Motorola HE-8000 I, LH4-B800E instruction manual Adjusting the upper thread scissors opening timing

Page 82

10.STANDARD ADJUSTMENTS

10-7-2. Adjusting the upper thread scissors opening timing

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

2180Q		2182Q
Start touching at 1.5 – 2.5 mm	(C)
	(C)
(2) (D)	(b)	0.5 mm
	0.5 mm	0.5 mm
		(b)

	(B)		(B)
(1)	(B)	(3)
(1)	0.5 mm	(3)
	(c)			Approx. 2 mm
			(5)	Approx. 2 mm
	(4)		(5)	(9)	(7)
	(4)	(8)
		(8)

(1)

(6) Approx.

1.0 – 1.5 mm

		(4)
(2)	0.5 mm	(C)
	(c)
2181Q		2183Q

<Gradual opening timing adjustment>

1.Loosen the screws (1), and then adjust so that the distance (b) between ridge line (B) on the opening cam (2) and the upper thread scissors (3) is 0.5 mm, and so that ridge line (B) on the opening cam is parallel to the feed direction.

2.Loosen the screw (4), and then adjust so that the distance (c) between the rising section (C) of the upper thread scissors (3) and the tip of the opening cam (2) is approximately 0.5 mm when the upper thread scissors (3) are closed.

If you would like the scissors to start opening earlier, make the distance smaller. However, if the distance is too small, check that the work clamp does not touch the rising section (C) of the upper thread scissors

(3) of the opening cam (2) when it is lowered and prevent the upper scissors (3) from opening.

*Apply grease to the inclined face (D) of the opening cam (2).

<Scissors fully opening timing adjustment>

1.Loosen the screw (5), and then adjust the support plate (8) so that the back plate (6) and the cam (7) overlap by approximately 1.0 – 1.5 mm.

*If the amount of overlap is too small, the upper thread scissors will not open properly and the upper thread scissors and the cutter may touch each other.

2.Loosen the screw (9), and then adjust the clearance between the bend in the back plate (6) and the cam

(7) to approximately 2 mm. If you would like the scissors to start opening earlier, make this clearance smaller.

3.Check that the upper thread scissors (3) open smoothly during feeding.

NOTE:

If the upper thread scissors (3) do not open smoothly, the upper thread scissors (3) may touch the cutter and needle breakage may occur.

HE-8000

75

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Contents

LH4-B800E HE-8000 Safety Instructions Environmental requirements Sewing Moving parts may cause injury Contents Changing Functions Using Safety devices Name of Each PartSubclass SpecificationsHE-8000 Standard sewing pattern list Leg parts Optional PartsSpecial needle plate Standing operation pedalRuler Tape guardAuxiliary 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 ground wire Connecting the cordsConnecting 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 Floor installation Installing the transformerTable leg installation treadle support plates Installation underneath the work table Connecting the cordsInstalling the V-belt Adjusting the belt retainer Installing the belt cover plateAdjusting 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 baseLubricating the arm Rotary hook lubrication adjustmentLubricating 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 Two pedals + kick pedal Operating the standing pedal optionThree pedals Program initialization condition Program setting methodParameter 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 height Thread take-up spring tensionReference 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 breakageWhen resuming sewing in test feed mode or manual mode Lower thread counterMaintenance CleaningCleaning the eye guard Cleaning the control box air inlet portDraining the oil Cleaning the length feed plate Checking the needle Standard 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 Gradual opening timing adjustment Adjusting the upper thread scissors opening timingScissors fully opening timing adjustment Adjusting the bobbin presser Adjusting the lower thread clamp timingAdjusting 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