FAQ-Geeetech A20

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FAQ-Geeetech A20

Post by Admin » Tue Nov 13, 2018 4:44 pm

Motor
1.Direction of motor:
How to change the motor direction in firmware?


2.Motor works abnomral
Motor’s non-action
http://www.geeetech.com/forum/viewtopic ... 17&t=17038
Check the endstop of the printer
viewtopic.php?f=17&t=60927

Drivers
Check the USB serial chip at first then :
http://www.geeetech.com/forum/viewtopic ... 974#p81974

Cura Profile
Geeetech A20 Printer
http://www.geeetech.com/forum/viewtopic ... 07&t=68463
Extruder
1.Extruder
Extruder does not work normally.

2.Nozzle type
The nozzle type of A20 is m6 thread;
Hotend-s.png
Hotend-s.png (23.55 KiB) Viewed 2235 times
The nozzle type of A20M is m7;

3.Hotend clean and nozzle replce
https://www.youtube.com/watch?v=evslMa5Jpc8&t=56s

Heatbed
1.Note:
If the heat bed won't heat,you can remove the clamps from the four corners of the heat bed

2.The heatbed thermistor datesheet
http://www.geeetech.com/forum/viewtopic ... 51&t=62055

PID tuning
Tuning refers to the parameters adjustment of a proportional-integral-derivative control algorithm used in most repraps for hot ends and heated beds.

PID needs to have a P, I and D value defined to control the nozzle temperature. If the temperature ramps up quickly and slows as it approaches the target temperature, or if it swings by a few degrees either side of the target temperature, then the values are incorrect.


https://reprap.org/wiki/PID_Tuning

Source
Schematics

Schematic for the new version Mainboard: GT2560 V3.0

The wires of GT2560 V3.0
GT2560V3 wires.png
GT2560V3 wires.png (2.69 MiB) Viewed 2454 times
Level
1.Video for 3Dtouch/Bltouch on Geeetech A20/A20M
You need to refer to this video(It is for A10/A10M but it is suit for A20/A20M) upload the firmware to it and adjust it
https://www.youtube.com/watch?v=_RtsZDbR2po&t=59s




Where to find the firmware and how to install it?
You need to upload the firmware via Arduino IDE 1.8.5(Use the 1.8.7 or higher version may cause the motor work abnormal)
http://www.geeetech.com/forum/viewtopic ... 20&t=17046
http://www.geeetech.com/forum/viewtopic ... 20&t=17181

2.For the Marlin2.x firmware(unofficial) Author:vert
http://www.geeetech.com/forum/viewtopic ... 98&t=68228

Cooling fan:
How to fixed the PWM fan problem?

Updating.....

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