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LONGER LK4 User Manual

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LONGER LK4 Specifications

General IconGeneral
Build Volume220 x 220 x 250 mm
Layer Resolution0.1 - 0.4 mm
Nozzle Diameter0.4 mm
Filament Diameter1.75 mm
ConnectivityUSB, SD card
Bed LevelingManual
Print TechnologyFDM (Fused Deposition Modeling)
Heated BedYes
Bed TemperatureUp to 100°C
Nozzle TemperatureUp to 250°C
Machine Weight7.8 kg
Printing Speed80 mm/s
Supported MaterialsPLA, ABS, TPU
Frame MaterialAluminum
Power Supply24V, 360W

Summary

Safety Precautions

Hot Nozzle and Pinching Hazards

Safety warning regarding hot nozzle parts and avoiding direct contact during operation.

Electrical Safety and Voltage

Electrical safety guidelines including voltage compatibility, grounding, and avoiding incorrect power sources.

Continuous Operation Limits

Recommendation to stop the machine for 1-3 hours after continuous operation exceeding 96 hours.

Consumable Storage

Consumable Handling and Environment

Filament Handling and Recommendations

Advice on securing the filament end and recommendation to use company-provided consumables.

Environmental Operating Conditions

Specifies optimal temperature (10°C~30°C) and humidity (20%~50%) for printer operation.

Product Information

Model Parameters

Detailed specifications of the LK2 3D printer including dimensions, technology, materials, and software compatibility.

Machine Introduction

Key Component Identification

Diagram illustrating major components of the 3D printer like Rack, Gantry, Extruder, and Hot bed.

Nozzle Module Exploded View

Detailed breakdown of the nozzle assembly components, including fan, heat sink, and thermistor.

Machine Assembly Overview

Packaging Components

Visuals of the upper and lower packaging components of the 3D printer.

Assembled Printer View

Image showing the fully assembled LK2 3D printer.

Machine Assembly: Gantry Installation

Gantry Installation Steps

Visual guide for installing the gantry, highlighting screw types and alignment of blue boxes.

Machine Assembly: X-Axis Installation

X-Axis Component Mounting

Instructions for installing the X-axis components, including screw types and adjusting eccentric nuts.

Machine Assembly: X-Axis Details

X-Axis Assembly Progression

Visual steps continuing the X-axis installation process, showing component alignment and attachment.

Machine Assembly: Belt Tensioning

X-Axis Belt Tension Adjustment

Instructions on adjusting the belt tension on the X-axis using screws on the box.

Machine Assembly: Beam and Screw Mounting

X-Axis Beam Installation

Guidance on mounting the X-axis beam and adjusting wheels with eccentric nuts for proper fit.

Gantry Upper Beam and Screw Mounting

Steps for installing the gantry upper beam and mounting screws using specified sizes.

Machine Assembly: Teflon Tube & Lead Screw

Teflon Tube Installation

Steps for installing the Teflon tube, noting its direction and ensuring proper alignment.

Lead Screw Alignment

Procedure for aligning the lead screw with the motor shaft and adjusting coupling tightness.

Machine Assembly: Z-Axis & Substrate

Z-Axis Limit Switch Installation

Guide for installing the Z-axis limit switch, noting its adjustable position from the base.

Aluminum Substrate Mounting

Steps for mounting the aluminum substrate, showing springs and assembly detail.

Machine Assembly: Wiring

Component Wiring Connections

Numbered diagram showing connections for X motor, X limit switch, E axis motor, E axis break detection, Z axis motor, and Z axis limit switch.

Screen Connection Procedure

Visual steps for connecting the screen's ribbon cables to the mainboard.

Machine Assembly: Screen Wiring Details

Screen Cable Routing and Securing

Visual guide for routing screen cables and using cable ties appropriately.

Machine Assembly: Final Steps

Rack and Glass Mounting

Steps for mounting the rack and glass onto the printer assembly.

Assembly Completion Confirmation

Image showing the fully assembled LK2 3D printer, confirming completion of assembly steps.

Power Regulation

Voltage Adjustment

Instructions on how to adjust the power supply to match the input voltage (110V or 220V) to prevent damage.

Leveling Method

Manual Bed Leveling

Detailed steps for manually leveling the print bed using the nozzle and leveling nuts, aiming for A4 paper thickness.

Leveling Interface Controls

Description of the leveling interface buttons (Top Left, Top Right, etc.) and their functions.

Machine Operation: Control Interface

Control Panel Functions

Overview of the machine's control panel functions, including moving heads, files, extrusion, and leveling.

Machine Operation: Main Interface

Main Interface Navigation

Explanation of the main interface icons (HOME, Move Head, Files, Extrude, Leveling, Recovery, More) and their functions.

Interface Functionality Details

Description of what each interface section controls, such as movement, temperature, and material flow.

Software Setup: Cura Installation

Cura Installation Wizard

Screenshots and steps for installing the Cura slicing software, including driver installation.

Software Setup: Machine Configuration

Initial Cura Setup Wizard

Guide through the initial Cura setup wizard for selecting language and machine type.

Custom RepRap Settings

Instructions for manually configuring RepRap machine settings like dimensions and nozzle size in Cura.

Software Setup: Slicing Parameters

Cura Software Interface Overview

Overview of the Cura interface, showing file loading and basic settings like filament diameter and flow.

Cura: Offline Printing Guide

Slicing Software Settings

Details on Cura settings for slicing, including nozzle size, retraction, speed, and quality parameters.

Model Manipulation in Cura

Explanation of how to manipulate the 3D model in Cura, including rotation, scaling, and mirroring.

Cura: Model Manipulation Details

Model Transformation Tools

Visual guide on using Cura's tools for rotating, scaling, and mirroring 3D models.

Cura: Saving and Printing

Saving G-Code to SD Card

Instructions on saving the sliced file as G-code to an SD card for printing.

Print View Mode Selection

Explanation of different print view modes in Cura (Normal, Overhang, Transparent, X-Ray, Layers).

Cura: Software Parameter Settings

Quality and Speed Settings

Detailed explanation of quality parameters like layer height, shell thickness, fill density, and print speed in Cura.

Support and Filament Settings

Guide to setting up support structures, platform adhesion, filament diameter, and flow rate in Cura.

Cura: Parameter Explanations

Layer Thickness and Shell Settings

Detailed explanations of layer thickness, shell thickness, retraction, and bottom/top thickness settings.

Fill Density and Print Speed

Explanations of fill density, print speed, printing temperature, and support type settings.

Cura: Advanced Parameter Details

Retraction and Speed Parameters

Detailed explanations of retraction speed, distance, travel speed, and bottom layer speed settings.

Quality and Cooling Settings

Explanations of initial layer thickness, line width, and cooling fan settings in Cura.

Online Printing: USB Connection

USB Driver Installation

Steps for installing the CH340G USB driver for connecting the printer to the computer.

Online Printing: Preferences & Connection

Setting Cura Preferences

Guide to configuring Cura preferences, selecting the printer model, and setting communication parameters like serial port.

Establishing Printer Connection

Instructions on connecting the printer via USB and verifying the connection status.

Online Printing: Starting Print

Initiating Print Process

Steps to start printing after loading a file, including using the print window and controlling axis movements.

G-Code Control Box Usage

Explanation of the G-code control box for advanced users, with a warning against incorrect usage.

Printing Recovery and Monitoring

Power Outage Recovery Procedure

Procedure to resume printing after a power interruption by using the 'Recovery' option.

Filament Run-out Detection

How the printer detects and alerts when filament runs out, and the process to resume printing.

Printing Recovery: Filament Issues

Filament Run-out Recovery

Steps to resolve filament run-out by refilling filament and clicking the Recovery button.

Power Shutdown Print Resume

Guidance on resuming prints after a power failure, noting print data saving conditions.

Frequently Asked Questions (FAQ)

Firmware Update Process

Steps to update the printer's firmware by copying files to an SD card and restarting the machine.

Filament Discharge Troubleshooting

Troubleshooting steps for when the filament does not discharge from the nozzle, including checking the feeding mechanism and using a cleaning needle.

FAQ: Filament and Printing Problems

Filament Stuck in Pneumatic Joint

Troubleshooting steps for filament getting stuck in the pneumatic joint during retraction.

Resume Print After Power Loss

Guidance on resuming prints after a power failure, noting print data saving conditions.

FAQ: Leveling and Mechanical Issues

Nozzle Leveling Adjustment

Troubleshooting steps for uneven nozzle-to-bed distance during leveling, suggesting checking X-axis beam tightness.

FAQ: First Layer Adhesion

First Layer Curling Solutions

Solutions for curling or poor adhesion of the first layer, recommending re-leveling and using raft settings.

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