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Unicorn LS2-H540 - User Manual

Unicorn LS2-H540
39 pages
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사 용 설 명 서
PART BOOK
부 품 명 세 서
L S2-H540
/
LS2-H5400
SINGLE NEEDLE HIGH-SPEE D LONG ARM UPPER & LOWER
FEE D LOCKSTITCH SEWIMG MACHINE / WITH THREAD TR IMMER
1 본침 상하송 재봉 기 / 자동 사절 재봉기
OPERATION MANUAL

Table of Contents

Questions and Answers

  • B
    Brian CantuJul 31, 2025
    Why is the thread breaking on my Unicorn Sewing Machine?
    • S
      Sarah MccannJul 31, 2025
      If the thread is breaking on your Unicorn Sewing Machine, it could be due to several reasons. First, try rethreading the machine. Other possible causes include a bent or blunt needle (replace the needle), improper needle installation (reinstall the needle), excessive needle thread tension (adjust the needle thread tension), excessive bobbin thread tension (adjust the bobbin thread tension), loose needle thread (adjust the thread take-up spring), or insufficient rotary hook lubrication (adjust the oil supply).
  • P
    Paul MedinaAug 15, 2025
    What to do if the needle keeps breaking on my Unicorn Sewing Machine?
    • J
      Jose NewmanAug 15, 2025
      Needle breakage in your Unicorn Sewing Machine can occur due to several reasons. Ensure the needle is correctly installed by reinstalling it. Other potential causes include a bent or blunt needle (replace the needle), improper needle to rotary hook timing (adjust the rotary hook timing), incorrect needle bar height (adjust the rotary hook timing), improper needle to rotary hook gap (adjust the rotary hook timing), or a thread wiper positioned too high (adjust the thread wiper position with the screw).

Summary

Safety Instructions

Safety Indications and Their Meanings

Explains safety symbols and indications for safe operation.

Safety Precautions

Installation and Operation Safety

Cleaning and Maintenance Safety

Safety instructions for cleaning and routine maintenance of the machine.

Preparation Before Starting Operation

Lubrication

Lubrication Procedure

How to Use the Machine

Needle Attachment and Threading

Step-by-step guide for attaching the needle and winding lower thread.

Thread Routing and Handling

Instructions for routing upper and lower threads and handling them during operation.

Bobbin Case Removal and Stitch Adjustments

Procedures for removing the bobbin case and adjusting stitch length and reverse sewing.

Thread Tension and Spring Adjustments

Presser Foot Pressure Adjustment

Thread Tension and Switch Adjustments

Adjusting Thread Tension Release

Synchronizer Adjustment

Unicorn LS2-H540 Specifications

General IconGeneral
Stitches540
Buttonhole Styles13
LCD ScreenYes
TypeElectronic
Stitch TypeDecorative
Needle ThreaderYes
Speed850 spm
Weight7.5 kg

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