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Baby Lock BL-6800 User Manual

Baby Lock BL-6800
76 pages
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6. 2001.

Table of Contents

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Baby Lock BL-6800 Specifications

General IconGeneral
Automatic Needle ThreaderYes
Foot ControlIncluded
Embroidery DesignsNo
LCD ScreenNo
USB PortNo

Summary

I. PRINCIPAL MECHANISMS

Mechanical Chart Overview

Illustrates the main mechanical components and their layout within the sewing machine.

Power Transmission Diagrams

Shows how power is transmitted through various shafts and components for machine movement.

Electronic Components Arrangement

Identifies the location of electronic parts like PC boards, sensors, and switches.

Control System Block Diagram

Visualizes the interconnections and flow of signals within the machine's control system.

Motor Unit Control and Functions

Explains the control mechanisms for the main motor and other electronic components.

II. DISASSEMBLING AND REASSEMBLING THE SEWING MACHINE

Outer Parts and Main Parts Disassembly

Step-by-step guide to remove external and major internal components of the sewing machine.

Internal Lead Wires Arrangement

Illustrates the routing and connection of internal wiring harnesses for proper assembly.

Main PC Board Removal Procedure

Details the procedure for safely removing the main printed circuit board assembly.

III. MECHANICAL ADJUSTMENT STANDARDS AND ADJUSTMENT PROCEDURES

Selecting Unit and Pattern Adjustments

Adjustments for stitch selection, pattern display, and related unit functions.

Shaft and Belt Timing Adjustments

Procedures for aligning the timing of upper/lower shafts and belt tensions.

Feed Dog Height and Position Adjustment

Adjusts the feed dog's height and its front-rear/left-right position for optimal fabric feeding.

Thread Tension Dial Calibration

Sets the correct thread tension using the dial and a tension gauge.

IV. TROUBLESHOOTING PROCEDURES

Stitching and Feeding Problems

Addresses issues like skipped stitches, fabric not feeding, or feeding unevenly.

Thread Breakage Issues

Covers problems with upper and lower thread breaking during operation.

Mechanical and Noise Issues

Addresses needle breaks, unusual noise, and fabric gathering problems.

Pattern and Operational Errors

Problems with pattern display, stitch errors, and motor/light failures.

V. HOW TO ADJUST ELECTRONIC ELEMENTS (BL6800 Only)

Power and Lamp Troubleshooting

Troubleshooting steps when the lamp does not light up after power activation.

Main Motor Operation Troubleshooting

Addresses motor not operating, unstable speed, and starting/stopping issues.

Speed and Needle Positioning Adjustments

Covers issues related to speed control and the needle's stopping position.

Control Switch and Foot Controller Issues

Troubleshooting for reverse switch, foot controller, and buzzer malfunctions.

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