Motorola LH4-B800E, HE-8000 I instruction manual Cause Needle is incorrectly installed

Page 99

16. TROUBLESHOOTING

Problem

Needle breaks

Presser foot pulse motor is out of step.

Upper shaft cannot be turned manually.

Sewing machine does not start after emergency stop.

Cause

Needle is incorrectly installed.

Needle and rotary hook timing is incorrect.

Buttonhole width or length is incorrect.

Upper thread scissors do not open smoothly.

Upper thread scissors position is incorrect.

Upper thread scissors installation is incorrect.

Bobbin is spinning loosely.

Loop spreader and rotary hook are touching.

Emergency stop switch has not been released.

Check

Needle position

Needle and rotary hook timing

Work clamp

Upper thread scissors opening

Upper thread scissors position

Clearance between upper thread scissors and work clamp

Bobbin insertion method

Thread trimmer mechanism position

Emergency stop switch

Remedy

Page

 

 

 

 

Install the needle

57

correctly.

 

 

Adjust the timing of the

72

needle and rotary hook.

Replace the work

clamp.

Adjust the upper thread

75

scissors opening timing.

Adjust the position of the upper thread scissors.

Install the upper thread

74

scissors correctly.

 

 

Insert the bobbin

60

correctly.

 

 

Move the thread trimmer

30

mechanism to the home

position.

 

 

 

Turn the machine pulley

 

backward to set the needle

30

bar to the needle

up position and then return

to the home position.

 

 

 

Turn the emergency stop

64

switch knob to release it.

Cutter position is incorrect.

Cutter blade damaged. Upper thread scissors do not open smoothly and touch cutter.

Cutter position

Upper thread scissors opening

Adjust the cutter to the

 

center of the needle plate

 

cutter groove.

 

Adjust the upper thread

75

scissors opening timing.

92

HE-8000

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Contents LH4-B800E HE-8000 Safety Instructions Environmental requirements Sewing Moving parts may cause injury Contents Changing Functions Using Name of Each Part Safety devicesSpecifications SubclassHE-8000 Standard sewing pattern list Standing operation pedal Optional PartsSpecial needle plate Leg partsTape guard RulerAuxiliary table Programmer Replacement parts set for 70 mm buttonhole lengthPower table InstallationVertical positioning Installing the flange nut Installing the motorInstalling the control box Installing the bed base Installing the power switchInstalling the head rest Installing the machine headInstalling the operation panel Connecting the cords Connecting the ground wireConnecting the machine head harness Connect the connectors of the feed motor harness Connecting the motor harnessConnecting the power cord Connecting the standing pedal harness option Installing the transformer Floor installationTable leg installation treadle support plates Connecting the cords Installation underneath the work tableInstalling the V-belt Installing the belt cover plate Adjusting the belt retainerAdjusting the finger protector Adjusting the treadle stroke Installing the treadleAdjusting the treadle pressure Adjusting the treadle return pressureInstalling the spool stand Installing the eye guard Lubricating the bed base LubricationRotary hook lubrication adjustment Lubricating the armLubricating the rotary hook Installing the belt cover Part names and functions OperationSelect key Test feed mode indicatorManual mode indicator Program mode indicatorBefore starting home position return Home position return preparationOperating the treadle Operating the standing pedal option Two pedals + kick pedalThree pedals Program setting method Program initialization conditionParameter table Setting items Setting range Unit Default Zigzag width 3.0 mm Setting items Setting range Unit Default Front tack pitch except radial 05 1.00 mm Setting items Setting range Unit No. of stitches in X direction for saw-shaped rear Start backtack width 3.0 mm Saw-shaped underlays Saw-shaped underlay bar tack X stitch no Stitches Rear bar tack tension release timing Stitches Changing program details Bar tacking stitches being cut by the knife 13 17 2118Q 2123Q Saw-shape Rear tack vector shape programsTriangle RectangleRectangle underlay Underlay programsUnderlays sewn together Saw-shape underlayCenter knife standard Rear knife Cutter operationCycle program Changing the production counter Changing the lower thread counter setting value Adding patterns to a P-ROM Using the program memosAdding patterns created using the BAS-PC/300 Program memo contents→ 1 → 2 → 3 →….. → 90→ P1 → P2 → …… → P9 → 1 → 2 → …… Checking the Sewing Pattern 2136Q Correct USE Installing the needleThreading the thread at the sewing start position Threading the upper threadWinding the lower thread Adjusting the bobbin winding amountPurl stitch seal stitch Threading the bobbin caseStitch patterns Whip stitch plain stitchThread tension Thread take-up spring tension Thread take-up spring heightReference thread tension Sewing SewingTo finish sewing in this condition If the emergency stop switch is pressed during sewingEmergency stop If the thread breaks during sewingTo continue sewing from around the location of the breakage Thread breakage before sewing is finishedLower thread counter When resuming sewing in test feed mode or manual modeCleaning MaintenanceCleaning the control box air inlet port Cleaning the eye guardDraining the oil Checking the needle Cleaning the length feed plateNeedle bar height Standard AdjustmentsAdjusting the clearance between needle and hook point Needle and hook timing adjustmentAdjusting the knife installation Adjusting the work clamp pressureAdjusting the upper thread trimming Adjusting the upper thread scissors opening timing Gradual opening timing adjustmentScissors fully opening timing adjustment Adjusting the lower thread clamp timing Adjusting the bobbin presserAdjusting the needle up stop position Changing Functions Using the Memory Switches Memory switch table Initializing a single program Settings which are initializedProgram Initialization Initializing all programsPanel DIP switches Changing Functions Using the DIP SwitchesDipswa Panel DIP switch tableControl circuit board DIP switches DIP switch inside the control box table Needle plate Gauge Parts ListFor flat cutter Work clamp assy, W/F-G Finger guard Gauge Parts List Cutter Error Code Table Like to keep the program which exceeds the area Troubleshooting TroubleshootingCause Needle is incorrectly installed 15-1, Naeshiro-cho, Mizuho-ku, Nagoya 467-8561, Japan. Phone

LH4-B800E, HE-8000, HE-8000 I specifications

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