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handi quilter HQ Stitch 510 Service Manual

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HQ Stitch 510
SERVICE MANUAL
10/11/16

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Summary of Contents for handi quilter HQ Stitch 510

  • Page 1 HQ Stitch 510 SERVICE MANUAL 10/11/16...

  • Page 2: Table Of Contents

    Table of Contents Top Cover Removal Belt Cover Removal Base Plate Removal 4-22 HQ Stitch 510 Lubrication Appendix Needle Bar Height Presser Bar Height Feed Dog Height Feed Dog Alignment Feed Cam Timing Feed Lifting Cam Timing 29-33 Needle to Hook Timing and Clearance...

  • Page 3: Top Cover Removal

    FRONT COVER & FACE PLATE REMOVAL 1. Remove the two screws on the top cover. 2. As you start to remove the top cover be very careful not to pull it off. There is a plug connection coming from the bobbin winder motor to the top of the A-board.

  • Page 4: Belt Cover Removal

    BELT COVER REMOVAL 1. Turn the machine to look at the right hand side. Locate the three Philip's head screws and remove them. 2. Start to remove the belt cover from the front and unlocking it from the clips in the rear. Be careful not to remove it fast and tear it away from the machine.

  • Page 5: Base Plate Removal

    BASE PLATE REMOVAL 1. Lay the machine down and locate the four black screws in the rubber feet and remove them completely. 2. Gently lift up on the machine and remove the base plate.

  • Page 6: Hq Stitch 510 Lubrication Appendix

    HQ Stitch 510 Lubrication...
  • Page 7 Lubrication Notes Factory Note: “Factory lubricated parts will provide years of household sewing without routine oiling. However, whenever the machine is being serviced, check to see if any parts need to be lubricated.”...
  • Page 8 Lubrication Notes 1. Oil – Put a drop of HQ Stitch oil on each point. 2. Grease - Put a small amount of HQ Stitch grease on each point. 3. Excessive lubrication can cause more harm than good, use only a little lube in the right place.
  • Page 9 Oil – Put a drop of oil on the following: #1 The presser bar at the top and bottom bushing (behind the face cover and under the top cover).
  • Page 10 Oil – Put a drop of oil on the following: #2 The top and bottom of the needle bar at the bushings (behind the face cover).
  • Page 11 Oil – Put a drop of oil on the following: #3 The felt on the underside of the machine top cover, for the presser bar and take-up lever (seen when removed).
  • Page 12 Oil – Put a drop of oil on the following: #4 The felt at the top of the needle bar bushing (under top cover).
  • Page 13 Oil – Put a drop of oil on the following: #5 The take up lever crank at the three orifices (under top cover).
  • Page 14 Oil – Put a drop of oil on the following: #6 The take up lever connecting rod between the crank and the needle bar driver, at the top orifice and at the bottom where it connects to the needle bar driver (behind the face cover and under the top cover).
  • Page 15 Oil – Put a drop of oil on the following: #7 The oil wicks at the top needle bar bushing and take up lever links (under top cover). Note: oil the wicks enough (more than a drop) so that the oil can run down to the ends of the wicks to lubricate the...
  • Page 16 Oil – Put a drop of oil on the following: #8 The large bottom timing shaft (with timing belt) right end bushing, oil between the collar and the bushing on the left and between the pulley and bushing on the right (under bottom cover).
  • Page 17 Oil – Put a drop of oil on the following: #9 The large bottom timing shaft (with timing belt) left end bushing, oil at each side of the bushing (under bottom cover).
  • Page 18 Oil – Put a drop of oil on the following: #10 The bottom feed shaft bushings, on both sides of bushing at shaft. There are two left bushings and two right bushings) (under the bottom cover).
  • Page 19 Oil – put a drop of oil on each of the following: #11 The articulating links between the two bottom feed shafts at each pivot point (under bottom cover).
  • Page 20 Oil – put a drop of oil on each of the following: #12 The two felts on the feed dog support shaft (under bottom cover).
  • Page 21 Grease – Put a small amount of grease on the following: #13 The bottom timing shaft, large white timing gear (under the grease cover after removing the bottom cover). Note: makes sure to remove any lint in the gears first.
  • Page 22 Grease – Put a small amount of grease on the following: #14 The large timing shaft feed dog lift cam (under bottom cover).
  • Page 23 Grease – Put a small amount of grease on the following: #15 The thread cutter linkage (under bottom cover).
  • Page 24 Grease – Put a small amount of grease on the following: #16 The thread cutter linkage (under bottom cover).

  • Page 25: Needle Bar Height

    NEEDLE BAR HEIGHT 1. To check your needle bar height turn the hand wheel towards you to bring the needle to it’s lowest position. When the needle bar is in it’s lowest position you can see that there are two hairlines on the left side of the needle bar.

  • Page 26: Presser Bar Height

    PRESSER BAR HEIGHT 1. To check the presser bar height lift the presser bar lifter up. Take the gauge and place it underneath the foot. The presser foot should rest on the fourth step which is 6mm. QM39401 2. If it is not correct locate the hex screw that is on the presser bar block.

  • Page 27: Feed Dog Height

    FEED DOG HEIGHT 1. Turn the stitch length dial to 6 (all the way counterclockwise) and turn the hand wheel to bring the feed dogs to their highest position. When the feed dogs are at their highest position they should be about .8 – 1.0mm above the plate (you should just be able to see the full tooth above the needle plate and no more).

  • Page 28: Feed Dog Alignment

    FEED DOG ALIGNMENT Theory: the feed dogs should not interfere or hit the needle plate no matter how long or short the stitch length is set. Quick check: set the stitch length at 6 and check in forward and reverse with the reverse lever while running the machine to make sure the feed dogs do not hit at any point.

  • Page 29: Feed Cam Timing

    FEED CAM TIMING 1. In order to check feed cam timing for proper sewing, remove the foot, turn the stitch length dial to 6. Bring the needle to the highest position. Start to lower the needle and stop a little below 17.5mm, (top line). At this point (between 17.3 –...

  • Page 30: Feed Lifting Cam Timing

    FEED LIFTING CAM TIMING 1. When the tip of the needle is lowered into the needle plate about .4mm, the feed dogs should be just about even with the surface of the needle plate. 2. If an adjustment is needed lay the machine on it’s back and locate the feed lifting cam.
  • Page 31 NEEDLE TO HOOK TIMING & CLEARANCE (1of 5) Important Note Before Proceeding with Timing: The timing belt should provide Imediate Transfer of Motion to the hook when the hand wheel is turned. If the timing belt tension is too tight it will provide unnecessary resistance and wear;...

  • Page 32: Needle To Hook Timing And Clearance

    NEEDLE TO HOOK TIMING & CLEARANCE (2 of 5) Feed dogs removed for easier viewing Hook point at near edge of needle 3. When the bottom hairline on the needle bar matches the bottom edge of the needle bar bushing the tip of the hook should be on the near or right hand side of the needle as shown.
  • Page 33 NEEDLE TO HOOK TIMING & CLEARANCE (3 of 5) Enlarged image: When the bottom hairline on the needle bar matches the bottom edge of the needle bar bushing, the tip of the hook should be on the near or right hand side of the needle as shown.
  • Page 34 NEEDLE TO HOOK TIMING & CLEARANCE (4 of 5) 4. If an adjustment is needed, lay the machine down (remove the bottom baseplate cover if it has not already been removed). Locate the back of the hook race. There are three black slotted screws that hold the hook race tight. Loosen the three screws.
  • Page 35 NEEDLE TO HOOK TIMING & CLEARANCE (5 of 5) 5. Hold the hook race towards the front to 6. As you hold the hook race towards the make sure that the outer part is still locked hook stopper and once you have lined up in the hook stopper.

  • Page 36: Hook Stopper Position

    HOOK STOPPER POSITION (1 of 3) Hook stopper Hook stopper spring 1. To check to see if you have correct hook stopper position use the needle as a gauge. The needle should be lined up in the center of the hook stopper and the outer side of the hook stopper spring.
  • Page 37 HOOK STOPPER POSITION (2 of 3) 2. To adjust the hook stopper position, lay the machine down and locate the set screw that holds the stopper bracket. Loosen the screw and move the stopper into the correct position.
  • Page 38 HOOK STOPPER POSITION (3 of 3) 1. To check to see if you have correct hook stopper position use the needle as a gauge. The needle should be lined up in the center of the hook stopper and the outer side of the hook stopper spring.

  • Page 39: Needle Threader Adjustment

    NEEDLE THREADER ADJUSTMENT 1. If you need to change the needle threader pull the shaft down gently and push down on the threader gently and remove it. 2. If the height of the threader is off to the needle, then turn the hand wheel slightly to expose the threader block on the needle bar.

  • Page 40: Thread Cutter Troubleshooting Chart

    Thread Cutter Troubleshooting Thread Cutter Troubleshooting 08/08/16 Issue Potential Cause Action Replace or sharpen the static cutter blade page 43 The needle thread is not cut The static cutter is dull The static cutter blade is out of Adjust the position of the static cutter blade page 43 position Reduce the check spring stroke page 60.

  • Page 41: Thread Cutter Adjustment

    THREAD CUTTER ADJUSTMENT (1 of 2) 1. Turn the hand wheel to bring the needle down to it’s lowest position and continue to bring the needle up and stop about 6mm above the needle plate. It would be the distance of where the presser foot would be when raised.
  • Page 42 THREAD CUTTER ADJUSTMENT (2 of 2) 2 - 2.5mm 3. Turn the hand wheel until the thread cutter is at its far swing (to the left). At this pointThe tip of the thread cutter should be 2 – 2.5 mm from the center needle position which you can gauge through the thread guide.

  • Page 43: Thread Guide Adjustment

    THREAD GUIDE ADJUSTMENT (1of 2) 1.4MM When the needle is lowered down into the thread guide the left inner edge of the thread guide plate should be about 1.4mm from the center needle position.
  • Page 44 THREAD GUIDE ADJUSTMENT (2 of 2) 2.7MM 2. The back edge of the thread guide plate should be about 2.7mm (the smallest step of the step gauge # QM39401) from the center needle position. 3. If you need to adjust the thread guide plate loosen the small black Philip's head screw and the larger Philip's head screw to the right of it.

  • Page 45: Static Cutter Blade

    STATIC CUTTER BLADE 1. Turn the hand wheel to bring the 2. Lay the machine down and push up on the link needle down to it’s lowest body while turning the hand wheel. As you do this position and continue to bring the the thread cutter will move.

  • Page 46: Needle To Cutter Cam Timing

    NEEDLE TO CUTTER CAM TIMING (1 of 2) 1. Turn the hand wheel to bring the 2. Lay the machine down and push up on needle down to it’s lowest position the link body while turning the hand wheel. and continue to bring the needle up Stop as soon as the thread cutter linkage and stop about 6mm above the starts to move to the right.
  • Page 47 NEEDLE TO CUTTER CAM TIMING (2 of 2) 4. If an adjustment is needed 5. Loosen the hex screw with a 2.5m hex remove the two screws that hold the tool on the opposite side of the small hook cover plate. steel gear on the lower shaft.

  • Page 48: Thread Drawing Lever Adjustment

    THREAD DRAWING LEVER ADJUSTMENT (1 of 2) 1. Turn the hand wheel toward you 2. Push the solenoid disk closed to move the to raise the needle bar from the thread drawing arm. When doing this the link lowest position to a point above the body should lock into the thread cutter cam.
  • Page 49 THREAD DRAWING LEVER ADJUSTMENT (2 of 2) 5. With the solenoid open, in its relaxed position, and with the thread drawing lever down, the stopper should be up against the thread drawing lever. If not loosen the Phillips screw holding it and move it over to touch and then retighten the screw.

  • Page 50: Auto Tension Release

    AUTO TENSION RELEASE 1.Lower the presser foot. Turn the 2. Set the tension dial to 4 and push hand wheel toward you to raise the solenoid disk to the right. the needle bar until the needle point is just above the needle plate.

  • Page 51: Identifying Electronic Components & Connections

    IDENTIFYING ELECTRONIC COMPONENTS & CONNECTIONS...

  • Page 52: A-Board Removal

    A-BOARD REMOVAL 1. Unplug the 12 connectors from the A- 2. Remove the two Philip's head board. (7 plugs are empty: 3 white, 3 screws holding the black cover to the black and 1 blue). Carefully remove the A-board casing. wires from the black cover attached to the right side of the A-board casing.

  • Page 53: Installing The A-Board

    INSTALLING THE A-BOARD 1. Install the A-board in the casing and 2. Attach the machine socket, attach the two Philip's head screws. transformer and driving motor wires into the A-board first. 3. Place the black cover on top and make 4.

  • Page 54: Needle Stop Position

    NEEDLE STOP POSITION 1. Note: When the needle up/down button is pressed the needle should stop 2. Lower the needle bar by turning the just before the take-up lever is at the hand wheel towards you and stop highest position with green up arrow when the red and green arrows are illuminated or the needle at the lowest both illuminated.

  • Page 55: Removing The Drive Motor

    REMOVING THE DRIVE MOTOR (1 of 2) 1. Remove the two screws that hold the 2. Lift up on the motor to cause drive motor to the casting of the machine. slack and remove the belt from the hand wheel. 3.

  • Page 56: Removing The Drive Motor

    REMOVING THE DRIVE MOTOR (2 of 2) 5 Unplug the motor connection while pushing down the connector lock. 6. Remove the two screws that hold the motor connection bracket. 7. Cut the zip tie that holds the wires to the motor unit and remove the motor from the machine.

  • Page 57: Installing The Drive Motor

    INSTALLING THE DRIVE MOTOR (1 of 2) 1. Place the motor connection bracket back onto the motor unit and install the two screws. 2. Plug in the motor connection. 3. Plug in the motor sensor connection...
  • Page 58 INSTALLING THE DRIVE MOTOR (2 of 2) 4. Place the motor into it’s position and slip 5. Place the two screws in and tighten the belt over the hand wheel. them. When you tighten the motor, you will also have to find the proper tension of the belt.

  • Page 59: Cover Replacement

    COVER REPLACEMENT (1 of 2) 1. Reattach the plug for the external thread cutter 2. Start to attach the cover and be careful of the wires. Start from the rear and close it towards the front. 3. Insert the three screws and tighten.
  • Page 60 COVER REPLACEMENT (2 of 2) 1. Reattach the wire coming from the bobbin winder unit in the top cover to the A-board. 2. Place the top cover on top of the machine being careful not to pinch anything and tighten the two screws.

  • Page 61: Attaching The Base Plate

    ATTACHING THE BASE PLATE 1. Hold the base plate to the machine and align it so the rubber feet with screws can go back in. 2. Tighten the four screws in the rubber feet to hold the base plate to the machine.

  • Page 62: Check Spring Stroke & Pre Tension Dial

    CHECK SPRING STROKE AND PRE- TENSION DIAL Starting point 11-15mm 1. Thread the machine up to the thread 2. Pull the thread and the check spring guide. Make sure the foot is down. Grab the will swing down. The thread from where thread on the other side of the thread guide you marked before to the thread guide and mark it mentally.
  • Page 63 Checking Timing Belt Tension Important Note - Before Proceeding with Timing: The timing belt should provide Immediate Transfer of Motion to the hook when the hand wheel is turned. If the timing belt tension is too tight it will provide unnecessary resistance and wear; however if the timing belt is too loose then it will not be posssible to time the machine correctly.

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