handi quilter HQ Stitch 710 Service Manual Download Page 85

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Diagnostic Test 08 / FC (Foot Control)

When test 08 is selected, the LCD displays

“08” and “FC”. Attach the foot control to the

machine. Depress the foot control as far as it

goes and then release it.

The foot control symbol appears when the

foot control is attached.

Buzzer sounds when the foot control is deeply

depressed or released.

Buzzer sounds when the foot control is

connected or disconnected.

3. Fault note:

If the control symbol does not

appear or the buzzer does not sound.

See Diagnostics Appendix 08 for more

information.

Summary of Contents for HQ Stitch 710

Page 1: ...Service Manual 05 29 18 HQ Stitch 710...

Page 2: ...Part 2 Needle Plate Micro switch Thread Tension Unit Adjustments Automatic Thread Cutter Removal Adjustments and Installation Stretch Stitch Feed Balance Parts of the Front Panel Printed Circuit Board...

Page 3: ...84 85 86 87 88 89 Table of Contents cont Edit Notes 11 03 16 page 47 1 added note that tool blade is 2 5mm and can be used as gauge 11 03 16 page 49 added circled around gap on black tension release 1...

Page 4: ...e cutter Do not pull up on one outer edge with your finger or screw driver because this will break off the outside edges of the cutter 1 3 Important Note Do not try to remove this screw It adjusts the...

Page 5: ...ull the thread firmly into the pre tensions as shown in the winding the bobbin section of the user Instruction Book You should feel a good pre tension on the thread when winding a bobbin or the machin...

Page 6: ...reads showing above the nut as shown in the image below Visual Checks By looking at the pre tension screw one can see if the screw has been adjusted in clockwise and is low in the little cover over th...

Page 7: ...chine 4 With the handle up start to lift up on the left side of the top cover As you lift up be careful of the clips that hold the top cover firmly to the front panel see three clips circled in red Co...

Page 8: ...you Note the screws on the left are self tapping screws with coarse threads going into plastic The screws on the right are machines screws with fine threads going into metal 3 Remove the four self tap...

Page 9: ...e Remove these two set screws Machine screws with fine threads 2 First pull down on the end of the cover and second very gently start to slide the bed cover to the left Be careful how you pull it beca...

Page 10: ...upright Lift up on the handle and loosen the small washer screw a couple turns directly under the handle on the right side 3 Remove the Phillips screw directly under the hand wheel 4 Carefully start...

Page 11: ...sting Loosen this screw a couple turns but do not remove it 2 Loosen a couple turns but do not remove the Phillips head washer screw at the upper right side of the front panel 3 With the belt cover re...

Page 12: ...flat head screwdriver gently push down on the open holes of the casting directly behind the upper shaft This is where the front cover meets the rear cover As you pull out on the front panel push down...

Page 13: ...and the 4 circled wire connections stay connected to the board and front cover when it is removed Important note Always grab the wires from each connector as a group and pull straight outward Never gr...

Page 14: ...ntly lay the machine on its back Locate the pin with a spring and c clip just to the left of the silver feed cam fork on the bottom of the machine 3 Using the butt end of your screwdriver firmly push...

Page 15: ...on the end of the free arm The cover comes off easier if this washer screw is removed rather than loosened This is an exception to the rule of only loosening washer screws a couple turns rather than...

Page 16: ...ion 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 lubric...

Page 17: ...brication 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 lu...

Page 18: ...Oil Put a drop of oil on the following 1 The presser bar at the bottom bushing inside the left hinged cover 15...

Page 19: ...Oil Put a drop of oil on the following 2 The top and bottom of the needle bar at the bushings inside the left hinged cover 16...

Page 20: ...Oil Put a drop of oil on the following 3 The needle bar support top hinge pin oil orifice seen after removing the top cover and the presser bar pressure adjusting knob 17...

Page 21: ...Oil Put a drop of oil on the following 4 The take up lever crank at the pitman on both sides of the crank seen through left hinged cover and after removing the top cover 18...

Page 22: ...Oil Put a drop of oil on the following 5 The take up lever connecting rod between the crank and the needle bar driver Oil at both ends inside the hinged cover 19...

Page 23: ...on the following 6 Each side of the main shaft bearing at the pitman side and the collar side where play is taken out at the collar seen after removing the top cover Note The back bearing is a permane...

Page 24: ...Oil Put a drop of oil on the following 7 The hook felt under the needle plate and the bobbin case 21...

Page 25: ...Oil Put a drop of oil on the following 8 The bottom feed slider block and felt seen from the top of the free arm after removing the two bottom covers and the free arm cover 22...

Page 26: ...Oil Put a drop of oil on the following 9 The upper feed shaft oil felt found on the upper right rear of machine after removing the top cover 23...

Page 27: ...Oil Put a drop of oil on the following 10 The three oil felts near bushings on the lower timing shaft seen after removing the two bottom covers and the bottom free arm cover 24...

Page 28: ...Oil Put a drop of oil on the following 11 The two pivot points on the bottom feed shaft seen after removing the two bottom covers and the bottom free arm cover 25...

Page 29: ...small amount of grease on the following 12 The lower shaft hook timing gear if needed Make sure all lint is cleaned out of the gear first seen after removing the left bottom cover of the bottom free...

Page 30: ...Grease Put a small amount of grease on the following 13 The feed fork and eccentric center bottom of machine seen after removing the left bottom cover and the bottom free arm cover 27...

Page 31: ...Grease Put a small amount of grease on the following 14 The white eccentric on the back of the pitman clean first if dry dirty or linty seen after removing the top cover 28...

Page 32: ...nd move the gauge If the feed stepper motor is set for 0 the feed dogs will only go up and down and will not feed 3 Now flip the gauge so side B is facing up at the rear of the feed dogs and rotate th...

Page 33: ...threaded screw i e turn it clockwise to loosen it located just right of the shiny Phillips screw from the previous adjustment 7 To make an adjustment locate the small empty threaded access hole on th...

Page 34: ...lack collar and retighten with a 2mm tool 11 Recheck the height using the feed dog height gauge at the front of the feed dogs Set the gauge with side A facing up Rotate the hand wheel toward you If th...

Page 35: ...d loosen the set screw with a 2mm tool on the presser bar block Grab the presser bar and move it up or down accordingly then lightly tighten the screw Recheck using the gauge 3 Before tightening the s...

Page 36: ...th a 2mm tool the set screw that is holding the needle bar supporter in place Now pivot the needle bar supporter toward the front or back to center it with the needle plate hole then tighten the screw...

Page 37: ...is equidistant form the left and right side of the needle plate slot on full zigzag 34 Important note When needle position is changed left to right it will also change the hook timing to the needle W...

Page 38: ...point reaches the top of the needle plate in its downward motion At this point the feed dogs should be on their way down and be just above the needle plate The feed dogs will continue down and be all...

Page 39: ...t of the way 2 Slide the timing belt off of the lower shaft gear 3 Turn the hand wheel toward you so the tip of the needle is touching the surface of the needle plate Never turn the hand wheel backwar...

Page 40: ...flush with the top of the needle plate when going in their downward sewing motion rotation 6 While firmly holding the hand wheel in place with one hand slide the timing belt onto the lower shaft with...

Page 41: ...with the black post sticking out toward you Be sure the gauge is all of the way up into the needle bar 3 Insert the 9mm radial timing gauge 202112101 from HQ Stitch tool kit SM49280 Make sure the tip...

Page 42: ...istance against the adjustment by holding onto the needle bar with one hand locate and loosen the hex screw with a 2mm hex tool on the block that holds the needle bar in place This is the larger of th...

Page 43: ...Needle to Hook Clearance 1 of 2 40 This is what we are looking for 0 0 1mm clearance between the hook and the needle...

Page 44: ...ee large Phillip s head screws on the hook base plate Loosen and re snug the third pivot point screw This will provide resistance against the adjustment Then loosen the other two screws 3 Push the pla...

Page 45: ...tment is needed locate and loosen with a 2mm hex tool the hex set screw that holds the lower shaft eccentric bushing in place 3 Using a small flathead screwdriver move the bushing either up or down Mo...

Page 46: ...ike a needle with no eye or point 2 Make sure the tip of the hook touches the bent down tab of the gauge This is necessary for both proper timing checks and adjustments 4 Turn the hand wheel toward yo...

Page 47: ...gon screws holding the timing gear to the lower shaft 6 Using a 2 5mm hex screwdriver loosen both screws While holding the hand wheel use your screwdriver as leverage to adjust hook timing and tighten...

Page 48: ...does not line up with the needle eye left to right loosen the screw on the front of the threader plate with the small 0 2 Phillips screwdriver QM10273 Move the threader plate to the left or right unt...

Page 49: ...justing dial to 0 If you have the belt cover removed turn the dial all way counter clockwise and then three clicks clockwise 3 Do each step below in order from a g 46 a Lower the presser bar and foot...

Page 50: ...two hexagon set screws located near the hand wheel and bobbin winder assembly that holds the upper feed upper shaft unit in place with a 2mm hex tool 47 4 Using step gauge QM39401 check the clearance...

Page 51: ...ot front to back freely Move the moving part of the presser foot until it measures 4mm 7 Using step gauge QM39401 check the clearance between the dual feed foot and the upper feed dog The clearance sh...

Page 52: ...should be a very tight fit inside the gap or just not fit into the gap 2 If an adjustment needs to be made locate and loosen the hex set screw that holds the linkage in place with a 2 5mm hex tool 3 R...

Page 53: ...tment needs to be made loosen the two 2mm hex screws and move the bracket up or down accordingly 3 Note that there are small tabs on both the zigzag left and straight stitch right needle plates The po...

Page 54: ...en the small Phillips screw directly behind the c clip and pivot the silver post left or right accordingly 2 Reset the tension by turning the small silver flat head screw on the side of the unit all t...

Page 55: ...the thread cutter will want to fall so make sure you hold it in your hand The thread cutter will still be held to the machine by wires so be careful not to pull it away 2 To separate the thread cutte...

Page 56: ...le without it touching 5 If the thread cutter has trouble cutting such as not cutting the top or bobbin thread or the thread is cutting too short or too long loosen the small Phillips screw that holds...

Page 57: ...clip 8 Follow the wires along the bottom of the machine and cut all of the zip ties that hold the wires to the machine then unplug the connector from the A board When reinstalling carefully route the...

Page 58: ...black post of the step motor must fit into the access hole of the thread cutter plate Tighten the two screws To ensure the thread cutter is connected correctly push the long extending blade all of the...

Page 59: ...CD displays Press the 8 key 3 Set the stretch stitch balance dial straight up and down as shown 4 Using the F satin stitch foot and with the machine threaded and ready to sew press the start button an...

Page 60: ...th a 2mm hex tool turn the screw clockwise to make the stitch longer or counter clockwise to make the stitch shorter Do not loosen the lock nut Note The photo is shown with base cover off However this...

Page 61: ...ntal LED Light 2 Slide Volume Speed Control 3 Circuit Board L1 Horizontal LED Light 4 Circuit Board A 5 Circuit Board F Thread Cutter Needle Up Down Lockstitch Reverse Start Stop 5 1 2 3 4 58 See page...

Page 62: ...sets of wires on the upper right side of the board On all wires excluding the flexible cable in step 1 ideally grasp the connector and not the wires to avoid cable damage Alternatively grasp the cable...

Page 63: ...ONTROLLER FEED DOG DROP STEP MOTOR PRINTED CIRCUIT BOARD F SLIDE VOLUME SPEED ZIGZAG STEP MOTOR TENSION UNIT SOLENOID POWER SUPPLY UNIT yellow orange red and brown 4 conductor with white plug DC MOTOR...

Page 64: ...es of the touch panel sheet with your hand to release it from the panel 61 Touch Panel Replacement 1 of 2 3 Attach 1 8 inch double stick tape on the sides and top of the new touch panel sheet 4 Before...

Page 65: ...ps screws 6 Lay the A board back into position and replace the three Phillips screws Next plug the four connectors and the flexible cable back into the A board 62 Touch Panel Replacement 2 of 2 7 Next...

Page 66: ...lug with the wires wrapped in clear tubing at the bottom of the A board 3 Locate and remove the two Phillips screws that hold the motor to the machine Carefully remove the motor 4 Replace the motor an...

Page 67: ...the plastic wire guide in place and remove the guide 3 Unplug the wire toward the top of the power supply 1 Remove the three Phillips screws that hold this unit to the machine Once removed the unit w...

Page 68: ...careful not to pinch the wires 5 Set the guide into place Before tightening the washer screw lightly pull on the wires verifying they are not pinched 6 Plug the wire back into the power supply 65 Swi...

Page 69: ...from the inside of the free arm 2 Important Be sure to push down on the end of the cover while pushing in the cover This will hook the clip to the underside of the thread cutter securing it in place...

Page 70: ...ur way up Then attach the front panel ensuring there are no gaps between the covers Note the small yellow wire for the top tension solenoid is the tightest fit make sure it and all other wires are sec...

Page 71: ...front of the handle on the right side 5 Gently lay the machine down and tighten the two Phillip s head screws that hold the bottom of the panel to the casting 4 Looking through the right side of the m...

Page 72: ...lation 69 2 1 Guide the bed cover into position Be careful how you pull it because there are wires underneath and you do not want to scratch or cut them 2 Replace the two set screws that hold the cove...

Page 73: ...Phillip s head screw directly under the hand wheel 3 Lift the handle up and tighten the small Phillip s head screw on the right hand side at the top of the belt cover 4 Gently lay the machine down on...

Page 74: ...the machine base plate without scratching it lift the end of the machine up slightly by grabbing the free arm and fit it into position Replace the four self tapping set screws 2 Reinstall the base cov...

Page 75: ...tabs into the front cover 2 Replace the two set screws that hold the front cover to the machine The smaller of the two screws goes directly under the horizontal spool pin 3 Lift up the handle and rep...

Page 76: ...up down lockstitch buttons turn the machine on 2 Four dashes will appear on the screen Press the lockstitch button 3 After pressing the lockstitch button TP t1 will appear on screen 4 Using a stylus p...

Page 77: ...e LCD to get t3 6 Next press the top right corner of the LCD for t4 7 Next press the middle of the start over button to get t5 8 Press the middle of 2 to complete touch screen calibration You will see...

Page 78: ...ons turn the machine on 2 After appears on the screen release the buttons 3 Press the 1 key to proceed 4 After pressing the 1 key the buzzer sounds the LCD displays symbols and blinks and the Start St...

Page 79: ...ton to see which number tests failed no failures 00 2 Press the thread cutter F1 should display press needle up down F2 should display and press lock stitch button and F3 should display The buzzer sho...

Page 80: ...BH symbol 3 When the lever is all of the way down and not touched the slit in the shield plate should be as close to the middle of the sensor as possible 4 If you need to make an adjustment locate th...

Page 81: ...Phillip s set screw that holds the micro switch in place Move the unit to the right accordingly then tighten the screw If an adjustment is made push the bobbin winder to the left and to the right maki...

Page 82: ...wn The 05 will be displayed along with the foot icon Lift the presser foot to its normal up position the buzzer should sound 3 The LCD displays the down arrow when the foot is down 4 Open the face pla...

Page 83: ...t of the fabric this is when the machine does not feed the fabric 2 Raise the needle bar from its lowest to its highest position The buzzer sounds and the LCD displays the stitch width symbol The LCD...

Page 84: ...get its default position buzzer does not sound LCD Displays E1 Adjust the lower shaft shield position or see Diagnostics Appendix 07 2 Lower the needle bar to its lowest position The stitch length sy...

Page 85: ...it goes and then release it 2 The foot control symbol appears when the foot control is attached Buzzer sounds when the foot control is deeply depressed or released Buzzer sounds when the foot control...

Page 86: ...ound and arrow mark appears at the left most positon 3 Fault note Buzzer does not sound the arrow marks are in the opposite position or the arrow marks do not appear See Diagnostic Appendix 09 for mor...

Page 87: ...the presser foot must be down 2 Press the needle up down button Machine runs slow then fast and the needle bar stops at the highest position 3 Fault note The machine motor does not start The motor ru...

Page 88: ...closed regular when the solenoid is off 3 Look at the solenoid When activated the solenoid will retract the plunger If this does not work properly when you cut the thread the thread will abruptly pop...

Page 89: ...rd you to raise the needle bar to its highest position Press the needle up down button 2 Press the needle up down button The thread cutter symbol will blink and the thread cutter motor will be initial...

Page 90: ...the drop feed lever is turned to the left or to the front of the machine the feed dogs are down and the LCD displays the up arrows above the feed dog symbol indicating the way the feed dogs will go w...

Page 91: ...top of the surface of the silver microswitch bracket and bottom surface of the needle plate should be 11 5mm If an adjustment needs to be made loosen the two 2mm hex screws and move the bracket up or...

Page 92: ...Appendix II Diagnostic Tests 89...

Page 93: ...position Before starting the diagnosis test Check or replace the following part s if nothing happens when the power switch is turned on 1 The connectors are connected properly refer to page 7 2 Replac...

Page 94: ...isplays F1 when button 1 is pressed LCD displays F2 when button 2 is pressed LCD displays F3 when button 3 is pressed LCD displays 03 and BH When the buttonhole lever is pulled buzzer sounds and LCD d...

Page 95: ...down button If the result is correct condition press the start stop button to proceed the next step If the result is defective condition press the reverse stitch button to proceed the next step LCD di...

Page 96: ...trol is deeply depressed or released Buzzer sounds when the foot control is connected or disconnected LCD displays 09 and Slide 10 DC motor Buzzer sounds and mark appears at the leftmost position Buzz...

Page 97: ...step If the result is defective condition press the reverse stitch button to proceed the next step LCD displays 13 and feed dog symbol When the drop feed lever is turned to the right LCD displays as F...

Page 98: ...39 and fix the defective part The defective test number You can toggle thru to see the failed test numbers by pressing the start stop button Turn the power switch off when the self diagnostic test is...

Page 99: ...upplement Mechanical Adjustments This supplement covers the same information contained in this service manual Use it as necessary for further clarification about making adjustments to the HQ Stitch 71...

Page 100: ...Needle drop position 13 Presser bar height 14 Hook timing 15 Needle bar height 16 Clearance between needle and tip of the rotary hook 17 18 Presser bar lifter switch position 19 Backlash between hook...

Page 101: ...reverse Setscrew A Face cover Top cover To remove 1 Raise the carrying handle Remove the setscrew B Close the carrying handle Setscrew B Top cover Setscrew C Setscrew D 2 Open the top cover Remove the...

Page 102: ...crew A Setscrew A Setscrew A Machine base Base cover To remove 1 Remove the setscrews B 2 Remove the base cover To attach 1 Follow the above procedure in reverse Setscrew B Setscrew B Setscrew B Setsc...

Page 103: ...e plate Needle plate release lever Needle plate Changing External Parts 4 2 Remove the setscrew and pin 3 Unlock the hook A inside of the machine base and B edge of the free arm 4 Slide the free arm c...

Page 104: ...machine base Setscrew B Setscrew C Setscrew D 3 Loosen the setscrew B inside of the top cover 4 Loosen the setscrew C inside of the face cover 5 Loosen the setscrew D inside of the belt cover 6 Unlock...

Page 105: ...crew A Changing External Parts 6 Setscrews A Setscrews B Setscrews C Setscrews C Rear cover D E 3 Remove the setscrew B 4 Remove the setscrews C Unlock the rear cover hook from the front cover 5 Push...

Page 106: ...rinted circuit board A To attach 1 Follow the above procedure in reverse Be sure that the connector post on the printed circuit board to which it is connected Position the connector correctly then pus...

Page 107: ...ont cover see page 5 2 Disconnect the connectors from the circuit board A see page 7 3 Remove the CS rings 4 Remove the setscrews and the circuit board F To attach 1 Follow the above procedure in reve...

Page 108: ...t the power supply connector from the switching power supply unit 4 Remove the foot control connector from the printed circuit board A 5 Remove the setscrews B and switching power supply To attach 1 F...

Page 109: ...etscrews 2 pcs and the driving motor Replacing electronic components To attach 1 Attach the driving motor Tighten the setscrews temporarily 2 Adjust the motor belt deflection to about 5 mm by pressing...

Page 110: ...over see pagesf 1 and 2 2 Remove the front cover see page 5 3 Disconnect the Solenoid 1 thread tension release connector from the printed circuit board A see page 7 4 Remove the setscrews A and B Remo...

Page 111: ...ot lowered 4 Turn the handwheel toward you to raise the feed dog at its highest position 5 Loosen the setscrew A 6 Loosen the nut Adjust the feed dog height to 0 85 mm by turning the adjusting screw B...

Page 112: ...he needle drop position The direction of eccentric pin should be as shown as fig 2 4 Tighten the hexagonal socket screw Check the hook timing and the needle bar height after this adjustment see page 1...

Page 113: ...oot A Slot Setscrew To adjust 1 Attach the zigzag foot A 2 Drop the feed dogs 3 Raise the presser foot with the presser foot lifter 4 Open the face cover Loosen the setscrew on the presser bar suporte...

Page 114: ...n the power switch ON Select straight stitch Set the needle drop position at 0 0 Do not turn the switch OFF 4 Remove the presser foot the needle plate and the bobbin holder see page 4 Cover the needle...

Page 115: ...just the the needle bar height Tighten the hexagonal socket screw Be careful not to turn the needle bar 7 Attach the bobbin holder needle plate Hexagonal socket screw Needle setting groove Tip of hook...

Page 116: ...eedle plate when removing 3 Attach the master needle 4 Turn the power switch ON Select the zigzag stitch pattern 9 Adjust the stitch width at its maximum 9 0 Needle plate hole Setscrew Needle bar supp...

Page 117: ...ve the hook base plate 5 Turn the handwheel toward you Adjust the clearance between the needle and the tip of the rotary hook by moving the hook base plate up or down between 0 1and 0 05 mm at the bot...

Page 118: ...e presser bar is at normal up position the The presser foot symbol appears When the presser bar is at lowered position the presser foot symbol disappears When the presser bar is at the extra lifted po...

Page 119: ...see page 4 Cover the needle plate with the fabric to prevent damaging the needle plate when removing 3 Turn the handwheel toward you so the the tip of the rotary hook is within the width of feed dog a...

Page 120: ...d you until PH changes to q to w on LCD 4 The needle height should be 7 2 to 8 2 mm above from the surface of the needle plate If not adjust the upper shaft shield position To adjust 1 Remove the mach...

Page 121: ...50 at the speed of 110 mm sec with the tension at AUTO Be sure the presser foot is lowered 1 Set the thread tension dial to AUTO 2 Open the face cover Adjust the tension by turning the thread tension...

Page 122: ...the needle threader plate line the groove up with the pin B and push it up to snap it To adjust 3 If the hook on the threader plate touches the left or right side of the needle eye loosen setscrew C a...

Page 123: ...page 4 You may use a fabric to prevent damaging the needle or the presser foot holder when removing the needle plate 2 Loosen the hexagonal bolt Adjust the distance between the lower part of thread d...

Page 124: ...tion is set at raised position 5 Check if the clearance between the upper feed link shaft and upper feed lower shaft is 2 5 mm If not follow the procedure on page 27 View from the base cover side 2 5...

Page 125: ...the power switch off 6 The clearance between the dual feed foot and upper feed dog should be 4 mm If not follow the procedure below To adjust 1 Remove the top cover see page 2 2 Loosen the hexagonal...

Page 126: ...ised position 6 Lower the presser foot Turn the power switch off 7 Raise the toe of the dual feed foot in the direction of arrow as Fig 3 Keep the toe of the dual feed dog raised Mechanical adjustment...

Page 127: ...ser foot Turn the power switch off Turn the handwheel toward you to raise the needle 2 Open the face cover Loosen the setscrew You can lower the buttonhole lever half way if necessary You may insert t...

Page 128: ...ight so the Buttonhole lever slightly touches to the Buttonhole foot Tighten the setscrew To check 1 While pressing the needle up down and lock stitch buttons turn the power switch on The LCD display...

Page 129: ...page 3 4 2 Turn the power switch off Slide the moving cutter to the right with your finger 3 Turn the power switch on The moving cutter motor is initialized and moving cutter moves to its home positio...

Page 130: ...power switch on The LCD display Press 4 key to enter the solenoid test mode 2 Press the needle up down button to release the thread tension The LCD will display on Make sure the needle thread in the t...

Page 131: ...ition Turn the adjusting acrew in the direction of A if the measurement is more than 39 mm Turn the adjusting screw in the direction of B if the measurement is less than 33 mm 5 Press the right arrow...

Page 132: ...ve the base plate up or down to adjust it Tighten the setscrews TP firmly after the adjustment The actuator of the micro switch should be alighed with the needle plate sensor knob as shown in fig 3 To...

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