User Manual[MD-400D 3D Printer]*Please read this guide carefully before using this printerShenzhen MINGDA Technology Co.,Ltd
V1.3

Contents
Cautionary Notes ……………………………………………………………………………………………...…............................................ 1

1 Overview ………………………………………………………………………………………………………………….......... 2
2 Device Introduction ………………………………………………………………………………............................. 2
Device Parameters ……………………………………………………………………………………………...….......................................... 2
Packing List ……………………………………………………………………………………………………………........................................... 3

3 Operational Steps ……………………………………………………………………………………........................... 4
Part assembly .......…………………………………………………………………………………………….................................................. 4
Install the warning light ………………………………………………………………………………................................................ 4
Install the antenna ……………………………………………………………………………….....……............................................ 4
Power on ………………………………………………………………………………..............…….................................................. 5
Power off ………………………………………………………………………………..............…….................................................. 5
Startup Configuration ……………………………………………………………………………………….................................................. 6
Printer Calibration …………………………………………………………………...........………...….................................................... 7
Z Calibrate ………………………………………….……………………………….....……....................................…………………….. 7
Auto Bed Leveling ………………………………………………………………..............……....................................................

7

XY Axis Offset Calibration ……………………………….………………............................................................................ 8
Z Axis Offset Calibration …………………………………………………….....…….............................................................. 9
Input Shaper …………………………………………………………………….....……................................................................ 9

4 Operating interface introduction ……………………………………………………….................................. 10
5 Insert filament .….........…………………………………….………......…..........……….....………....…......…..... 14
6 Unload filament .........……………………..……....……...........…......…........………......…........……….....

16

7 Resume Printing .........……………………............……....………......…........………......…........………..... 17
8 Slicing Software Installation and Usage …....………......…........………......…..................………..... 18
Installation …………………………………………………………………................................................................................ 18
Configuration ……………………………………………………………………………….....……..................................................

18

Usage ……………………………………………………………………..............…….................................................................

19

Printing ........….........…………………………………….…………......…....................................................................................

20

Local Printing …………………………………………………………………............................................................................

20

LAN Printing ……………………………………………………………………………….....……..................................................... 20
Print Mode ………………………………….……………………….…………......…........................................................................... 23
Copy Mode …………………………………………………………………................................................................................. 23
Mirror Mode ……………………………………………………………………………….....……..................................................... 24
Print Two Colors ……………………………………………………………………..............…….................................................

25

Printing Support ……………………………………………………………………..............…….................................................

27

Printing ...…...…...…...…...…...…...…...…...…...…...…......…...…...…...…..….…..….…..….…..….…....…....…..…..…...........…..

28

9 Maintenance and Care …...…...…...……...……...……...…...…...…...…..……...…...…....…...…............... 29

Thank you for choosing MINGDA Technology's products!

For the best experience, please read this user manual carefully and follow the instructions to operate the printer.
If you encounter any issues with the printer, please contact us using the contact information provided at the endof this user manual. Our team is always ready to provide you with high-quality service.

To enhance your usage of our product, you can also learn how to use the printer through the following means:

1. User Manual: Relevant instructions and videos can be found on the included USB drive.
2. You can also visit our official website (www.3dmingda.com) for information on software, hardware, contact
details, device instructions, device specifications, and warranty information, among other things.

Cautionary Notes

1. Please do not place the printer in environments with significant vibrations or instability, as machine
shaking can affect the print quality.
2. Avoid touching the nozzle and heated bed while the printer is in operation to prevent potential burns fromhigh temperatures, resulting in personal injury.
3. Refrain from moving the device during the printing process to prevent accidents and injuries.
4. Do not dismantle the equipment or alter circuit settings without authorization.
5. Avoid using the device in high-temperature or humid environments to prevent compromising device
performance or creating safety hazards.
6. In case of an emergency, immediately cease using the device and power it off.

1

1. Overview
This manual provides instructions on the usage of the 3D printer, covering aspects such as an overall introduction
to the device, operational procedures, maintenance, and care. The aim of this manual is to assist you in correctly using
and maintaining the 3D printer, ensuring device performance and safety, extending the lifespan of the equipment,
and enhancing print quality. We hope that you follow the requirements and recommendations outlined in this manual
during usage, and maintain attention to and care for the equipment. Thank you for choosing our product, and we wish
you a pleasant experience!

2. Device Introduction
Device Parameters

Basic Parameters
Product Model

MD-400D

Machine Dimensions

690*790*910mm

Max. Build Dimensions

400*400*400mm

Duplicate Mode

400(2*200)*400*400 mm

Mirror Mode

320(2*160)*400*400 mm

Print Technology

Fused Deposition Modeling (FDM)

Rated Voltage

100-240V, 50/60Hz

Rated Power

800W

Ambient temperature

10℃-30℃ / 50°F-86°F

ExtrudersTwo

Max. Nozzle Temperature

350℃

Max. Bed Temperature

110℃

Screen7inch touch screen

Printing Method

USB Flash Disk / LAN Printing

Connection

USB Flash Disk / WIFI / Ethernet

Power Loss Recovery

Yes

Filament Detection

Yes

Fast Auto leveling

Yes

CameraYes

Fast Calibrate Offset

Yes

Supported Filament

2

Common filament: PLA, TPU, PETG;
Engineering filament: PET-CF/GF, HtPA-CF/GF,
ABS-GF25/CF20, HtPA-GF25/CF25;
Support filament: S-Mulit, S-HtPA, PVA, etc

Packing List

Tool List

U-diskNozzle*2

Power cable

Diagonal pliers

Allen wrench

Auxiliarycalibration board

7mm Sleeve

Warning lights

AntennaNote: The 400D is equipped with a hardened steel nozzle. If you frequently print
high-temperature materials, long-term printing will cause wear to the nozzle. We
recommend replacing the nozzle every 500 printing hours.

33. Operational StepsPart assembly
1. Install the warning light.
Rubber Ring

Nut

Green light: Indicates that the printer is working properly.
Red light: Indicates that the printer is in an emergency stop or fault state, requiring immediate
attention or repair by the user. For example, overload, short circuit, or error message on the screen.
Yellow light: Indicates that the printer is in a warning or abnormal state, requiring user attention orintervention. For example, insufficient filament or paused printing.

2. Install the antenna.

4

3. Power on

Insert a power socket, Press the switch

Press the power to turn on the printer4. Power off
When you turn off the printer, please don't press the power directly!
Click "Settings-System-Shutdown-Printer" to turn off the printerClick the "Settings"

Click the "System"

Click the "Shutdown"

5

Startup Configuration
1. Select Language and Time Zone
3

2
1
1
Click
to choose the language,
and clickto proceed to thenext step.

2. Wi-Fi

2
Select timezone, click
click
to next step.

to confirm, and[Time zone settings will take effect afterconnecting to Wi-Fi and restarting the system.]

Note: If printer can’t detect your WiFi, you can click
to skip this step. After finishing the startup
wizard, move the printer to a position which have stronger WiFi signal, connect it again.

Select the WiFi and click

Enter the WiFi password and click(If your WiFi cannot be displayed for more than20s, please click

to refresh)

When 'connected' appears on the screen,

After connection, please remember the IP address andplease clickcheck the page 20 to connect the printer with the PC or
laptop. Click
printer to restart.

6

to enter the main interface. Wait forPrinter Calibration
1

2

3

4

5

Tip: Please follow the sequence shown in the diagram to calibrate step by step.
Z Calibrate→ Leveling→ XY Offset→ Z Offset→ Input Shaper

1. Z Calibrate

Click "Start", wait Z axis calibrating
and click "Accept" and confirm

Click "Z Calibrate"

1

Put an A4 paper between the nozzle andheated bed.

2. Auto Bed Leveling

Click "Leveling"

Click

2

While moving the A4 paper back and forth,adjustand. When you feel slightresistance as the paper moves, you can clicktheto save.

to start auto-leveling,which will take approximately 3 minutes

Clickto save the value,

the printer will reboot automatically.

7

3. XY Axis Offset Calibration

The camera was coverd with the PEI,
remove the PEI at first.

Put the Auxiliary calibration board on thecenter of platform

Click "XY Offset"

After the camera Led light up, Click "Start" , andthe left extruder will move to the calibration
camera's position.

1

1

2

2

3

Adjust the left extruder nozzle to align with

Adjust the right extruder nozzle to alignthe crosshairs

with the crosshairs"Confirm Pos"of the screen and click"" and click "of the screen click"

Tips: Wipe the nozzle clean before calibration to avoid any interference during the process.
8

4. Z Axis Offset Calibration
Safety Reminder: To ensure that the nozzle correctly lands on the sensor, please calibrate the XY axis before
calibrating the Z axis. While the extruder is moving downward, pay close attention to its movement. If there isexcessive deviation or signs of extreme extrusion pressure, click the return in the top left corner of the screen or
the emergency stopin the bottom left corner to stop the calibration. Contact customer support or refer toofficial videos for troubleshooting solutions.

Click "Z Offset"

After finishing, click “Accept”
confirm

Click “Start”

andto start Z offset automatically

Before Z-axis calibration, please finish the XY-axis
calibration first. During the Z-axis calibration, if
you notice that the extruder is making a loudnoise or the nozzle is not aligned with the sensor
when pressing down, press
button to halt all
operations and consult our customer service.

( Take out the Auxiliary calibration board, put the PEI sheet back to the heated bed. )5. Input Shaper

Click "Input Shaper"

Click "Auto-calibrate"，After calibration iscomplete, click the save button.

94. Operating interface introduction
Main interface

01
02

03

04

11

05

10

06
07

09
08
Primary interface

10

Explain01

Temperature

02

Time

Time display.

03

Move

Adjust the value of the XYZ axis.

04

PreheatPre-set nozzle & hotbed’s temperature.

05

ExtrudeTo unload or load filament.

06

Calibrate

Printer Calibration

07

Settings

Printer’s printing value adjustment.

08

Print

Start printing.

09

Stop

Emergency stop .

10

Homepage11

ReturnTemperature display area.

Return to the main page.
Return to the previous page.

Calibrate:
01

02

05

06

03

Secondary interface

04

Explain01

Z Calibrate

Calibrate Z offset

02

Leveling

Auto-leveling03

XY Offset

Calibrate XY axis

04

Z Offset

Calibrate Z axis

05

Input Shaper

06

Ajust Z offset Pos

Test the resonance compensation value.
Ajust Z offset Pos

11

Settings:

01

02

03

04

05

06

07

08

Secondary interface
01

Network

02

Fan

Cooling fan adjustment

03

Leds

Turn on/off Light

04

SystemMachine shutdown, restart, reset function

05

ManualManual06

Troubleshooting

07

Cautions

Cautions

More

Includes some basic settings such as time, language,
screen timeout, notification sound toggle, and automatic
shutdown after printing completion.

08

12

ExplainTo connect Wi-Fi

Troubleshooting

Printing Interface:

01

02

03

04

Figure 1

Figure 2

Secondary interface

Explain01

CancelStop printing

02

Pause

Pause printing

03

Fine Tuning

04

Settings

Adjust Z-offset, Printing Speed, Printing Flow
[Please refer to Figure 1.]
Basic setting, browse camera, adjust cooling fan, light andExclude object. [Please refer to Figure 2.]13

5. Insert filament
1. Put the filament on the holder (Pay attention to the direction of feeding
filament)

2. Pull the filament out from the other end of the tube, insert it in the extruder.

14

3. Feed out the filament
1
2

Click Extruder “T0”

Click the "Extrude", selectDistance “100mm” and Speed”5”,click Load

1
2

Click Accept, hot end will beheated up automatically.

Click Extruder “T1”

, repeat thestep 2 and 3 again.

4. When the filament feeding is finished, insert the tube into the extruder

15

6. Unload Filament
1

Select the extruder you want to unload
filament and heat it up to 240°C.

Click the "Extrude"

Click “unload”

and wait for the extruder

to unload the filament automatically.

162

7. Resume Printing
400D is equipped with a resume printing function to assist you in resuming the print fromthe point of interruption.

1. After power failure

After power restored, turn on theprinter, click “Accept”

Please wait the printer resuming.

After reaching the specified temperature,
the printer will automatically transition
to the printing interface.

2. After filament run out

Printer will stop working, andyellow light up.

Replace new filament into the
extruder, click load till thefilament was feed out.

Click “Resume”,
continue to print from thepoint of interruption.

17

8. Slicing Software Installation and Usage
Installation:
Search "www.3dmingda.com/download" in any Broswer.
Download "MINGDA OrcaSlicer"

Configuration:

If you are the first time to use MingDa OrcaSlicer, you willenter the configuration wizard.

1

1

2
Select MingDa MD-400D, Click ”Confirm”.

18

2
Select the desired filament type.

UsageClick “Prepare”.

1
2

4
3

Select the printer model, filament type and printing parameter.

4

1

5

2

3

Click
, upload your STL in your slicer, adjust your model parameter, after finishing, click “Slice plate” tocreate the Gcode file.

19PrintingLocal Printing

Insert the U-disk, then click the"Print" .

Find the folder and Click the arrowon the rightSelect the test gcode which
was preset in the U-disk.

LAN Printing
Ensure that the printer and the computer host are on the same local network.

Click "Settings"
settings page.

to enter the

Click "Network"
the network page.

to enter

Check the printer's IP address.

1

2

3

4
Click WIFI

20

, select Host type as Octo/Klipper, enter the printer’s IP address, and click “Test” and “OK”

File Transfer:

1
2

Click the dropdown iconin the top right corner , select "Print."

1

2

Click "Print" and choose "Upload and Print."

21

Device Connection
After successful connection, click on "Device"

Enter the control interface below the diagram

1.Task List

2.Temperature Control

3.Camera

5.Printer Limits

6.Console

4.Movement
Control
1. Task List: Drag G-code files to this task list for printing.
2. Temperature Control: Displays machine temperature changes and allows pre-setting
nozzle and bed temperatures.
3. Camera: Monitors the printing status.
4. Movement Control: Controls the movement of each axis and allows compensation
settings after leveling.
5. Printer Limits: Controls the maximum acceleration of the printer, usually doesn't need
to be changed.
6. Console: Sends G-code commands to run the machine and displays error output.
22

Print Mode
Copy Mode

Print Size: X * Y * Z: (2*200) * 400 * 400mm

In duplication mode, select the MingDa 400D 0.4mm nozzle (Left) for slicing. The models should be placed on theleft side and not exceed the centerline of the platform, as shown in the image.

In the printer interface:

Select "Print."

Insert the U-disk.

Choose the print file for printing.

Choose “Copy Print”.

23

Mirror Mode

Print Size: X * Y * Z: (2*160) * 400 * 400mm

In mirror mode, select the MingDa 400D 0.4mm nozzle (Left) for slicing. Place the models on the left side, ensuring
they do not exceed the red area on the platform in the image to prevent nozzle collisions.

In the printer interface:24

Select "Print."

Insert the U-disk.

Choose the print file for printing.

Choose “Mirror Print”.

Print Two Colors

Printing size: 400 * 400 * 400mm

Selecting the MingDa 400D 0.4 nozzle (Dual)

1
2
3
4

1. In the filaments column on the left side of the interface, click "+" to add another filament.
2. Choose and modify the filament information.
3. In the Process section, click to switch to the "Objects" option.
4. Click on the color box next to the STL file to select the desired filament.

In the printer interface:

Select "Print", Insert the U-disk.

Choose the print file for printing.

Choose “ Print”.

25

Double extrusion: Start the Prime tower
Because there is always one printer in standby mode during the printing process, it is easy tocause defects such as wire drawing and material leakage. Prime tower can solve this problem,the extruder will print a prime tower before each layer printing. Any material leakage will be
printed on the tower, effectively avoiding the phenomenon of material leakage when replacing
the extruder.
If you want to print the following two modes, we recommend adding this option to your Gcode.

12

3

1. Select the "Global" section.
2. Select the "Others" section.
3. Check the "Enable" option in the "Prime tower" settings.

Note: The printing position of the Prime tower cannot coincide with the model26

Printing Support

Printing size: 400 * 400 * 400mm

Selecting the MingDa 400D 0.4 nozzle (Dual)

6
1
2
3
4

5

1. On the left side of the interface, in the filaments column, click "+" to add another filament.
2. Choose and modify the filament information.
3. Then, select the "Support" section.
4. Check the "Enable support" option.
5. In the "Filament for Supports" option, choose the filament needed for supports.
6. Click "Slice plate" to preview.

In the printer interface:

Select "Print", Insert the U-disk.

Choose the print file for printing.

Choose “ Print”.

27

Printing1

2

3Open the settings interface in the Printer tab, and check 'Auxiliary Part Cooling Fan' under "Basic Information-Accessory".

4
2
1

3

Due to the different feature of filament, if you do not need an auxiliary fan or need to adjust the fan speed, please go to theFilament tab, open the settings interface, and choose Cooling-Auxiliary Part Cooling Fan. Adjust the Fan Speed as needed.

28

9. Maintenance and Care
Cleaning the Nozzle: After printing is complete, promptly clean the residue on the nozzle using a tool andtaking advantage of the nozzle's residual heat. Avoid touching the nozzle directly with your hands to prevent
burns.
Replacing Filaments: Timely replace filaments based on the type and actual usage. It is recommended to use
filaments recommended by the manufacturer. Seal filament not in use for an extended period, as excessive
exposure to moisture in the air can make the filament brittle.
Checking the Platform: Regularly check if the print platform is flat. If there is deformation or damage, contact
the manufacturer or dealer for repairs.
Regular Lubrication: Periodically apply lubricating oil to the lead screw and guide rails. During the operationof the printer, friction between various parts occurs. Without proper lubrication, it can lead to wear anddamage.
Software Updates: Regularly update the printing software to improve print quality and efficiency.

Replace the hot end
1. Remove the screws on both sides of the print head cover (a total of 4);
2. Unplug the connecting terminal on the hot end and loosen the top wire that fixes the hot end;
3. Remove the entire hot end;
4. Insert the hot end that needs to be replaced, tighten the top screw when it is in place, and then plug in theconnecting terminal.
5. Install the print head cover and circuit board protective coverNote: After replacing the hot end, it is necessary to recheck the deviation values of the left and right heads. If
the deviation is too large, it needs to be recalibrated

29

Shenzhen MINGDA Technology Co., Ltd

Tel: 0086-13530306290
Email: support@3dmingda.com
www.3dmingda.com
Address: No. 20, Dahe Industrial Zone, Longhua District,
Shenzhen, 518110, Guangdong Province, China.
Official Website

Customer Support