DURKOPP ADLER 768 Operating Manual
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DURKOPP ADLER 768 Operating Manual

DURKOPP ADLER 768 Operating Manual

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Contents
Preface and general safety instructions
Part 1: Operating Manual, Class 768
1.
Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.
Designated use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.
Subclasses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.
5.
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1
Threading the needle thread . . . . . . . . . . . . . . . . . . . . . . . .
6.2
6.3
Opening the needle-thread tensioners . . . . . . . . . . . . . . . . . .
6.4
Adjusting the thread regulator . . . . . . . . . . . . . . . . . . . . . . .
6.5
Winding on the looper thread . . . . . . . . . . . . . . . . . . . . . . .
6.6
Fitting the looper-thread bobbin . . . . . . . . . . . . . . . . . . . . . .
6.7
Adjusting the looper-thread tension . . . . . . . . . . . . . . . . . . . .
6.8
Fitting and changing the needle . . . . . . . . . . . . . . . . . . . . . .
6.9
6.10
Locking the sewing feet in the up position . . . . . . . . . . . . . . . .
6.11
6.12
Adjusting the sewing-foot pressure . . . . . . . . . . . . . . . . . . . .
6.13
Adjusting the stitch length . . . . . . . . . . . . . . . . . . . . . . . . .
7.
Keypad on sewing-machine arm . . . . . . . . . . . . . . . . . . . .
7.1
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2
LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ausg./Edition: 07/99
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Summary of Contents for DURKOPP ADLER 768

  • Page 1: Table Of Contents

    Contents page: Preface and general safety instructions Part 1: Operating Manual, Class 768 Product description ......Designated use .
  • Page 2 Contents page: Control and operating panel ..... . General ........Operating-panel keys .

  • Page 3: Product Description

    Product description The DÜRKOPP ADLER 768 is a special sewing machine with universal applications. Two-needle double-lockstitch pillar sewing machine with underfeed, needle feed and alternating-foot overfeed Robust design based on the proven modular system of the class 767. Low-maintenance design (maintenance-free antifriction and sintering bearings, articulated thread lever with permanently-lubricated roller bearings) Automatic non-pressurised recirculating lubrication with sight glasses for oil level and circulation.

  • Page 4: Subclasses

    Subclasses Class 768-274-FLP-HP: Two-needle double-lockstitch pillar sewing machine with underfeed, needle feed and alternating-foot overfeed Ancillary equipment order no. ancillary equipment 9822 510125 light-guide sewing lamp with mains cable and rocker switch, for fitting to the sewing-machine arm 9880 767001 sewing-lamp fitting set for light-guide sewing lamp 9822 510125 9822 510001...
  • Page 5 needle system: 134-35 needle thickness (depending on E No.): - min. [Nm] - max. [Nm] - standard [Nm] needle gap (depending on E No.): - min. [mm] - max. [mm] max. sewing-thread thicknesses: - cotton [NeB] 10/3 - synthetic thread [Nm] 10/3 - covering yarn...
  • Page 6 Fig. a: correct thread loop in the centre of the material Fig. b: needle-thread tension too low or looper-thread tension too great Fig. c: needle-thread tension too great or looper-thread tension too low...

  • Page 7: Operation

    Operation Threading the needle thread Caution - danger of injury ! Turn off the main switch! The needle thread may only be threaded with the sewing machine switched off. – Thread the needle thread as shown in the illustration. Adjusting the needle-thread tension Pre-tensioners 1 The pre-tensioners 1 should be set at a lower tension than the main tensioners 3.

  • Page 8: Adjusting The Thread Regulator

    Adjusting the thread regulator The thread regulator 1 regulates the amount of needle thread necessary for stitch formation. The setting depends on the following factors: - material thickness - yarn characteristics - stitch length A properly-adjusted thread regulator ensures an ideal sewing result at a minimum needle-thread tension.

  • Page 9: Winding On The Looper Thread

    Winding on the looper thread Caution - danger of injury ! Turn off the main switch. The looper thread may be threaded for spooling only with the sewing machine switched off. The looper thread may be spooled only with the sewing feet locked in the raised position.

  • Page 10: Fitting The Looper-Thread Bobbin

    Fitting the looper-thread bobbin Caution - danger of injury! Turn off the main switch. The looper-thread bobbin may only be changed with the se- wing machine switched off. Removing the empty looper-thread bobbin – Raise the sewing foot. – Open shuttle cover 3. –...

  • Page 11: Adjusting The Looper-Thread Tension

    Adjusting the looper-thread tension Caution - danger of injury! Turn off the main switch. The looper-thread tension may only be adjusted with the se- wing machine switched off. Adjusting the tensioning spring 2 – Open the shuttle cover. – Adjust the tensioning spring 2 with regulating screw 3. to increase looper-thread tension = turn screw 3 clockwise to decrease looper-thread tension =...

  • Page 12: Fitting And Changing The Needle

    Fitting and changing the needle Caution - danger of injury! Turn off the main switch. Needles may only be changed with the sewing machine switched off. – Turn the handwheel until the needle rod 1 has reached its highest point. –...

  • Page 13: Raising The Sewing Feet

    Raising the sewing feet The class 768 pillar sewing machine is fitted with the electro-pneumatic sewing-foot lift (FLP) as standard. This enables the sewing feet to be raised during sewing. – Push pedal half-way back. – The sewing machine halts in the 1st position (needles down). Raising the sewing feet.

  • Page 14: Adjusting The Sewing-Foot Stroke

    6.11 Adjusting the sewing-foot stroke 6.11.1 Adjusting the sewing-foot stroke mechanically The height of the sewing-foot stroke is adjusted with adjusting wheel 1 on the arm cover. Caution - danger of injury The sewing-foot stroke may only be adjusted with the sewing machine switched off.

  • Page 15: Rapid Electro-Pneumatic Stroke Adjustment (Hp)

    6.11.2 Rapid electro-pneumatic stroke adjustment (HP) The class 768 pillar sewing machine is fitted with rapid electro-pneumatic stroke adjustment (HP) as standard. Maximum sewing-foot stroke can be activated while sewing for additional thicknesses in the material or to oversew cross-seams as follows: –...

  • Page 16: Adjusting The Sewing-Foot Pressure

    6.12 Adjusting the sewing-foot pressure The sewing-foot pressure is adjusted with knob 1. – to increase sewing-foot pressure = turn knob 1 clockwise to decrease sewing-foot pressure = turn knob 1 anti-clockwise 6.13 Adjusting the stitch length The stitch length is adjusted with knob 2. –...

  • Page 17: Keypad On Sewing-Machine Arm

    Keypad on the sewing-machine arm Keys function position needle in up or down position (stitch by stitch) activate maximum sewing-foot stroke switch additional thread tension on/off switch seam-centre guide stop on/off display maximum sewing-foot stroke activated sewing drive switched on additional thread tension switched on switch seam-centre guide stop switched on...

  • Page 18: Control And Operating Panel

    Control and operating panel CAUTION! This manual covers only those key functions and parame- ter changes available to the operator. For a more detailed description of the control system plea- se consult the motor-manufacturer’s current operating ma- nual (supplied). General The operating panel is used to program the control unit and to set seam functions.

  • Page 19: Operating-Panel Keys

    Operating-panel keys function settings start or end programming mode confirm a parameter-value change increase a displayed parameter value decrease a displayed parameter value starting bar tack or starting-stitch compression SINGLE / DOUBLE / OFF ending bar tack or ending-stitch compression SINGLE / DOUBLE / OFF auto foot lift on stop in mid-seam ON / OFF...

  • Page 20: Operating The V810 Control Unit

    Symbol function automatic rotation speed active light barrier switched on machine running limited rotation speed active Operating the V810 control unit Functions can be switched on and off by pressing the number keys and certain and symbol keys on the control panel. key 3: auto foot lift auto foot lift on stop in mid-seam on: right arrow over key 3 on.

  • Page 21: Changing Parameter Values

    Changing parameter values CAUTION! After changing parameters it is essential to carry out a se- wing run. Only then is the altered setting properly saved. If sewing does not take place, the new setting is lost when the main switch is turned off. Parameters are changed and switched on and off with the "P", "E", "+"...

  • Page 22: Sewing

    Sewing The description of the sewing process is based on the following assumption: – The machine in question is a special sewing machine of sub-class 768-274-FLP-HP. – The following functions are set on the operating panel: stitch counting: basic needle position: DOWN (position 1) auto sewing-foot lift on stop in mid-seam: starting bar-tack:...
  • Page 23 Sewing intermediate bar-tacks - Press stitch-regulating lever 1 downwards. The machine sews backwards for as long as the stitch-regulating lever is held down. Speed is determined by the pedal. - Press key 2 or operate the knee-switch. Oversewing a cross-seam. Maximum sewing-foot stroke is activated.

  • Page 24: Maintenance

    Maintenance Caution - danger of injury! Turn off the main switch! Maintenance may only be carried out with the sewing machine switched off. Maintenance work must be carried out no less frequently than at the intervals given in the tables (see "operating hours" column). Maintenance intervals may need to be shorter when processing heavy-shedding materials.
  • Page 25 maintenance work explanation operating to be carried out hours Upper part of machine - Remove lint, pieces of Places in special need of cleaning: thread and other debris. - area under the needle plate - feeders - area around the shuttle 2 - upper part of bobbin housing 3 - inner surface of shuttle cover - needle-thread tensioners...

  • Page 27: Lubrication

    10.2 Lubrication Caution - danger of injury! Oil can cause skin eruptions. Avoid protracted contact with the skin. In the event of contact, thoroughly wash the affected area. CAUTION! The handling and disposal of mineral oils is subject to legal regulation.

  • Page 28: Ancillary Equipment

    Ancillary equipment 11.1 Seam-centre guide (only if 768-E2/... is present) General The seam-centre guide provides guidance when backstitching. The function of the guide piece is to ensure that there is an equal distance between the centre of the seam and the left and right-hand needles. Bearing pressure of seam-centre guide stop CAUTION! The seam-centre guide pressure must not exceed a maxi-...

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