Motorola LH4-B800E, HE-8000 I instruction manual Standard Adjustments, Needle bar height

Page 78

10.STANDARD ADJUSTMENTS

10.STANDARD ADJUSTMENTS

CAUTION

Maintenance and inspection of the sewing machine should only be carried out by a qualified technician.

Ask your Brother dealer or a qualified elec- trician to carry out any maintenance and inspection of the electrical system.

Turn off the power switch and disconnect the power cord from the wall outlet at the following times, otherwise the machine may operate if the treadle is depressed by mistake, which could result in injury.

・When carrying out inspection, adjustment and maintenance

・When replacing consumable parts such as the rotary hook

Use both hands to hold the machine head when tilting it back or returning it to its original position. If only one hand is used, the weight of the machine head may cause your hand to slip, and your hand may get caught.

If the power switch needs to be left on when carrying out some adjustment, be extremely careful to observe all safety precautions.

If any safety devices have been removed, be absolutely sure to re-install them to their original positions and check that they operate correctly before using the machine.

NOTE:

•The pulse motor may become warm. Be careful not to touch it when tilting back the machine head.

•The feed pulse motor cooling fan spins while the machine power supply is turned on. Be careful of this when tilting back the machine head.

•Take care when handling the knife.

Turn off the power supply before carrying out all but the following tasks. “10-1. Needle bar height”

“10-2. Needle and hook timing adjustment”

“10-3. Adjusting the clearance between needle and hook point” “10-7-2. Adjusting the upper thread scissors opening timing” “10-9. Adjusting the bobbin presser”

Turn on the power, and after the sewing machine returns to the home position, press the RESET key before carrying out the above adjustments.

*The work clamp will drop and "AdJ" will appear in the numeric display. The sewing machine will not operate when the treadle is pressed at this time.

10-1. Needle bar height

(2)(3)

(4)

(1)

(5)

2165Q

After the sewing machine has returned to the home position, press the RESET key before carrying out this adjustment.

1.Set the needle bar (1) to its lowest position.

2.Remove the rubber cap (2) from the face plate, and then loosen the screw (3) of the needle bar clamp.

3.Insert the “1” part of the gauge (4) between the needle plate (5) and the lower edge of the needle bar (1), and touch the needle bar against the gauge.

4.Tighten the screw (3).

5.Install the rubber cap (2).

*Different gauges are used for each of the three sub-classes -2, -3 and -5, so make sure that the gauge being used matches the specifications and application for the sewing machine being adjusted.

HE-8000

71

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Page 77 Page 79
Contents
LH4-B800E HE-8000 Safety Instructions Environmental requirements Sewing Moving parts may cause injury Contents Changing Functions Using Safety devices Name of Each PartSpecifications SubclassHE-8000 Standard sewing pattern list Leg parts Optional PartsSpecial needle plate Standing operation pedalTape guard RulerAuxiliary table Replacement parts set for 70 mm buttonhole length ProgrammerInstallation Power tableVertical positioning Installing the motor Installing the flange nutInstalling the control box Installing the power switch Installing the bed baseInstalling the machine head Installing the head restInstalling the operation panel Connecting the cords Connecting the ground wireConnecting the machine head harness Connecting the motor harness Connect the connectors of the feed motor harnessConnecting the power cord Connecting the standing pedal harness option Installing the transformer Floor installationTable leg installation treadle support plates Installation underneath the work table Connecting the cordsInstalling the V-belt Installing the belt cover plate Adjusting the belt retainerAdjusting the finger protector Adjusting the treadle return pressure Installing the treadleAdjusting the treadle pressure Adjusting the treadle strokeInstalling the spool stand Installing the eye guard Lubrication Lubricating the bed baseRotary hook lubrication adjustment Lubricating the armLubricating the rotary hook Installing the belt cover Operation Part names and functionsProgram mode indicator Test feed mode indicatorManual mode indicator Select keyHome position return preparation Before starting home position returnOperating 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 Rectangle Rear tack vector shape programsTriangle Saw-shapeSaw-shape underlay Underlay programsUnderlays sewn together Rectangle underlayCutter operation Center knife standard Rear knifeCycle program Changing the production counter Changing the lower thread counter setting value Program memo contents Using the program memosAdding patterns created using the BAS-PC/300 Adding patterns to a P-ROM→ 1 → 2 → 3 →….. → 90→ P1 → P2 → …… → P9 → 1 → 2 → …… Checking the Sewing Pattern 2136Q Installing the needle Correct USEThreading the upper thread Threading the thread at the sewing start positionAdjusting the bobbin winding amount Winding the lower threadWhip stitch plain stitch Threading the bobbin caseStitch patterns Purl stitch seal stitchThread tension Thread take-up spring tension Thread take-up spring heightReference thread tension Sewing SewingIf the emergency stop switch is pressed during sewing To finish sewing in this conditionIf the thread breaks during sewing Emergency stopThread breakage before sewing is finished To continue sewing from around the location of the breakage When resuming sewing in test feed mode or manual mode Lower thread counterMaintenance CleaningCleaning the control box air inlet port Cleaning the eye guardDraining the oil Cleaning the length feed plate Checking the needleStandard Adjustments Needle bar heightNeedle and hook timing adjustment Adjusting the clearance between needle and hook pointAdjusting the work clamp pressure Adjusting the knife installationAdjusting 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 all programs Settings which are initializedProgram Initialization Initializing a single programChanging Functions Using the DIP Switches Panel DIP switchesPanel DIP switch table DipswaControl circuit board DIP switches DIP switch inside the control box table Gauge Parts List Needle plateFor 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
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