread trimmer OFF sensor X-axis home position sensor (cylinder sensor) (magnetic sensor) Knife ON sensor (photo sensor) Looper base (θ-axis) home position sensor (magnetic sensor) Safety sensor (limit sensor) 3537Q RH-981A...
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• If the Y-axis home position sensor is out of order, its connectors are not attached correctly, or the cord does not supply electricity, error code E-51 or E-81 will appear. 3539Q RH-981A...
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(1) lift stroke. • The cutter sensor partition plate (slit) (3) is attached to link C (2) which moves the cutter lever (1). The signal is sent from the cutter sensor (4) mounted on the bed. RH-981A...
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• If the machine head is kept raised, the safety sensor Safety switch is out of control, its connectors are not attached securely, or the cord does not flow electricity, error code E-02, E-32, or E-62 will appear. 3543Q RH-981A...
2. The exhaust throttle valve is only attached to the OFF side of the knife valve. Adjust the protrusion of the speed controller to 7.2 mm. Note: If the speed controllers are excessively throttled, error codes including E-72 (cutting block operation is incorrect), may appear. If excessively opened, abnormal noise may be emitted when the knife cylinder returns. RH-981A...
6. AIR PRESSURE MECHANISM 6-2. Air tube layout Work clamp cylinder Work clamp cylinder For work clamp For cloth opener For lower thread trimming 3549Q [Reference] Dimensions for cylinder rod assembly 1. Upper thread release cylinder and sub presser cylinder 3550Q RH-981A...
θ axis is returned to home position. ↓ ↓ X, Y, and θ axes each return to X, Y, and θ axes each return to home position (by means of home position (by means of respective sensors). respective sensors). RH-981A...
* Turn the switch on and off to check it, and move the object by hand to check the sensor. 5. When returning to normal operation, turn power off and then on again. <Example> When checking the cloth presser switch Check whether a response occurs here 3559Q RH-981A...
5. Press the start switch (1). * While the start switch is kept pressed, the machine will work as it is specified by each check code. 6. When returning to normal operation, turn power off and then on again. RH-981A...
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The buzzer sounds. C-32 All indicators on the operation panel will be lit. *1 Available only when indexer is attached. *2 Available only when special lapel cutting device (optional) is attached. *3 Available only when upper thread nipper (optional) is attached. RH-981A...
Needle up sensor is OFF when it E-40 needle bar to its highest position, and [ I ] 11 should be ON. then press the RESET key. [ I ] 20 E-42 Cutter sensor is ON. Turn off the power. [O] C-06 RH-981A...
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[ I ] 15 searching home position. θ home position sensor is not set to E-82 within specified time Turn off the power. [ I ] 16 searching home position. E-89 Machine motor reverse operation error Turn off the power. [O] C-07 RH-981A...
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Buttonhole sensor does not turn ON E202 when using a straight buttonhole Press the RESET key. [ I ] 22 program. Buttonhole sensor does not turn OFF E203 when using an eyelet buttonhole Press the RESET key. [ I ] 22 program. RH-981A...
* Even if the result of continuity test is acceptable, harness may be broken or short-circuited. It may appear when oscillation occurs. 5. If there is still an error even after replacing the hand switch (foot switch) harness (which is connected to control circuit board and control box), replace the control circuit board. RH-981A...
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4. Check if connector P4 (TYPE) on the control circuit board is securely inserted and if any harness is broken or short-circuited. 5. Replace the type cord (harness connected to control circuit board and the control box). 6. Replace the control circuit board with a new one. RH-981A...
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6. Check if connector P9 (EXINB) on the control circuit board is securely inserted and if any harness is broken or short-circuited. 7. Replace the right driving sensor and its harness. 8. Replace the control circuit board with a new one. RH-981A...
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4. Check if connector P4 (AIR) of the control circuit board is correctly inserted and if valve cord is broken or short-circuited. 5. Replace valve cord with a new one. 6. Replace valve unit with a new one. 7. Replace the control circuit board with a new one. RH-981A...
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• If the voltage is not + 55V, replace the power supply circuit board. * If the result is acceptable, the control circuit board or PMD circuit board for θ-axis may be damaged or X-, Y-, or θ-axis pulse motor or its harness may be short-circuited. RH-981A...
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5. Replace the PMD circuit board for θ-axis with a new one. 6. Replace the control circuit board with a new one. 1. Refer to E95, E96 and E98. E-99 2. Replace the power supply circuit board with a new one. RH-981A...
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2. Of connectors relayed to head harness, check if the harness for the buttonhole sensor is correctly E-203 attached to the connector for the buttonhole sensor. * Check if there is no harness in the control box that is broken or short-circuited. RH-981A...