3DGence DOUBLE P255 User manual

USER’S MANUAL
3DGence DOUBLE P255

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Contents
I INTRODUCTION ............................................................................................................................................................................4
1. INTRODUCTION......................................................................................................................................................................4
2. PRINTING MATERIALS ............................................................................................................................................................4
3. SYMBOLS ................................................................................................................................................................................5
3.1. Auxiliary symbols used in the User's Manual .................................................................................................................5
3.2. The printer's backlight indications..................................................................................................................................6
4. SAFETY MEASURES.................................................................................................................................................................6
4.1. General information .......................................................................................................................................................6
4.2. Relocating the printer.....................................................................................................................................................8
4.3. Choosing proper installation place for the printer .........................................................................................................8
4.3.1. Specification of connection .......................................................................................................................................10
4.4. Before starting the printer............................................................................................................................................10
II PRINTER DESCRIPTION ..............................................................................................................................................................11
1. DESIGN OF PRINTER .............................................................................................................................................................11
1.1. Kinematic system..........................................................................................................................................................13
1.2. Heatbed ........................................................................................................................................................................14
1.3. Extruders.......................................................................................................................................................................14
1.4. Dual hotend module .....................................................................................................................................................15
1.5. Printer's power supply management ...........................................................................................................................15
2. SET OF PRINTER'S ACCESSORIES ..........................................................................................................................................16
3. USER INTERFACE ..................................................................................................................................................................16
3.1. Idle state menu .............................................................................................................................................................16
3.2. Menu during operation ................................................................................................................................................24
3.3. Menu structure.............................................................................................................................................................26
III PREPARATION FOR WORK ........................................................................................................................................................30
1. FIRMWARE UPDATE .............................................................................................................................................................30
1.1. Updating the firmware .................................................................................................................................................30
2. UNPACKING AND STARTING THE PRINTER ..........................................................................................................................30
2.1. Unpacking the printer...................................................................................................................................................30
2.2. Starting the printer .......................................................................................................................................................31
3. HEATBED PREPARATION ......................................................................................................................................................31
3.1. Heatbed calibration ......................................................................................................................................................31
4. ACTIVITIES CONNECTED WITH PRINTING MATERIAL...........................................................................................................33
4.1. Material loading............................................................................................................................................................33
4.2. Material unloading .......................................................................................................................................................34
4.3. Failure to load/unload material....................................................................................................................................35
4.4. Change of material during printing process .................................................................................................................36
4.5. Depletion of material during printing...........................................................................................................................37
IV FIRST PRINTOUT .......................................................................................................................................................................37
1. STARTING A READY CODE FROM SD CARD ..........................................................................................................................37
2. ASSESSMENT OF THE PRINTER OPERATION QUALITY..........................................................................................................38

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3. REMOVING PRINTOUTS FROM THE PRINTER.......................................................................................................................39
4. CLEANING.............................................................................................................................................................................40
4.1 Hotend cleaning.............................................................................................................................................................40
4.2. Heatbed cleaning ..........................................................................................................................................................40
5. SLEEP MODE.........................................................................................................................................................................41
6. SWITCHING THE PRINTER OFF .............................................................................................................................................41
V SOFTWARE ................................................................................................................................................................................42
1. INTRODUCTION....................................................................................................................................................................42
1.1. Quality guarantee .........................................................................................................................................................42
2. INSTALLATION ......................................................................................................................................................................42
VI DUAL HOTEND module ............................................................................................................................................................43
1. HOTEND CHANGE ............................................................................................................................................................44
VII COMPLEMENTARY INFORMATION..........................................................................................................................................47
1. AUTOCOMPENSATION AND AUTOCALIBRATION.................................................................................................................47
VIII SERVICE ACTIVITIES ................................................................................................................................................................48
1. INDICATIONS FOR HEATBED CALIBRATION..........................................................................................................................48
1.1. Heatbed change............................................................................................................................................................48
2. DUAL HOTEND MODULE CALIBRATION ...............................................................................................................................49
2.1. Precise axes calibration ................................................................................................................................................49
2.2. Calibration of offsets along X, Y and Z axes ..................................................................................................................51
3. SYSTEM ERRORS AND THEIR REMOVAL ...............................................................................................................................55
IX ENCLOSURE ASSEMBLY ............................................................................................................................................................57
IX DICTIONARY..............................................................................................................................................................................59

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I INTRODUCTION
1. INTRODUCTION
Thank you for choosing 3DGence DOUBLE P255 printer. This User's Manual provides clear and legible information on this
professional 3D printer in order to guarantee the highest quality of printing as well as long-term repeatable and safe operation
of the printer. The mission of 3DGence is to provide top-class professional equipment and solutions.
The User's Manual contains information necessary for proper and safe use of the printer. Read the entire User's Manual
carefully before using the printer. The supporting document for the User's Manual is the technical documentation available on
our website: www.3dgence.com.
The persons who have not read the User's Manual must not use the printer. Wrong use may damage the printer or cause
bodily injuries or even endanger the life of the operator.
On the last pages of this User's Manual there is the dictionary of terms and concepts connected with 3D printing. The dictionary
will facilitate understanding the professional terminology and explain some terms appearing in this User's Manual.
Before starting the operation of 3DGence DOUBLE P255 printer, the user must read the entire User's Manual and accept the
instructions and exceptions included in the User's Manual.
2. PRINTING MATERIALS
FFF technology (Fused Filament Fabrication) used by 3DGence DOUBLE P255 printer consists in depositing plasticized
thermoplastic material (plastic) layer by layer. This plastic is the printer's operating material. The thermoplastic material is used
in the form of a filament with a precisely defined diameter, wound on a spool (fig. 1). 3DGence DOUBLE P255 printer uses the
filament with the diameter of 1.75 mm.
Fig. 1 Filament spool

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3DGence DOUBLE P255 printer is equipped with two extruders and two hotends. Thanks to this, two materials can be used in
one printed model. This solution makes it possible to:
•print geometrically complex models that require soluble support structures,
•print two-colour models,
•print functional models that combine characteristics of two specific materials in the required manner.
3DGence DOUBLE P255 printer can use a wide range of printing materials available in many colours. The Certified Material
Base, available at www.3dgence.com, has been created for 3DGence DOUBLE P255 printer.
3DGence is not responsible for the quality of printouts made of the materials other than those included in the Certified Material
Base and for damage caused by the use of such materials as well as it does not provide support for the quality of the printouts
made of the filaments other than those included in the Certified Material Base.
3. SYMBOLS
There are warning symbols placed on 3DGence DOUBLE P255 printer to warn about potential hazards. The following symbol
indicates high temperature occurring in a given place:
Take special care when working in zones marked with the above symbol and use protective gloves. Failure to comply with
safety rules may result in severe burns.
3.1. Auxiliary symbols used in the User's Manual
Throughout this User's Manual the following symbols are used. They identify the situations that are potentially dangerous to
health or may cause damage to the printer. Always adhere to the warning symbols. Negligence may cause the printer's damage
excluded from the guarantee cover as well as bodily injuries.
DANGER:
The situation or procedure described is potentially dangerous and it may result in damage to the printer or
cause injury to the operator. Exercise care.
ATTENTION:
The situation or procedure described is potentially dangerous and it may result in damage to the printer.
Exercise care.
PROTECTION:
Protective gloves, delivered with the printer, must be worn when performing the activities described. Put on
protective gloves before performing these activities.

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3.2. The printer's backlight indications
3DGence DOUBLE P255 printer is equipped with LED backlight located under the printer's upper plate. The LED backlight
illuminates the printout during the printer operation and is also a form of signalling device. The description of all backlight
colours and their meanings is given below (table 1).
Tab. 1 Meaning of backlight colours in 3DGence DOUBLE P255 printer
COLOUR
MEANING
Green
Safe temperature of the heatbed (below 40°C). After completed printing, the printout can be
safely unloaded.
Red
Heatbed temperature exceeds 40°C.
Do not touch the heatbed –there is a risk of burns. After completed printing, do not remove
the printout from the heatbed until the backlight turns green.
White
The printer is working. The heatbed is hot - do not touch it.
There is a serious risk of burns.
Yellow
Failure of the heating devices. If the hotend has been installed correctly, immediately
disconnect the printer from power supply and contact the service department.
The backlight colour indicates the heatbed temperature not the hotend temperature! The hotend temperature is
shown only on the display!
4. SAFETY MEASURES
The information below describes the correct operating conditions of 3DGence DOUBLE P255 printer. Failure to comply with
the indications and contraindications may significantly reduce the life of the printer, violate the guarantee conditions or
endanger the health of users.
4.1. General information
The printer must not be installed:
•in open space, outdoors,
•in damp places or in places at risk of flooding,
•in the vicinity of volatile and flammable substances,
•near concentrated acids, caustic vapours or corrosive substances,
•in places easily accessible to children,
•using the network without a protective earth lead (PE),

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•using the network without a fuse or the network protected with a fuse with a rated current intensity below
16A.
Do not:
•touch the printed model, heatbed or hotend during printing,
•insert any body parts or objects into the printer's working area during printing –the printer may get damaged
or the operator may get injured,
•touch the heated nozzle with your hands, even with protective gloves,
•bend over the heated hotend or the hotend area during the printer operation - there is a risk of facial burn
injuries,
•touch live parts,
•touch linear guides and trapezoid bolts during the printer operation,
•operate the printer with wet hands,
•put any objects on or under the printer's table –during the printer operation or when the printer is at
standstill;
•put containers with liquids on the printer,
•leave the working printer without the control of an adult who is able to take appropriate steps in the event
of a failure,
•leave the working printer in a room with children or animals,
•disassemble the printer or hotends; make unauthorized repairs –the printer or hotends may get damaged.
Adhere to the following instructions:
•use only earthed power sources (to avoid electric shock),
•when disconnecting the plug from the power source, pull the plug by its housing not by the cable,
•disconnect the printer from the power source before any repair or maintenance activities,
•make sure that the mains voltage corresponds with the printer's specifications,
•protect the power lead and plug against damage,
•disconnect the power plug before relocating the printer,
•disconnect the power plug if the printer will not be used for a longer period of time,
•periodically remove external contaminations from the hotend nozzles (using non-flammable material),
•always wear protective gloves when operating the printer,
•ensure the possibility of quick response in the event of a break-down/print failure,
•each time before starting the printer, carefully inspect the direct vicinity of the printer and remove all
obstacles and contaminations with which the printer could collide or which could in any way hinder the free
movement,
•guarantee free access to the printer for the operator, throughout the printer operation.
Heated heatbed and hotends remain hot even after completed printing. Check their temperature on the display before
touching them (fig. 2) or wait at least 30 minutes after switching the printer off (e.g. in order to clean or remove the
model, change the hotend, etc.)
Fig. 2 Temperature indications for: 1, 2. hotends | 3. heatbed

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4.2. Relocating the printer
To ensure the safety of the user and to avoid accidental damage to the printer, the following rules must be followed when
relocating the printer:
•before relocating the printer, switch it off and disconnect it from the power source,
•the printer should be cooled down, the operating material and all loose elements and accessories should be removed from
the printer,
•the printer should be lifted only by the handles designated for this purpose (fig. 3); do not lift the printer by any other
elements,
•the printer should not be carried by children and the elderly due to its significant weight (about 25 kg).
Fig. 3 Locations of handles for printer handling
4.3. Choosing proper installation place for the printer
The printer installation place should meet the following conditions:
•the printer should work at room temperature,
•the printer is not designed for work in a dusty environment,
•ventilation suitable for a room size should be ensured,
•the printer should be installed on a hard and stable ground,
•the printer should not be exposed to direct sunlight,
•ensure sufficient free space around the printer based on the printer's external dimensions and working range
of the axes (fig. 4, 5),
•keep the printer away from other heat sources and draughts,
•the printer's installation place should be equipped with a 230V/50Hz mains socket (110V version for the USA
market),
•uninterruptible power supplies (UPS) should be used in order to ensure that the printing process is not
stopped in case of instantaneous current decay.

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Fig. 4 The maximum dimensions of the printer taking into account the extreme
positions of the heatbed –right side view
Fig. 5 The maximum external dimensions of the printer –overview

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4.3.1. Specification of connection
The electrical characteristics of the 3DGence DOUBLE P255 are shown below (tab.2.3). The connection should be adapted to
the given values.
➢DOUBLE P255 printers with a serial number that begins with the symbol: DOUB
(the printer's serial number is located on a sticker located on the back of the printer and it is preceded by the symbol: S/N).
Voltage: 220-230V AC;
Frequency: 50-60 Hz;
Network with a protective earth lead (PE), protected with a fuse of a rated current intensity not less than 16A;
Rated power consumption: 600 W (maximum instant power consumption: 1.9kW);
Current intensity: ~2,6 A (8 A).
Tab. 2 Electrical characteristics of devices with a serial number beginning with the "DOUB" symbol
Working condition
Power consumption of the device
Standby
4 W
Warming up
500 W
Printing
120 W
Maximum instant power consumption
1900 W
➢DOUBLE P255 printers with a serial number that begins with the symbol: DOUBA
(the printer's serial number is located on a sticker located on the back of the printer and it is preceded by the symbol: S/N).
Voltage: 110V AC;
Frequency: 50-60 Hz;
Network with a protective earth lead (PE), protected with a fuse of a rated current intensity not less than 16A;
Rated power consumption: 600 W;
Current intensity: ~5 A.
Tab. 3 Electrical characteristics of devices with a serial number beginning with the "DOUBA" symbol
Working condition
Power consumption of the device
Standby
4 W
Warming up
500 W
Printing
120 W
Maximum instant power consumption
600 W
4.4. Before starting the printer
Each time before starting the printer, make sure that the following conditions are met and the following actions have been
performed:
•check the conduits for abrasion or other visible defects. If the conduits are damaged, notify the 3DGence technical service
department immediately using the problem notification form at www.3dgence.com/support. Do not connect the printer
to power supply and/or make repairs on your own;
•confirm that filament is not contaminated, broken, bent or tangled on the spool;
•confirm that in the printer's working area there are no objects or remains of printouts that could cause a jam or damage
to the machine;
•check X axis and Y axis, confirm that their movements are not blocked by moving the printing module manually to the left
and to the right and by moving the heatbed manually forwards and backwards;
•confirm that the Z axis breaker (fig. 6) is not damaged, broken or bent and that it coincides with the Z axis endstop (is
aligned with the endstop notch);
•confirm that thermistors (temperature sensors) of hotends and heatbed properly. To do this, start heating the hotends
and heatbed and check that temperature indications on the LCD screen increase. A problem exists if def value is displayed;
•immediately before starting the printer, make certain that no person or undesirable object is within the printer's working
range.

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Fig. 6 1. Z axis breaker | 2. Z axis endstop - in its correct home position
II PRINTER DESCRIPTION
1. DESIGN OF PRINTER
The figures together with the descriptions of the major printer's components are presented below in order to facilitate the
operation of 3DGence DOUBLE P255 printer and make it easy to understand the instructions included in the User's Manual (fig.
7-10). Please, refer to the figures and descriptions in order to better understand the 3D printing terminology.
Fig. 7 3DGence DOUBLE P255 printer –front view.
1. Bowden tubes | 2. Filament sensor T0 | 3. Filament sensor T1
4. Spool holder T0 | 5. Spool holder T1 | 6. Printing module

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Fig. 8 3DGence DOUBLE P255 printer - front isometric projection:
7. Extruder T0 | 8. Extruder T1 | 9. Z axis endstop
10. Z axis breaker | 11. Display | 12. SD card slot
Fig. 9 3DGence DOUBLE P255 printer - front isometric projection:
13. Extruder cooling fans | 14. Trapezoid bolt | 15. Heatbed
16. Cable carrier (Y axis)

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Fig. 10 3DGence DOUBLE P255 printer - rear isometric projection:
17. Cable carrier (Z axis) | 18. Mains power supply socket
19. USB port A | 20. USB port B | 21. Printer switch
1.1. Kinematic system
The printer works in the Cartesian robot's kinematics. The dual hotend module moves along X axis (to the left - to the right).
The printer's heatbed moves along Y axis (forwards –backwards) and along Z axis (up –down). The designation of the printer
axes is shown in fig. 11. Dimensions of available printer's working space:
X: 190 mm,
Y: 255 mm,
Z: 195 mm.
Printed object must not exceed the above dimensions. The printer's software will prevent an attempt to generate a file that
exceeds the maximum dimensions, but these dimensions must be considered when designing the model for printing.
Fig. 11 Designation of 3DGence DOUBLE P255 printer axes

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1.2. Heatbed
The printer's heatbed moves along Y axis and Z axis (fig. 12). The entire heatbed is marked with a lighter colour. The darker
colour marks the actual printing area. The difference between the heatbed area and the actual printing area in X axis results
from the use of the dual hotend system. Made of ceramic plate, the heatbed guarantees good printout adhesion even for
several dozen hours of continuous operation of the printer.
Fig. 12 Heatbed of 3DGence DOUBLE P255 printer
1.3. Extruders
3DGence DOUBLE P255 printer is equipped with two material extruding systems (Bowden type extruders) (fig. 13). They are
located on the printer's top, behind the dual hotend module. Extruder T0 (Tool 0) is responsible for feeding the base material
to hotend T0, while extruder T1 (Tool 1) is responsible for feeding the supporting material to hotend T1. Tool 0 extruder is
located on the left side of the user facing the printer (fig. 13). More information on loading the materials and operation of
extruders can be found in chapter III, point 4.
Fig. 13 Extruders of 3DGence DOUBLE P255 printer 1. Extruder T1 | 2. Extruder T0

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1.4. Dual hotend module
3DGence DOUBLE P255 printer is equipped with two hotends installed in the dual hotend module (fig. 14). The module contains
the hotend change system for quick assembly and disassembly of hotends having various sizes and purposes. The module
contains also the printout cooling system. Detailed description of the module is included in chapter VI.
ATTENTION:
The dual hotend module contains moving, sharp and hot elements. Do not touch the module during printer
operation.
Fig. 14 Dual hotend module of 3DGence DOUBLE P255 printer
1.5. Printer's power supply management
The printer's main switch is located at the back of the printer (fig. 15). To start the printer, set the switch to the upper position
(ON).
Fig. 15 . Switch of 3DGence DOUBLE P255 printer - rear view

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2. SET OF PRINTER'S ACCESSORIES
3DGence DOUBLE P255 printer is delivered together with the set of consumables and the set of necessary accessories and
enclosure. The box includes:
•3DGence DOUBLE P255 printer,
•SD memory card,
•power lead,
•USB cable,
•two bowden tubes,
•two spool holders,
•Dimafix adhesive stick,
•additional accessories,
•PLA filament spool,
•BVOH filament spool.
3. USER INTERFACE
3DGence DOUBLE P255 printer is equipped with a 4.3-inch colour touch screen located on the right side of the printer's front
panel (fig. 8, point 11). This is the printer's communication interface with a transparent graphic menu. The user menu structure
changes depending on the printer working status.
The menu architecture diagram is shown in chapter II, point 3.3.
3.1. Idle state menu
After connecting the printer to power supply and starting it, the start screen is displayed to indicate that the printer is preparing
for operation (fig. 16).
Fig. 16 Start screen
Then, the display shows the printer's main menu in idle state (fig. 17).

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Fig. 17 The printer's main menu in idle state
In the lower part of the main panel there are fields containing information on temperatures and status of the printout cooling
fans (fig. 18).
Fig. 18 Control panel for temperatures and status of cooling fans
Tool 0 –temperatures for extruder 0 hotend.
preset temperature (at the top),
current temperature (at the bottom).
Tool 1 –temperatures for extruder 1 hotend:
preset temperature (at the top),
current temperature (at the bottom).
Heatbed –temperature of the printer's heatbed:
preset temperature (at the top),
current temperature (at the bottom).
Fan speed –percentage of current power of printout cooling fans.
The left panel of the idle state menu contains four function keys (fig. 19).

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Fig. 19 The left panel of the main idle state menu
PRINT –displays the screen of the SD card manager, in which the files for printing (G-code) saved on the card are
available - .gcode (fig. 20).
Fig. 20 SD card manager screen
To scroll the list of files, use the arrows on the right. A file can be selected by pressing directly on its name. The background of
the indicated file is highlighted in red. When a file is selected, the information on the printing time and demand for consumables
for the given model is available –separately for model material and support material. When the PRINT key is pressed, the
process of printing the indicated file starts.
BACK –return to main MENU.
MATERIALS - displays the screen with information and options related to loading, unloading and change of
consumables (fig. 21).
Fig. 21 MATERIALS menu screen

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The information on consumables is displayed on the right side of the screen. TOOL 0 (on the left side) is the base material
(MODEL MATERIAL), while TOOL 1 (on the right side) is the support material (SUPPORT MATERIAL).
In the example shown in fig. 21, the material for TOOL 0 is loaded (this is indicated by icon next to the material spool graphic
symbol and the material loading temperature); UNLOAD MODEL MATERIAL option is active in this case. No material is loaded
for TOOL 1 (this is indicated by icon next to the material spool graphic symbol and NO MATERIAL message) –LOAD SUPPORT
MATERIAL option is active.
Load model material / load support material –choose this option to start the material loading manager (more information
can be found in chapter III, point 4.1).
Unload model material / unload support material –choose this option to start the material unloading manager (more
information can be found in chapter III, point 4.2).
Clean nozzles –if this option is selected, a test-extrusion of filament will be performed first by TOOL 0 and then by TOOL 1.
This option is particularly useful when the user has to change the material or remove the remains of old filament or if the
hotend has not been used for a long time and is slightly clogged. The automatic hotend cleaning assistant is available during
printing and in the idle mode.
Back –return to main MENU.
TUNE - enables precise modifications of basic printing parameters (fig. 22).
Fig. 22 TUNE menu screen
Selecting a given parameter control option activates the value selection panel in the lower right corner of the screen. The value
can be modified using –/ + keys. The RESET key restores the default value.
Flow –percentage value of amount of fed material. 100% is the default amount of extruded material. The values should not
be changed by more than +/- 5%.
Speed –percentage value of printing speed. 100% is the default printing speed.
Tool 0 temp. - this key makes it possible to set any temperature for the hotend of extruder 0 within the range of 185 - 270⁰C.
Tool 1 temp. - this key makes it possible to set any temperature for the hotend of extruder 1 within the range of 185 - 270⁰C.
Heatbed temp. –this key makes it possible to set any temperature for the printer's heatbed within the range of 40-160°C.
ATTENTION: do not leave the hotends heated to high temperatures for more than 15 minutes if there is no material
flow. Otherwise, the material may degrade and block the hotend.
Fan speed -this screen enables smooth adjustment of current power of the printout cooling fans within the range of 1% -
100%.
Auto fan on/off –the option is active by default (on). If this option is deactivated (off), the setting of the fans will be in
compliance with the power set in the printer and the commands resulting from the machine code will be ignored.
Back –return to main MENU.

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MENU –activates the advanced options screen of 3DGence DOUBLE P255 printer (fig. 23).
Fig. 23 Advanced options MENU screen
Home all –referencing (setting in zero position) all 3 axes of the printer. Point X = 0, Y = 0, Z = 0 is located at the left front
corner of the printer's heatbed.
ATTENTION: do not use HOME ALL option when there is a printout or another object on the heatbed. This may cause
damage to the printer!
Activate tool 0 / Activate tool 1 –choose this option to activate the hotend the number of which is on the key.
Example: If this option is selected when the key displays "ACTIVATE TOOL 0", the TOOL 0 hotend will be set in active position
and the key will display "ACTIVATE TOOL 1".
Retract –activates the material withdrawal movement. This option applies only to the hotend in active position and can be
activated only after the hotend has reached the minimum operating temperature.
Extrude –activates the material extrusion movement. This option applies only to the hotend in active position and can be
activated only after the hotend has reached the minimum operating temperature.
Rise heatbed –press and hold the key to move the heatbed smoothly up. Press the key once to move the heatbed at a short
distance.activates. The upward movement is limited by the Z axis endstop. If T1 hotend is active, first the hotend will be
changed to T0.
Lower heatbed –press and hold the keys to move the heatbed smoothly down. Press the key once to move the heatbed at a
short distance.
ATTENTION: the heatbed downward movement by means of LOWER HEATBED option is unlimited! Take special care
when using this option to prevent the collision of the heatbed with the printer's lower plate.
Settings –used for basic configuration of 3DGence DOUBLE P255 printer (fig. 24).
Fig. 24 SETTINGS menu screen
Sleep ON/OFF –settings of the printer's sleep mode. The time, set with the +/- buttons, determines the period of inactivity
after which the printer will go into the sleep mode. To switch off the sleep mode option, press "OFF" key. In the sleep mode,
the reduced power consumption mode is active and the working lights are off.