Infinity QM40275 Service Manual
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Infinity QM40275 Service Manual

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SERVICE MANUAL
QM40275 • APRIL 1, 2015
© 2015 Handi Quilter, Inc. All rights reserved.
The information contained in this document is subject to change without notice. If you find any problems
in the manual, please report them to us in writing. This document is not warranted to be error-free.
Handi Quilter, Inc. assumes no responsibility or liability for any errors or inaccuracies that may appear in
the informational content contained in this manual.
Handi Quilter, HQ Infinity, HQ Avanté, HQ Fusion, HQ Sixteen, HQ Sweet Sixteen, HQ Pro-Stitcher, and
TruStitch are either trademarks or registered trademarks of Handi Quilter, Inc.
Printed in the United States of America.
Part number: QM40275
04/01/2015

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Summary of Contents for Infinity QM40275

  • Page 1 Handi Quilter, Inc. assumes no responsibility or liability for any errors or inaccuracies that may appear in the informational content contained in this manual. Handi Quilter, HQ Infinity, HQ Avanté, HQ Fusion, HQ Sixteen, HQ Sweet Sixteen, HQ Pro-Stitcher, and TruStitch are either trademarks or registered trademarks of Handi Quilter, Inc.

  • Page 2: Table Of Contents

    Contents About the HQ Infinity ......................... 5 About this Manual ............................5 About HQ Support ............................5 Service Manual Guidelines ......................... 6 Electrostatic Discharge (ESD) ........................6 1. General Specifications ........................7 2. HQ Lubrication Specifications ......................8 HQ Lube Kit..............................8 HQ Lubricant Part Numbers ........................
  • Page 3 19. Upper Cable Trough ........................77 20. Rear Handlebars ......................... 78 21. Rear Plastic Panels ........................79 Rear Panel Screws ............................ 79 22. Front Plastic Panels ........................83 Front Panel Screws ........................... 84 23. 48V Power Supply ........................87 HQ Infinity Service Manual...
  • Page 4 24. Front Distribution Boards ......................90 25. Main Control Board ........................92 Main Control Board LEDs .......................... 95 Front RS232 Connection ........................... 96 Pro-Stitcher RS232 Connection ........................ 97 Rear Display USB Connection ........................98 Rear Display RS232 Connection ........................ 99 USB Camera Hub Connection ........................

  • Page 5: About The Hq Infinity

    The HQ Infinity uses high-tech electronics and an innovative touch-screen user interface to offer greater functionality and ease of operation to home quilters than ever before conceived in the quilting industry. The HQ Infinity quilting machine is a high quality machine that both incorporates robust design features and is easy to service.

  • Page 6: Service Manual Guidelines

    Electrostatic Discharge (ESD) Observe precautions for handling electrostatic sensitive devices whenever you are handling any of the circuit boards in the HQ Infinity. These precautions include: • Whenever possible, work performed on the quilting machine that includes handling any of the circuit boards should be done at an ESD-safe work bench.

  • Page 7: General Specifications

    Electrical Power 100-240 VAC, 50-60 Hz, 600 watts peak Sew Foot Stroke/Lift 5 mm Needle Bar Stroke 35.3 mm Take-up Stroke 73 mm Lubrication, main components Kluber Lube, Permanent Lubrication of hook Velocite 10, Texaco 22 HQ Infinity Service Manual...

  • Page 8: Hq Lubrication Specifications

    2. HQ Lubrication Specifications HQ Lube Kit Part Number: QM49262 Lubrication Type Infinity Machine Component #1 Kluber, Constant OY68 (Red) • Needle bar and presser bar (sintered bronze bearings) • Front two hook shaft bearings (sintered iron bearings) • Reciprocating counterweight sleeve (sintered...

  • Page 9: Hq Lubricating And Maintenance Schedule

    In addition to ongoing cleaning and oiling maintenance of the machine by the machine owner, the HQ Infinity should be serviced by an authorized Handi Quilter Representative every 24 months or 15 million stitches, whichever occurs first. When the HQ Infinity reaches 15 million stitches (and every 15 million stitches thereafter, i.e.
  • Page 10 Reciprocating counterweight sleeve #1 Red Kluber Constant OY68 oil around the inside edge if the sleeve is sintered bronze. #5 Orange Kluber GLY 151 Polylub dampening grease around the inside edge if the sleeve is black plastic POM. Front two hook shaft sintered iron bearings #1 Red Kluber Constant OY68 oil for hook shaft front two...
  • Page 11 #3 Yellow Kluber GLY 2100 liquid grease on the articulating link, the take-up lever, and the needle bar driver. Lubricate the three places indicated. Take-up lever caged needle bearings #4 Green NCA 15 Isoflex grease. | 11 HQ Infinity Service Manual...

  • Page 12: Thread Mast, Hand Wheel, And Thread Guides

    Â IMPORTANT: The take-up lever caged needle bearings must be packed well using the special syringe (part number QM40241) at least every 15 million stitches. Lubricate the two places indicated in the previous image.  NOTE: Use this grease on the counter weight needle bearing also.

  • Page 13: Check Hand Wheel Gap

    1. Remove one of the front panels. (See To remove the rear plastic panels in section 21, rear Plastic Panels.) 2. Use a 3mm hex tool to loosen the two hand wheel set screws. 3. Adjust the hand wheel to proper position. 4. Retighten the two set screws. | 13 HQ Infinity Service Manual...

  • Page 14: Check Thread Guides And Stirrup

    Â IMPORTANT: Home sewing machines release the top tension whenever the presser foot is raised. The HQ Infinity machine does not have any presser bar lever or top tension release mechanism. Also the thread is wrapped around the bottom of the top tension assembly into the tension disks.
  • Page 15 If you want to use the handlebar plus (+) and minus (—) buttons to change speed, be sure touch the Easy-Touch Tension button again to return to the Main screen. | 15 HQ Infinity Service Manual...

  • Page 16: Take-Up Spring Position

    Take-up Spring Position The straight part of the spring should be straight up at 12 o’clock or a hair towards 11 o’clock when it is its rest position at the right. To correct the take-up spring position 1. Use a 2mm hex tool to loosen (a couple turns) the set screw in the machine head frame on the lower right side of the top tension assembly.
  • Page 17 3. Rotate the black barrel to adjust the tension on the take-up spring until the spring will return to the right (clockwise) against the end of the slot when the spring is pushed down to the left (counterclockwise) and released. | 17 HQ Infinity Service Manual...
  • Page 18 4. See the image to the right showing the take-up Take-up spring at rest spring at rest. Retighten the two set screws on at the right, after being pushed down to the left. the black collar. To replace the take-up spring 1.
  • Page 19 Â IMPORTANT: The primary cause of top-tension failure is from not flossing the thread into the top tension disks. Someone might see the thread around the outside of the tension discs and think that | 19 HQ Infinity Service Manual...

  • Page 20: Components Of The Tension Assembly

    224 counts. The midpoint is 112.  NOTE: For comparison to other HQ machines, a full rotation of the tension knob on the Infinity results in tighter tension than one revolution of the tension knob on other HQ machines.
  • Page 21 1 (N/L used) 9 QM13089 HOLDER-TU SPRING AUTO TENSNR QM13089 Holder-TU Spring Auto Tensioner 10 QM13083 NUT AUTO TENSIONER DM QM13083 Nut Auto Tensioner DM 11 QM13242 DISK-MOD TENSION SPRING BASE QM13242 Disk-Mod Tension Spring Base | 21 HQ Infinity Service Manual...

  • Page 22: Thread Cutter

    5. Thread Cutter The thread cutter uses a stepper motor. Software sends a step command to turn the motor a certain number of degrees. A cutting cycle is approximately 90 degrees from the home position to the cutting position. The thread cutter hook assembly has two powerful small magnets that pass two hall effect sensors on the small circuit board to keep track of the hook assembly position.
  • Page 23 If it is too long the end of the screw will drag on the needle plate, bind up, and not move smoothly. | 23 HQ Infinity Service Manual...
  • Page 24 To replace the blade The blade should not need to be replaced very often. Of course user conditions, type of threads, and other variables will affect the frequency the blade will need to be changed. 1. Remove the two needle plate screws. 2.
  • Page 25 Orientation 5. Check for any excess cable and tuck it into the frame extrusion. Make sure to untwist the wires the proper direction when remounting the needle plate. Thread Cutter Blade Driving Screw End | 25 HQ Infinity Service Manual...
  • Page 26 Â IMPORTANT: When the thread cutter wiring is run, it should be semi-taught in order to keep it from being caught in the hook. The wire should be tucked back into the upper left channel of the hook frame extrusion if pulled out during work on the thread cutter or when the needle plate is removed.
  • Page 27 Align the left magnet to the sensor as shown in the image and tighten the small set screw onto the round part of the shaft. | 27 HQ Infinity Service Manual...
  • Page 28  NOTE: if the motor shaft is in the wrong place, you may need to power up the machine and cycle the cutter by pressing the thread cutter button a few times until the thread cutter hook can be fixed onto the round part of the shaft.

  • Page 29: Components Of The Thread Cutter

    Screw-M3X.5X3 Phil Pan HD QM13232 Screw-4-40X1/8" Set Flat Pt QM13113 Pulley - Thread Cutter QM13234 Screw-2-56X5/16 Phil Pan HD QM13231 Washer-M2.5 QM13207 Magnet - 1/16X1/32 DM QM13109 Hook - Thread Cutter QM10275 Washer-Fiber #4X.12X.25X.062 | 29 HQ Infinity Service Manual...

  • Page 30: Securing Flats And Screws

    6. Securing Flats and Screws The HQ Infinity uses flats and special screws to prevent loop lift timing from slipping except at the hook in the case of a thread lock. If the hook cannot slip, then something will have to break.

  • Page 31: Pitman Short Shaft

    • Rear main shaft timing pulley flat • Head frame pulley main shaft flat Pitman Short Shaft • Hole for first pitman screw with pinned • Flat for head frame lower timing pulley | 31 HQ Infinity Service Manual...

  • Page 32: Hook Shaft

    • Flat for stepped collar head frame lower shaft Hook Shaft • Hook shaft pulley small tooth, motor • Hook shaft pulley large tooth, timing Small Large • Hook shaft pulley small tooth, motor • Hook shaft pulley large tooth, timing Small Large •...

  • Page 33: Take-Up Lever

    Take-up Lever • Take up lever pitman flat Rear Axle Assembly • Long axle flat for shaft coupler • Short axle flat for shaft coupler | 33 HQ Infinity Service Manual...

  • Page 34: Motor Shaft

    7. Axial Play The HQ Infinity primarily uses ball bearings that are pressed onto the main shaft and hook shafts. The ball bearings are the main provision to prevent axial play on these shafts; they are pressed onto the shafts into the correct positions with gauges and special presses during machine assembly.
  • Page 35 There is a spacer in front of the front pulley, between the bearing and the pulley.  NOTE: On the first HQ Infinity machines there was also a spacer at the back timing pulley between the bearing and the pulley.

  • Page 36: Main Shaft

    To correct the rear hook shaft 1. Use a 2mm hex tool to loosen the two sets screws on the front pulley and slide the front pulley and spacer up against the front bearing internal race. (Ensure the bearing is firmlly seated into its housing.) 2.
  • Page 37 3. Check that the top pulley in the front gear box Push of the head frame is adjusted to the rear of the in to machine to contact the inner race of the ball remove gap. bearing. | 37 HQ Infinity Service Manual...
  • Page 38 To correct the main shaft 1. At the rear of the machine, use a 2.5mm hex tool to loosen the two set screws on the rear main shaft timing pulley (by the hand wheel) and slide the pulley up against the inner race of the rear ball bearing.

  • Page 39: Leveling The Machine

     NOTE: Loosen the screws a turn or two only, but do not remove the screws. This will make more work for you if the screws come out of their T-nut 5. Wiggle the machine and let it come to its rest position. | 39 HQ Infinity Service Manual...

  • Page 40: Rear Axle And Axle Housings

    6. Retighten the six bottom side extrusion screws. 9. Rear Axle and Axle Housings 7. Check the machine to see if it still rocks, if so, repeat the process. A special alignment tool is used to press the wheels onto the axle hubs to prevent the wheels from wobbling during factory assembly.
  • Page 41 (circled at right). Y-Rack Cutout • Rear left housing has no cutout for the HQ Pro-Stitcher Y-rack; short axle; slotted hole between the four mounting screws; and mounting holes are not elongated for adjustment. Slotted hole | 41 HQ Infinity Service Manual...

  • Page 42: Aligning Wheels To The Correct Width For Carriage Tracks

    • Rear right housing has cutout for HQ Pro-Stitcher Y-rack; long axle; slotted hole between the four mounting screws; and mounting holes are elongated for adjustment.  NOTE: Elongated mounting holes circled at the right. Slotted hole Y-Rack Cutout Summary •...
  • Page 43 The shaft coupler should not rub on the encoder cover. Â IMPORTANT: Do not stretch the coupler. 6. Ensure that the wheels roll freely front to back on the carriage that will be used with the machine. | 43 HQ Infinity Service Manual...

  • Page 44: Reciprocating Counterweight Timing

    10. Reciprocating Counterweight Timing To check reciprocating counterweight timing • When the needle bar is at its lowest position (bottom dead center), the reciprocating counter weight should be at its top position (top dead center).  NOTE: These two forces counter-oppose each other for optimum balance through-out the machine’s entire speed spectrum to resolve vibration issues.

  • Page 45: Belt Tension

    If it is too tight, the machine belts will be louder and the machine hand wheel harder to turn. This will make the machine less responsive. | 45 HQ Infinity Service Manual...

  • Page 46: Hook To Main Shaft Belt Tension

    When properly adjusted, the HQ Infinity will have good response for accurate stitching, while preventing undue strain on the bearings, excess belt noise, or machine tightness. Ensure that the belt has immediate transfer of motion and good engagement, without being too loose or too tight.

  • Page 47: Belt Idler Flange Position

    The three timing belt idlers have a single flange. The idlers on the first HQ Infinity machines used a different size spacer behind them, depending upon whether the idler flange was inside or out. On these machines, the spacer for inside idler flanges are 3mm and silver.

  • Page 48: Presser Bar Height

    The idlers for later HQ Infinity machines were changed so that all spacers are both 3.5mm and black. They can be used whether the flange lip is on the inside or outside. When idlers are removed, be sure to note the position of the idler flange (whether it is inside or outside) and the size of the spacer washer used (whether it is thick, thin or the same).
  • Page 49 When it is tightened with a 2.5mm hex tool, push down on it to put a little pressure on the felt piece. Photos are shown with the cover off for clarification but can be adjusted with the front cover on. | 49 HQ Infinity Service Manual...

  • Page 50: Needle Position

    To check the presser bar height • When the needle bar in its lowest position, the bottom of the hopping foot ring should be no higher than 0.5mm above the needle plate. It is permissible for the hopping foot ring to lightly touch the needle plate.

  • Page 51: Left To Right

    8. Check to make sure the hook frame did not shift during tightening and that the needle is still centered front to back in the needle plate hole. Left-to-Right Adjustment Make the left-to-right needle adjustment only after making the front-to-back adjustment. | 51 HQ Infinity Service Manual...
  • Page 52 To check the left-to-right needle position • The needle should be relatively centered left to right in the needle plate. To correct the left-to-right needle position  IMPORTANT: Before making this adjustment, ensure that the needle is straight. Use a size 16/100 MR needle.

  • Page 53: Timing

    If needle bar height is too far off, it will not be possible to set needle distance into the scarf because the scarf will not be aligned with the hook. Needle bar height will only be wrong if some one changes it or sets it wrong in 99.9% of cases. | 53 HQ Infinity Service Manual...
  • Page 54 Â IMPORTANT: Check the above three items to ensure they are correct before attemping to adjust timing. This will help you know what needs to be corrected before beginning the timing adjustments. This section of the manual reviews how to check timing before you adjust timing. Passing Window Stop Finger Opening...

  • Page 55: Tools Required

    A new straight needle, system 134MR, size 16/100 (crank needle)  NOTE: Roll the needle on a flat surface like the needle plate while watching the point for wobbles, a straight needle will not have a wobbley needle point. | 55 HQ Infinity Service Manual...
  • Page 56 To check loop lift and hook-to-needle distance timing 1. Use a 2.5mm hex tool to remove the hopping foot and needle. 2. Use a #3 flat screwdriver to remove the two needle plate screws. Carefully remove the needle plate and tip it over onto the hook frame, taking note of which way you twist the wires so you can untwist them when you replace the needle plate.
  • Page 57 BDC.) This step may need to be repeated a few times in order to remove all excess play between the clamp and gauge. 9. After the clamp is tight, remove the gauge. | 57 HQ Infinity Service Manual...
  • Page 58 10. Carefully rotate the hand wheel in direction of motion (DOM) until the clamp lightly touches the bottom of the bearing surface.  NOTE: DOM is counterclockwise when looking directly at the hand wheel from the rear of the machine.  NOTE: One of the most common mistakes made by newer technicians is turning the hand wheel the wrong direction, clockwise, during this step or when making the actual adjustment.
  • Page 59 If you think the needle bar height is off, it likely it is not off and more likely that you have done something wrong during the timing process. Needle bar height is discussed further in the next section after timing. | 59 HQ Infinity Service Manual...

  • Page 60: Correcting Loop Lift And Hook-To-Needle Distance Timing

    14. Check the stop finger height to make sure it is adjusted correctly to hold the bobbin basket and allow for proper thread escapement. The stop finger should be up against the solid machined edge to support the finger so it doesn’t spin out of place.
  • Page 61 To set loop lift and hook-to-needle distance 1. Install a new straight 100/16 MR (crank needle). 2. Use a 2mm hex tool to loosen the two screws on the back of the hook. | 61 HQ Infinity Service Manual...
  • Page 62 3. Replace the clamp and set with a 2.6mm feeler gauge, making sure to turn the hand wheel correctly in the direction of motion after the feeler gauge is removed. See To check loop lift and hook-to-needle distance timing above before resetting if you have questions about setting the feeler gauge and clamp.
  • Page 63 In regular sewing machines, the fabric should only be fed in a very | 63 HQ Infinity Service Manual...

  • Page 64: Stop Finger

    The needle guard on the hook helps to prevent the fabric from pushing the needle into the expensive hook point and protects the hook from damage. Additionally, HQ Infinity uses the 134 MR needle system (crank needle) which helps to prevent the needle from being deflected too far away from the hook as fabric pushes the needle, especially at the high stitching speeds (up to 3100 SPM).
  • Page 65 .8mm to 1.0mm.  NOTE: This clearance ensures that there is adequate space for thread escapement during the sewing process. .8mm to 1.0mm | 65 HQ Infinity Service Manual...

  • Page 66: Needle Bar Height Timing

    To adjust the stop finger gap 1. Use a 2.5mm hex tool to loosen the stop finger screw and adjust the stop finger gap. .8mm to 1.0mm 2. Ensure that the stop finger is tight up against Machined edge the machined edge to help hold it into position. Needle Bar Height Timing There are two ways to check needle bar height.
  • Page 67 2. Locate the access hole in the front right cover for the needle height adjustment. 3. Lower the needle bar to the lowest position (BDC). | 67 HQ Infinity Service Manual...
  • Page 68 4. Place a #3 flat screwdriver blade through the access hole in the front right cover and through the head frame.  NOTE: Machine cover removed in these photos for instruction purposes. 5. Provide resistance against the adjustment by holding the needle bar with your other hand so the needle bar will not fall out of the driver.
  • Page 69 1. Correctly install the needle, with the long groove straight out to the front and the needle all the way to the stop/sight hole in the needle bar clamp. 2. Locate the access hole in the front right cover for the needle height adjustment. | 69 HQ Infinity Service Manual...
  • Page 70 3. Place the cylinder height gauge on the hook shaft with the flat up, slide it on the hook shaft and roll the flat down. 4. Lower the needle bar to the lowest position. 5. With the flat down on the cylinder tool, slide the cylinder tool gently against the needle.

  • Page 71: Power

    16. Power 12. Replace the needle plate and the hook guard plate. U CAUTION: Always unplug the HQ Infinity before disassembling any part of the machine to avoid potentially dangerous or lethal electrocution, or accidentally starting the machine and causing harm to yourself or the HQ Infinity.

  • Page 72: Surge Protection/Battery Backup

    The power receptacle contains a replaceable 5A fuse (part# QM23075) located within the power entry module on the back of the HQ Infinity.  NOTE: Early Infinity machines will have a 4A fuse which may be replaced with a 5A fuse when necessary.
  • Page 73 Replace the fuse if it is blown (no continuity from one end to the other – usually the glass is blackened as well). | 73 HQ Infinity Service Manual...

  • Page 74: Electrical Wiring

    17. Electrical Wiring AC Wiring U CAUTION: High Voltage AC wiring is routed from the back panel, across the panel to the AC outlet. It is also routed to the bottom of the DC power supply. AC wiring is identified by the blue and brown wiring.
  • Page 75 (brown) should be connected to the terminal closest to the front of the machine at the bottom of the power supply. | 75 HQ Infinity Service Manual...

  • Page 76: Handlebar Switches

    18. Handlebar Switches The arrows below indicate cable connections. (Membrane switches are attached to their cables). 76 | www.HandiQuilter.com...

  • Page 77: Upper Cable Trough

    19. Upper Cable Trough A trough along the top of the Infinity arm hides the cabling coming from the main control board as well as from the power supply to the front of the machine. To access these cables, the plastic panels will need to be removed as explained in the Front Plastic Panels and Rear Plastic Panels sections.

  • Page 78: Rear Handlebars

    HQ Infinity. 4. Use a 4mm ball hex tool to remove the four screws that attach the rear handlebars casting to the back of the HQ Infinity.  NOTE: Photo shows display removed. 5. Carefully set the rear handlebars casting aside.

  • Page 79: Rear Plastic Panels

    • Far back position: 3 X M4 x 20mm • Back side positions: 4 X M4 x 16mm To remove the right rear panel 1. Remove the rear handlebars as described on the previous page. | 79 HQ Infinity Service Manual...
  • Page 80 2. Use a #1 Phillips screwdriver to remove the two screws on the left side of the rear connector plate, leaving the two screws on the right side. 3. Use a 2.5mm hex tool to remove the seven screws shown: four on the right panel and three on the left panel.
  • Page 81 2. Check the quick connect terminals on the outlet and inlet to ensure that they are fully seated. 3. Check that the main 20-pin cable assembly is fully engaged in the receptacle on the printed circuit board. | 81 HQ Infinity Service Manual...
  • Page 82  NOTE: There should be a green/yellow ground wire attached to one of the mounting screws on both the power inlet and outlet. These wires should be attached to the mounting screw with a star washer and nut. 4. Attach either of the rear panels by following the disassembly instructions above in reverse. 5.

  • Page 83: Front Plastic Panels

    Due to how the left and right front panels interlock, both sides should always be removed simultaneously. U CAUTION: Removing only the front left or right panel while the opposite side is still mounted to the machine may damage the panels. | 83 HQ Infinity Service Manual...

  • Page 84: Front Panel Screws

    Front Panel Screws  IMPORTANT: All screws are M4 (of different lengths) with washers Machines made before Machines made as of January 27, 2015 January 27, 2015 Right front cover screw (not pictured) M4 x 12 with M4 washer M4 x 12 with M4 washer Left front cover screws (when facing cover) A.
  • Page 85 The two panels should then easily pull apart from each other to be removed from the machine. | 85 HQ Infinity Service Manual...
  • Page 86 To install the front panels 1. Attach the front right panel first by aligning the openings for the tension assembly and the take- up lever with the corresponding parts on the head frame. 2. Align the slit in the panel with the screen bracket and angle the right panel slightly to fit the rear portion of the panel under the flange of the bulkhead and then gently press the panel...

  • Page 87: Power Supply

    A failed power supply will not allow power to be delivered to any of the rest of the Infinity. Therefore, you will not have any LEDs on any boards, including the green LED at the top of the 48V power supply.
  • Page 88 • Check the remote power cable for damage and make sure it is plugged in firmly at the top of the power supply as well as the J45 connector at the top of the main control board. This requires removing both left and right rear plastic panels.
  • Page 89 Green/ yellow goes closest to the outside edge, blue in the middle, and brown closest to the fan. 2. Snap the plastic terminal protector over the plastic terminal dividers. | 89 HQ Infinity Service Manual...

  • Page 90: Front Distribution Boards

    3. Taking care not to pinch any cables, place the power supply in position within the machine frame and loosely mount the four brackets using a 3mm hex tool. 4. Use a Phillips screwdriver to connect the three black wires to the three terminals farthest from the green LED side, making sure to also connect the green/yellow wire with one of the black wires as shown.
  • Page 91 3. Use a #1 Phillips screwdriver to remove the four mounting screws. 4. Set the front distribution board on a grounded ESD mat or in an ESD-safe container. | 91 HQ Infinity Service Manual...
  • Page 92 To install the front distribution board 1. Turn the rear power switch off and unplug the power cord. U CAUTION: If the power switch in the rear is on and the machine is plugged in, removing the front distribution board will cause the machine to power on, even though the front power switch may be turned off.

  • Page 93: Main Control Board

    U CAUTION: Because some of the connectors on the main control board are so close to sensitive circuitry, do not use a screwdriver to pry connectors loose. The screwdriver may slip and damage the board. | 93 HQ Infinity Service Manual...
  • Page 94 4. Use serrated needle-nose pliers to remove the two small two-pin connectors by pulling on the plastic housing as described in the previous section. U CAUTION: Do not pull on these by the wires or you will damage them. Use pliers to remove these two-pin connectors.

  • Page 95: Main Control Board Leds

    The LEDs on the control board are helpful in troubleshooting issues that may occur in the HQ Infinity. Nonfunctioning LEDs can be an indicator that the electronics pertaining to that particular LED should be inspected and replaced as needed. | 95 HQ Infinity Service Manual...

  • Page 96: Front Rs232 Connection

    Front RS232 Connection These two LEDs, labeled Rx and Tx, will flash when the front display board is communicating with the main control board. Normal Operation • Both LEDs will flash periodically when the front Display is connected. When the display is being used (touched), they will flicker fast until the user stops using the display.

  • Page 97: Pro-Stitcher Rs232 Connection

    Pro-Stitcher computer. Normal Operation • With the Pro-Stitcher plugged into the Infinity and both systems booted up, the Rx and Tx LEDs should be flickering continuously. With no Pro-Stitcher connection, the LEDs will be off. Faulty Operation Symptoms •...

  • Page 98: Rear Display Usb Connection

    Rear Display USB Connection This LED indicates that the USB hub on the control board is connected to a USB host (in this case, the rear display). Normal Operation • The LED is on solid when a rear display is connected (power and USB). Faulty Operation Symptoms •...

  • Page 99: Rear Display Rs232 Connection

    Normal Operation • When the Infinity boots up, this LED should be on. Faulty Operation Symptoms • The LED will be off if the hub is not functioning properly.

  • Page 100: Main Shaft Encoder Led

    Main Shaft Encoder LED (Test 1) Normal Operation • The TEST 1 LED will turn ON when the main shaft encoder transitions to the OPEN region of the encoder disk. It will turn OFF when it transitions to the CLOSED portion as the disk passes through the optical encoder.

  • Page 101: Thread Break Sensor Led

    Replace the sensor and/or adjust the disc as needed. (See the Main Shaft Encoder Sensor section of this manual. Thread Break Sensor LED (TEST 2) Normal Operation • This LED should flash ON when the check spring in the thread tensioner passes the green thread break sensor. | 101 HQ Infinity Service Manual...

  • Page 102: Heartbeat Led

    Faulty Operation Symptoms • LED is constantly ON or OFF, but does not LED flashes at this point trigger when the check spring passes the sensor. • The Thread Break Sensor alarm is being triggered when the thread is NOT broken. Corrective Measures LED is off •...

  • Page 103: Test 3 Led

    If any of these LEDs are not on, there will likely be some other type of failure on the Infinity. Troubleshoot any issues with these LEDs the same as the Heartbeat LED (#8). Follow those instructions to determine if...

  • Page 104: Led Boards

    26. LED Boards LEDs are designed to provide bright light for an extended period of time when compared with other lighting sources. If some of the LEDs begin to fail over time, the LED boards are designed to be replaceable. Generally speaking, it is rare for an entire board of LEDs to fail all at once.

  • Page 105: Hook Led Board

    To remove the left or right handle LED board 1. If the handles are mounted to the HQ Infinity, first rotate the handles down to the lowest position to more easily access the boards. 2. Disconnect the cable from the LED board. Then use a #1 Phillips screwdriver to remove the two Phillips M3 screws from the LED board.

  • Page 106: Hook Led Cable

    Hook LED Board (QM23022) U CAUTION: Electronic components can be damaged by Electrostatic Discharge (ESD). Follow all ESD precautions in the Electrostatic Discharge (ESD) section at the front of the manual while handling the hook LED board. To remove the hook LED board 1.
  • Page 107 Make sure the cable stays in the trough in the lower arm. Otherwise, follow the steps below. Guide the cable into this channel 1. Thread one end of the hook LED cable through the right-side trough under the Infinity, just behind the hook. 2. Push it back toward the main control board until you can see the cable through the slot below the motor.

  • Page 108: Led Ring

    5. Pull gently on the hook LED cable up through the slot under the motor to remove any slack. Look under the machine to verify the cable is staying in the trough and not rubbing against the hook shaft. 6. Mount the cable to the inner side of the casting as shown with a #1 Phillips screwdriver, using the plastic P-clip.

  • Page 109: Thread Tension Sensor And Motor

    (See To remove the thread tension motor in section 27, Thread Tension Sensor and Motor.) 1. Remove the front plastic panels. (See To remove the front plastic panels in section 22, Front Plastic Panels.) | 109 HQ Infinity Service Manual...
  • Page 110 2. Use a #1 Phillips screwdriver to remove the two M3 screws from the sensor board. 3. Pull the sensor board out of the head frame and carefully disconnect the two cables from the board. To install the thread tension sensor board  NOTE: It may be easier to install the thread tension sensor board if the thread tension motor is out of the way.

  • Page 111: Thread Tension Motor

    It is not necessary to remove the 8-pin cable from the sensor board if the board is not being replaced). 3. Remove the two M3 screws from the tension motor housing using a #1 Phillips screwdriver. 4. Gently remove the tension motor from the head frame. | 111 HQ Infinity Service Manual...

  • Page 112: Thread Break Sensor

    To install the thread tension motor Check the orientation of the thread tension motor shaft to be sure it aligns with the slot in the plastic thread tension nut in the head frame. The motor Align wires should exit the motor at the top left (10:30 position).
  • Page 113 7. Press in or out as needed until the green end of the sensor almost hits the tensioner check spring. 8. Test the sensor by pulling the thread straight down and watching for a yellow LED on the back of the sensor (through the hole on the left side of the head frame). | 113 HQ Infinity Service Manual...
  • Page 114 9. Adjust the sensor if necessary (if the LED is constantly on and will not turn off, the sensor is too close to the tension discs. If it will not trigger on when the thread is pulled, the sensor should be adjusted closer to the check spring).

  • Page 115: Needle Laser

    1. Remove the front plastic panels. (See To remove the front plastic panels in section 22, Front Plastic Panels.) 2. Turn on the Infinity, but take care to not short anything out on the front distribution board while it is on. Make sure you do not accidentally start the machine.
  • Page 116 5. While holding the screw protruding from the laser post, twist the post or slide it in or out as needed until the laser dot is aligned with where the needle pierces the quilt. To remove the needle laser 1. Remove the front plastic panels. (See To remove the front plastic panels in section 22, Front Plastic Panels.) 2.
  • Page 117 The laser and mounting post come preassembled. 1. Place the laser post in place at the front of the head frame with the wires up and the laser lens down pointed toward the needle. | 117 HQ Infinity Service Manual...
  • Page 118 2. Use a #1 Phillips screwdriver to attach the laser mounting clip with the two Phillips screws as shown. Keep the screws loose so you can still adjust the laser post. 3. Plug the laser cable into the 2-pin connector on the front distribution board.
  • Page 119 8. Tighten the two Phillips screws to hold the laser in position. 9. If the laser moves while tightening the screws, either loosen the screws and try again, or follow the previous instructions for adjusting the needle laser. | 119 HQ Infinity Service Manual...

  • Page 120: Main Shaft Encoder Sensor

    29. Main Shaft Encoder Sensor (QM23002) The Main Shaft Encoder is used to detect the needle up and down positions. It consists of the optical encoder (QM23002) that mounts to the upper extrusion and the encoder disk that mounts to the main shaft at the rear of the machine. If the needle is consistently not stopping in the proper position (i.e.
  • Page 121 (The needle should be on its way back down, but the tip of the needle should still be well above the hopping foot.) | 121 HQ Infinity Service Manual...
  • Page 122 5. Rotate the encoder disc, making sure it stays centered between the forked sensor, just until the Test 1 LED on the main control board (left-most LED in the bank of 4 LEDs) turns green. 6. Tighten the set screw at the top of the encoder disc collar with a 2mm hex tool.
  • Page 123 4. Use a 5mm hex tool to remove the two lower idler pulleys, being careful not to lose any spacers. Â IMPORTANT: Note which side of the pullleys the flange is on so you don’t mix up the spacers during reassembly. | 123 HQ Infinity Service Manual...
  • Page 124 5. Use the 5mm hex tool to remove the six bolts that mount the rear bulkhead to the machine. 6. Remove the top channel plastic insert by gently prying upward, being careful not to damage any of the cables in the channel. 7.
  • Page 125 It may be necessary to tap lightly on the side of the bulkhead with a rubber mallet if it is really tight. Push 11. Use a 2.5mm hex tool to loosen the two sensor mounting bolts. | 125 HQ Infinity Service Manual...
  • Page 126 12. Using some long needle nose pliers, gently pull the sensor upward while guiding the cable through the opening in the metal casting. Be careful not to damage the tips of the forked sensor as this is where the optics are located. 13.
  • Page 127 You should be pulling the end of the guide wire at the same time to pull the encoder cable back through the proper cable path into the region of the main control board. | 127 HQ Infinity Service Manual...
  • Page 128 5. Use a 2.5mm hex tool to tighten the main shaft encoder down into the proper position. (See To adjust the main shaft encoder disc earlier in this section for proper positioning.) 6. Remove the guide wire/string from the sensor cable and plug the sensor cable into the J42 connector on the main control board.
  • Page 129 13. Follow the instructions in the Main Shaft Encoder Disc Adjustment section to set the disc in the proper position. 14. Snap the top plastic channel insert into position. | 129 HQ Infinity Service Manual...

  • Page 130: Stitch Regulator Y Encoder

    Y-encoder cable is plugged into connector J26. To remove the Y-encoder 1. Gently lay the Infinity on its side, taking care not to damage the handles or the plastic panels. 130 | www.HandiQuilter.com...
  • Page 131 3. Carefully pull the rear axle assembly outward away from the Infinity body. There is a cable attached to the Y encoder that will likely pull loose as you do this. If it does not detach on its own, reach in behind the encoder and disconnect the cable.
  • Page 132 7. Use a 0.05" hex tool to loosen the set screw on the optical disc collar. 8. Carefully pull the optical disc off the axle. 9. The rear housing piece can be replaced if desired, but is not likely to be necessary. Remove the two Phillips screws shown to remove the rear housing.
  • Page 133 Y-encoder. | 133 HQ Infinity Service Manual...
  • Page 134 7. Plug the Y-encoder cable into the Y-encoder as shown. 8. Mount the rear axle assembly to the machine using a 3mm hex tool to loosely attach the 8 screws previously removed. 9. Tighten the four screws on the hub closest to the Y-encoder. (These screws are in nonadjustable mounting holes.) 10.

  • Page 135: Drive Motor

    To install the drive motor 1. Follow the instructions for removing the motor in reverse. 2. Tighten the four motor plate bolts. (See To adjust motor to hook shaft drive belt tension in section 11, Belt Tension.) | 135 HQ Infinity Service Manual...

  • Page 136: Troubleshooting

    31. Troubleshooting No Lighting Corrective Measure(s) The user turned off the lights. • Select the Lights icon on the toolbar and ensure the lights are enabled on the Lighting screen. Short circuit on one of the LED boards. This • With the power off, unplug all four of the LED cables will cause the LED at the top of the front from the front QM23005 board: QM23005 board labeled +48B to be very dim...
  • Page 137 Replace the motor encoder cable if needed (QM23071). If the motor wires are damaged, the entire drive motor will need to be replaced (QM23001). For more information, see Section 30, Drive Motor. | 137 HQ Infinity Service Manual...
  • Page 138 • Replace the motor according to the instructions in Section 30, Drive Motor. Front display will not completely boot. It Corrective Measure(s) freezes before getting to the Infinity console screen. The display memory may have been • The display will need to be re-imaged at the factory.
  • Page 139 LED boards in the handles. For the rear handles, the plug is in the center of the handlebar casting (on the bottom side). The Infinity will not turn on. Corrective Measure(s) No AC power. • Check the wall outlet with a volt meter and make sure power is available.
  • Page 140 The Infinity will not turn off from the front Corrective Measure(s) switch. The front switch cable is disconnected or • Check to be sure the front switch cable is plugged into damaged. the top of the control board as well as the top of the power supply.

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