LONGER LK4 Pro User manual

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Catalog
A. Product information........................................................................................................................3
(1) Model parameter...................................................................................................................3
(2) Machine introduction............................................................................................................ 4
(3) Nozzle module exploded view...............................................................................................4
(4) Machine assembly................................................................................................................. 5
1. Gantry installation...........................................................................................................5
2. X-axis installation.............................................................................................................6
3. Mounting the x-axis beam.............................................................................................. 9
4. Install the gantry upper beam.........................................................................................9
5. Mounting screw...............................................................................................................9
6.Install Teflon tube...........................................................................................................10
7.Install the z-axis limit switch.......................................................................................... 11
8.Mounting aluminum substrate...................................................................................... 11
9.Wiring............................................................................................................................. 12
10. Screen wiring...............................................................................................................12
11.Mounting rack.............................................................................................................. 13
12 .Assembly completed...................................................................................................13
（5）Power regulation...........................................................................................................14
（6）leveling method...............................................................................................................15
B．Machine operation....................................................................................................................16
（1）Machine control interface description........................................................................... 16
（2）Home interface................................................................................................................18
（3）Move interface................................................................................................................ 19
（4）Tune interface..................................................................................................................20
（5）Utilities interface.............................................................................................................22
（6）Print interface..................................................................................................................25
C．Cura installation and operation software................................................................................. 26
（1）Slice software offline printing instructions.....................................................................29
（2）Software parameter setting............................................................................................ 32
D．Operation for online printing....................................................................................................35
E．Resume printing and filament run-out detection function......................................................38
（1）Power failure................................................................................................................... 38
（2）Broken material detection.............................................................................................. 39
F．FAQ manual............................................................................................................................... 40
Question1: How to update the firmware?...........................................................................40
Question 2:What if the filament does not discharge from the machine?.................... 41
Question 3:.............................................................................................................................. 42
Question 4: What should I do if I cannot resume printing after power shutdown?..... 43
Question 5:.............................................................................................................................. 43
Question 6:............................................................................................................................... 44

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Safety Precautions
1) The temperature of the nozzle parts can reach 250 °C during the
operation of the machine. To ensure your safety, it is forbidden to touch
the model and nozzle directly with your hand while the printer is
printing or cooling.
2) During the operation of the machine, it is forbidden to reach into the
machine to prevent pinching.
3) The working voltage is 110~220V AC voltage 50HZ AC. The three-pin
socket must be grounded. Do not use other power sources to avoid
damage to components or fire, electric shock and other accidents.
Note: Before powering on, please check whether the input voltage value
of the switching power supply meets the voltage standard of the country
or region.
4) When the machine is working continuously for ≥ 96 hours, it should
be stopped for 1-3 hours.
Consumables
The consumables are not used after unpacking or for a long period of
time after the print model is completed. The consumables should be
taken out of the printer and sealed to prevent the consumables from
being exposed to the air for a long time, causing moisture and affecting
the print quality. At the same time, when the consumables are removed

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The front end of the consumable should be fixed on the tray to avoid
consumables and affect the next print.
To use this printer, it is recommended to use the supplies provided by
the company. At present, the quality of consumables sold in the retail
market is uneven, and printing is prone to breakage.
Staggering and clogging the printer nozzle, etc., and irreversible damage
to the heating components of the nozzle, the extrusion motor and the
extrusion gear. The company will not guarantee the printer due to the
use of consumables other than our company.
Environmental requirements
Temperature requirement: 10°C~30°C, humidity requirement: 20%~50%,
this 3D printer can work normally within this range; beyond this range,
this 3D printer will unable to achieve the best print results.

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A.Product information
(1) Model parameter
model
LK4 Pro
Machine size
402*382*655 MM
frame
Classic aluminum
frame
Machine weight
7.8KG
Molding
FDM (hot melt
production)
Package
dimensions
467*412*187 MM
Number of nozzles
1
Consumable color
Multi-color
optional
Molding size
220*220*250mm
Power requirement
Output 24V
Layer thickness
0.1-0.4mm
operating system
Windows,Linux,MAC
Memory card offline
printing
Support TF card
Interface
language
English
Serial screen
YES
Environmental
requirements
Temperature 10-30 °
C
Humidity 20-50%
printing speed
Not more than
120mm/s
Nozzle
temperature
Room temperature to
250 ° C
Nozzle diameter
0.4mm
Hot bed
3mm thick integrated
heating aluminum
plate, forming
platform
Slicing software
Cura,repetier-host
Support
consumables
PLA, ABS, wood,
copper consumables
file format
STL,G-Code,OBJ
Consumable
diameter
1.75mm

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(2) Machine introduction
(3) Nozzle module exploded view
Gantry
Hot bed
Motherboard
Rack
Nozzle module
Extruder module
Foot
power supply
Quick pneumatic joint
Heat sink
Heating block
nozzle
Heater
Thermistor
Sheet metal protective case
3010 fan
4010 fan
Air guide

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(4) Machine assembly
1. Gantry installation
The screw used is M5*20
Two blue boxes in the picture, need
to be in one direction

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2. X-axis installation
Screws are all M4*16
If the nozzle block wheel cannot
enter, use a wrench to adjust the
eccentric nut.

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The tension of the belt can be
adjusted by the two screws on the
box