Geeetech A20M User manual

1
SHENZHEN GETECH TECHNOLOGY CO., LTD
Geeetech A20M 3D Printer
User Manual (V2.0)

2
SHENZHEN GETECH TECHNOLOGY CO., LTD
Content
1 Attention ................................................................................................................................3
1.1 Safety instructions.......................................................................................................3
1.2 Factory test before delivery ........................................................................................3
2 Printer display ........................................................................................................................4
3 Assembling .............................................................................................................................8
3.1 Assembling the main frame ........................................................................................8
3.2 Wire connection........................................................................................................10
3.3 Check the power input mode....................................................................................13
3.4 Check the filament ....................................................................................................14
4 First print..............................................................................................................................16
4.1 Level the print bed ....................................................................................................16
4.2 SD card printing.........................................................................................................18
5 Introduction to the LCD menu..............................................................................................21
5.1 Tree diagram..............................................................................................................21
5.2 Main functions ..........................................................................................................22
6 Software setting ...................................................................................................................31
6.1 Install driver...............................................................................................................31
6.2 Install slicing software ...............................................................................................33
6.3 USB printing ..............................................................................................................41
6.4 SD card printing.........................................................................................................46
7 Color Mixer...........................................................................................................................47
7.1 Download ..................................................................................................................47
7.2 Introduction ..............................................................................................................47
8 Function introduction...........................................................................................................53
8.1 Power loss-resuming capability.................................................................................53
8.2 Reset button..............................................................................................................53
8.3 Filament run-out sensor (Optional) ..........................................................................54
8.4 3D touch for auto bed leveling (Optional).................................................................55
9 Parameters ...........................................................................................................................56
10 Contact ...............................................................................................................................57
11 FAQ (Frequently Asked Questions).....................................................................................58
11.1 Abnormal extrusion.................................................................................................58
11.2 The gear of the extruder skips and makes an abnormal noise ...............................58
11.3 First layer abnormal ................................................................................................58
11.4 Layer shift................................................................................................................58
11.5 Print stopped...........................................................................................................59
12 Declaration.........................................................................................................................59
12.1 Terms.......................................................................................................................59
12.2 Disclaimers ..............................................................................................................59

3
SHENZHEN GETECH TECHNOLOGY CO., LTD
1 Attention
1.1 Safety instructions
Please switch to the correct local voltage (110V-220V) before turning on the printer. Be sure
the switch is in the correct position or it will damage the power supply unit (PSU).
Be sure all wires are correctly connected before turning on the printer.
Don’t touch the extruder head or hot bed when printing as they generate high temperature
which may cause burn.
Don’t leave the printer unattended when printing.
1.2 Factory test before delivery
In order to ensure the quality, each printer is tested in the factory before delivery. As a result,
there may be residue in the extruder head or on the hot bed, but it should not affect normal use.
We provide the spare nozzle in the accessory kit just in case.

4
SHENZHEN GETECH TECHNOLOGY CO., LTD
2 Printer display
(Picture 2-1)

5
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 2-2)

6
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 2-3)

7
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 2-4)
1. Gantry frame
2. LCD12864 screen
3. Knob
4. Reset button
5. Y axis
6. Base
7. Z axis end stop
8. X axis end stop
9. Filament spool holder
10. Teflon tube
11. Extruder head
12. Hot bed
13. X axis motor
14. Z axis motor
15. Y axis motor
16. PSU switch
17. Y axis end stop
18. Extruder (2 sets)
19. Extruder wire connector
20. USB port
21. Power switch
22. Power socket
23. SD card slot

8
SHENZHEN GETECH TECHNOLOGY CO., LTD
Please check the accessories first when you’ve received the printer (Refer to picture 2-5). If
missing any spare part, please contact your sales representative.
(Picture 2-5)
3 Assembling
3.1 Assembling the main frame
The main frame consists of the gantry frame and the base, extruders, spool holder, and screws.
See picture (3-1).

9
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 3-1)
Assemble the gantry frame and base from bottom to top with 4 M5x35 screws and 4 M5
spring washers. See picture (3-2).
(Picture 3-2)
Assemble and fix the two sets of extruder units to the back side of the top gantry as shown
in picture (3-3).

10
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 3-3)
Fix the spool holders to the top gantry with 2 M3x6 screws and 2 M3 T-shape nuts. Details
see picture (3-4).
(Picture 3-4)
3.2 Wire connection
Insert the two Teflon tubes into the quick-insert connector of the two extruders respectively.
Details see picture (3-5).

11
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 3-5)
Plug the extruder cables into the molex socket of the extruder head extension board firmly.
See picture (3-6).
(Picture 3-6)
Connect the motor wires of E0 and E1. See picture (3-7).
(Picture 3-7)
Connect the wires of X axis’ motor and end stop. See picture (3-8).

12
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 3-8)
Connect the wires of Y axis’ motor and end stop. See picture (3-9).
(Picture 3-9)
Connect the wires of Z axis’ motor and end stop. See picture (3-10).

13
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 3-10)
3.3 Check the power input mode
The factory default voltage is 220V. You need to choose the correct voltage according to your
local standard requirement. See picture (3-11)
Note: Be sure the voltage is switched to the correct one.
(Picture 3-11)

14
SHENZHEN GETECH TECHNOLOGY CO., LTD
3.4 Check the filament
Put the filament on the spool holder. Please pay attention to the feeding direction of the filament.
See picture (3-12).
(Picture 3-12)
Since the filament is bent, the first section of it needs to be straightened by hand and trimmed to
make it easier to insert the filament into the feeder. Press down the lever handle of the extruder
and insert the filament into the feeding tube until it reaches the extruder head. See picture
(3-13).

15
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 3-13)
When print PLA, set the target nozzle temperature about 180-210℃. When the temp is stable,
control the extruder filament feeding on LCD screen (“Move axis”), feed until there is molten
material flowing from the nozzle.
Observe the nozzle, if there is no filament stuck and the filament is coming out smoothly, then
stop filament feeding, clear the nozzle with tweezers. See picture (3-14).
(Picture 3-14)

16
SHENZHEN GETECH TECHNOLOGY CO., LTD
4 First print
4.1 Level the print bed
The first layer is key to a successfully printed model. The factory default setting is a little high in
order to avoid scratching the hotbed with the nozzle, so users need to adjust the distance
between nozzle and hotbed again. After the first-time bed leveling, users may need to level the
bed again in future.
Rough leveling
Home the printer first (Prepare> Auto home), then it shows the option “Level corners” on the
LCD screen. Put a piece of A4 paper on the platform, click “Next corner”, the extruder head
moves counterclockwise from the bottom left corner to the four corners of the platform. See
picture (4-1, and 4-2).
(Picture 4-1)
(Picture 4-2)
When the extruder head moves to the left bottom, adjust the corresponding knob until the
distance between the nozzle and bed is about the thickness of a piece of paper (about
0.1-0.2mm). Slide the paper back and forth to see if you feel a slight resistance. If yes, it means
the leveling of this corner is finished and you can proceed to level the rest corners with the same
method. See picture (4-3).

17
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 4-3)
Accurate leveling
If you level the bed with A4 paper, the first layer maybe too high, too low or moderate.
a. Too high: the distance between the nozzle and bed is too far, which may cause the filament to
not stick or not stick well. See picture (4-4).
(Picture 4-4)
b. Too low: the distance between the nozzle and the bed is too close, which prevents the filament
from coming out and causes the extruder gear to click, and even worse, scratch the nozzle on the
bed. See picture (4-5).
(Picture 4-5)
c. Moderate: Extrude the filament properly and evenly stick on the bed. See picture (4-6).
(Picture 4-6)
In the case of too low and too high, adjust the knobs under the platform till they are moderate. It
may take some trial and error to achieve the best result. An example of good first layer, see
picture (4-7).

18
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 4-7)
Note:
If turn the knobs clockwise, the platform will rise, and vice versa.
Avoid the nozzle touching the bed; use a piece of A4 paper. Or it will scratch the bed.
For more details, please refer to this link:
http://geeetech.com/forum/viewtopic.php?f=112&t=62296
4.2 SD card printing
Insert the SD card into the slot. See picture (4-8).
(Picture 4-8)
Press and rotate the knob to enter the main menu. Select the option of "Print from SD". See
picture (4-9).

19
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 4-9)
Choose the files in the SD card. See picture (4-10).
(Picture 4-10)
The printer will heat automatically. See picture (4-11).
(Picture 4-11)
When heating done, the printer will start printing. See picture (4-12, 4-13).

20
SHENZHEN GETECH TECHNOLOGY CO., LTD
(Picture 4-12)
(Picture 4-13)