LONGER LK1 User manual

LK1 instruction manual
LONGER

catalog
A．product information....................................................................................................................2
(1) Model parameter...................................................................................................................2
(2) Machine introduction............................................................................................................ 3
(3) Nozzle module exploded view...............................................................................................3
(4) Machine assembly................................................................................................................. 4
1.Rack installation............................................................................................................... 4
2.wiring................................................................................................................................5
3.Power regulation..............................................................................................................1
4. Pre-use inspection and leveling...................................................................................... 1
5. Leveling method..............................................................................................................2
6. Place filament, feed.........................................................................................................3
B．Machine operation......................................................................................................................4
(1) Machine control.....................................................................................................................4
(2) Main interface........................................................................................................................5
C. Installation and use of Changlang 3D slicing software.............................................................. 6
(1) Software installation.............................................................................................................. 6
(2) Model selection............................................................................................................................. 7
..................................................................................................................................................... 7
(3) Software usage introduction......................................................................................................... 8
(4) Detailed software parameters............................................................................................... 8
(5) Export gcode format for printing...................................................................................................9
D. Instructions for printing online.....................................................................................................10
(1) Printer connection............................................................................................................... 10
(2) Software settings................................................................................................................. 10
(3) Online printing..................................................................................................................... 11
(4) Professional settings............................................................................................................ 12
E. Description of power failure and break detection function.........................................................13
(1) Power failure........................................................................................................................13
(2) Broken material detection................................................................................................... 13
F. Machine Usage FAQ Guide............................................................................................................ 15
Question 1: How to update the firmware?...............................................................................15
Question 2: What should I do if the machine does not discharge？.......................................15
Question 3: What should I do if the machine does not retreat when the material is returned?16
Question 4: What can I do if I can't power off?........................................................................16
Question 5: When the machine is leveled, when the nozzle moves to the left, it can be
leveled normally. When the nozzle moves to the right, it is found that the nozzle and the hot
bed are far apart or very close. What should I do if the spring is adjusted to the limit position?
................................................................................................................................................... 17
Question 6: After the machine is heated, the spit is normal, but when the first time of
printing, the silk falls on the platform and curls, and then after printing a few layers, what
should I do if it is off the platform?.......................................................................................... 17

1
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
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 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%,
within this range, the 3D printer can work normally; beyond this range,
this 3D printer will unable to achieve the best print results.

2
A．product information
(1) Model parameter
Model parameter model
LK1
Machine size
470*575*610MM
Frame
Classic aluminum
frame
Machine weight
10.6KG
Molding Process
FDM
Kit Package
Size
635*518*290MM
Number of nozzles
1
Weight after
packaging
14.2KG
Molding size
300*300*400MM
Power
requirements
Output 24V
Layer thickness
0.1-0.4mm(adjustab
le)
Operating
system
Windows,Linux,MAC
Memory card offline
printing
Support TF card
Interface
language
English
LCD screen
Yes
environmental
requirements
Temperature 10-30 ℃
Humidity 20-50%
Printing speed
≤120mm/s(30-60mm
/s recommended)
Nozzle
temperature
Room temperature to
250°C
Nozzle diameter
0.4mm
hot bed
Yes
Slicing software
Cura，repetier-host
Support
filament
PLA，ABS，wood
File format
STL，G-Code，OBJ
filament
diameter
1.75mm
filament color
Multi-color
optional

3
(2) Machine introduction
(3) Nozzle module exploded view
Gantry
Base
Control box
Filament Rack
Nozzle module
Extruder module
Hot bed
Teflon tube
Sheet metal
fixed block
Quick pneumatic joint
Heat sink
Heating block
Nozzle
Heater
Thermistor
Sheet metal
protective case
small fan
Big fan
Air guide

4
(4) Machine assembly
1.Rack installation
Gantry and base, M5*20 screw
limit block and profile, M4*18
screw

5
2.wiring
1: X-axis motor 2: Y-axis motor 3: Z-axis left motor 4: E-axis extrusion motor
1X-axis limit switch②：Y-axis limit switch③： Z-axis limit switch ④：E-axis break
detection switch
4
①
③
1
2
3
4
1
2
②
3
④

1
Note: For proper wiring, place the Y-axis motor and Y-axis limit switch cable
under the base to prevent the moving parts from scratching the cable.

1
3.Power regulation
4. Pre-use inspection and leveling
If the access voltage is 220V,
please adjust the power supply in
the control box to 220V, please
be sure to confirm before
powering on. Otherwise it will
burn the power
If the access voltage is 110V, please
adjust the power supply in the control
box to 110V, please be sure to confirm
before powering on. Otherwise it will
burn the power
shake the hot bed and the nozzle by hand to see if there is
any gap or sway. If there is any shaking, you can use an
open-end wrench to screw the hexagonal sleeve on the
corresponding pulley, which can adjust the tightness of the
hot bed and the nozzle.
Tip: After the machine is assembled, please
arrange the cable and move the three-axis
motion by hand to see if it affects the
movement and the jamming phenomenon.

2
5. Leveling method
You can manually click the XY zero
and Z zero in the Movement
interface, then unlock, manually
move the hot bed and the nozzle,
and then adjust the leveling nut so
that the distance from the nozzle to
the hot bed is about one A4 paper
thickness。
Turn on the machine, click the levelling button, click
the four buttons in turn, the nozzle will move to the
corresponding position correspondingly. After
waiting to move to the corresponding position, you
can manually adjust the hand nut to adjust the
distance between the nozzle and the hot bed to
approximately one A4. Thicken the paper, tighten
the screw [tighten counterclockwise], and increase
the distance between the heating plate and the
nozzle. Loosen the screw [screw in the clockwise
direction] and the heating plate will be close to the
nozzle. Adjust the other three points in turn to
complete the leveling.

3
6. Place filament, feed

4
B．Machine operation
(1) Machine control
LK5
Move Head
±X.±Y.±Z
±X.±Y.±Z（正负移动）
X.Y.Z(return to zero)
Motor unlock
Distance adjustment
Return
Files
Start print
Page turning
Return
Adjustmen
Pause print
Adjust parament
Stop print
暂停打印
喷嘴温度
Hotbed
temperature
Speed of
fan
Nozzle
temperature
Print speed
Discharge
flow
Distance
adjustment
More
Reture
Extrud
e
Hotbed temperature
Nozzle temperature
in and out solw
Automatic in and
out (filamnet)
Distance adjustment
Stop
Leveling
Top left
Bottom left
Top right
Bottom
Motor unlock(x.y)
Reture

5
(2) Main interface
返回
More
Click on the file
to enter
Refresh
Reture
Save
Page turning
Recovery
Power failure
recovery

6
C. Installation and use of Changlang 3D
slicing software
(1) Software installation
Click to enter the next step, select the default C drive for installation, otherwise the software will not open
normally
Double-click the LONGER 3D Slicer to enter the installation guide page
Follow the software installation guide reminder and click Next to complete the
installation.

7
(2) Model selection
Open the software and choose the language you want
According to the model of the machine purchased, select the corresponding model. Incorrect
selection will cause the machine parameters to be incorrect and the printer will not work properly.
If it is a machine of another brand, you can also choose other models for related settings or use it.

8
(3) Software usage introduction
(4) Detailed software parameters
Layer thickness: 0.1 ~ 0.4mm, high accuracy of 0.1mm, long printing time, generally 0.2mm, low
accuracy of 0.4mm, short printing time.
Wall thickness: set to 0.4mm is very thin, generally set to 1.2 high, it will be firm, and printing
time will increase.
Turn on rollback: The purpose of thread withdrawal is to prevent the silk from leaking out when
printing quickly, otherwise it will affect the appearance.
Bottom / Top Thickness: To make the top print more perfect, the bottom is flat.
Fill density: If the intensity is not very high, 20% is fine; if the intensity is high, increase it, and the
printing time will increase.
Printing speed: Generally set between 30-100, the higher the speed, the lower the accuracy.
Printing temperature: depending on the material, it is generally 190 ~ 210 degrees.
Support types: divided into semi-supported and full-supported. Models that have suspensions
relative to the structure usually require additional support, but the surface will be relatively
unsightly after removing the support.
Adhesion platform: "None" adds nothing; the "bottom edge" edge increases the bottom area;
the "bottom mesh" base makes the model adhere more firmly. In order to make the model stick
to the base better, add a base plate or edge. It is best to add a base and edge to the model with a
small base area.
3D printer supports gcode format files, so you need to import the STL format model into Changlang 3D slicing
software for slicing operation. To print a fine model, you need to have a deep understanding of the slicing software
that controls the print path. Print out the various models you want, and set each parameter of the machine to the
parameter bar to pop up the corresponding explanation.

9
Diameter: 1.75mm Flow: 100%
Nozzle aperture: 0.4mm.
Retraction speed: the speed of retraction when printing the model.
Retracted length: The length of the material withdrawn, generally 4.5 ~ 8mm.
Initial layer thickness: Print the thickness of the first layer, which is the default.
Initial layer line width: 100% will be thicker and denser, just default.
Bottom Cut: The length of the bottom cut of the model.
Two extrusion overlaps: 0.15mm. By default.
Idling speed: The moving speed of the nozzle when it does not squeeze consumables.
Bottom speed: The speed of printing the first layer. The slower speed is that the model is better
attached to the bottom surface.
Filling speed / top / bottom speed / shell speed / inner wall speed: The default is 0, which is the
same as the printing speed.
Minimum print time for each layer: The default is sufficient.
Turn on fan cooling: Turn on the nozzle cooling fan.
(5) Export gcode format for printing
After setting the parameters such as whether to add support according to different models, first
adjust the model preview mode into a layer preview format to see if there are broken surfaces and path
errors. After checking that it is correct, import the gcode file into the TF card, and then insert the printer
Card slot.

10
D. Instructions for printing online
Changlang 3D printers support online printing operations, but because the computer sends
instructions continuously for a long time, there are many different settings on the personal
computer (some computers will set the energy-saving mode or the screen mode, etc.) and the
computer will freeze if it runs. The interruption fails, and online printing is generally not
recommended.
TF card offline printing is a very stable and mature printing method, and it does not occupy
the computer. It is recommended to choose offline printing as much as possible. If you need to
know more about the printer, you can print online according to the following steps.
(1) Printer connection
(2) Software settings
Prepare a data cable with one end connected to the printer serial port and one end to the
computer USB port. Plug in the power cord and turn on the switch.

11
(3) Online printing
Open the Changlang 3D slicing software. The first step is to turn on the model. The second
step is to open the model settings. The third step is to select the serial port number displayed by
each computer. Generally, the larger serial port is selected. Normally select "AUTO" for the
special rate. If you still cannot connect normally, select 115200. After the port is selected
correctly in step 5, the original U disk icon will change to a printer icon. At this time, the printer is
connected。
After slicing the model to be printed, open the file in the first step and directly select the
print in the second step. If the printer is connected at this time, the print status bar will pop up.
If there is no connection, the save gcode code will pop up. In the third step, click print. At that
time, the temperature of the hot bed and the temperature of the print head will rise to the set
temperature, and then printing will start。

12
(4) Professional settings
If you want to print a more professional page online, you can set it by the following
steps. Select file in the first step, select parameter settings in the second step, and
change the print window settings in the third step to professional. Then start printing the
page online and it will become a professional page, you can send G codes, you can
control the movement of each axis. If non-professionals use it with caution, it is generally
not recommended.