Geeetech

Posted: **Tue Nov 26, 2019 1:23 am**

Hello everyone,

Here I have an a20m (replacement of my u20) recently with bltouch, first impression with the test file of the card sd ok the first time, but since impossible to launch something else slicer on s3d or cura, even the test files will not launch more. I flash the firmware with that of geeteech again, redo the setting of the technical offset with differents methods. (edit: flashed in marlin 2.0 or 1.1.x)

It makes a home then preheated but after nothing, the temp of the extruder does not stabilize (between 205 and 212) temp asked 210. I'm scratching my head since 3 days. It starts to run if I turn on autotemp only and change the value to put a value between 200 and 215 but stop and change the time values to 0, if it is a double extrude.

if anyone has an idea of the reason, I'm interested.

Thank you in advance !
Sorry for my english I'm a french user.

I presume that the problem is not that of the start gcode but it is still:

Code: Select all

M107 ; ALL FAN OFF
M117 Preheating... 
M140 S[first_layer_bed_temperature]  ; and continue
M109 S150      ; partial hotend temp and wait
;----------------------------------------
M117 Auto leveling;
;M420 S1
G29 V3; run auto level
;----------------------------------------
M117 full heating... 
M104 S[first_layer_temperature]      ; set final hotend temp and continue
G28                                  ; go to HOME
G1 X12 Y5 Z1 F300
G1 X12 Y5 Z0 F300           ; stop leaking hotend
M109 S[first_layer_temperature]      ; final hotend temp and wait for it
M190 S[first_layer_bed_temperature]  ; and wait for it
;----------------------------------------
M117 Priming
M300 S500 P200  ; beep

G90                                  ; absolute position
G21                                  ; milimeters
G92 E0                               ; position E0
M83                                  ; 
G1 Z0.4 F1000.0                      ; 
G1 X12.0 Y5.0 F1000.0
G1 Y68.0 E15.0 F1000.0
G1 Y115.0 E22 F1000.0
G1 E-7 F2400  ;retract the filament a bit before lifting the nozzle  to release some of the pressure
G1 Z0.5 F1000.0                      ; 
M82
G92 E0
M117 Printing...
M900 K240

Posted: **Tue Nov 26, 2019 9:36 am**

Hi, You can check if the thermistor on your hot end is fully connected,
Or try changing the PID, you can refer to this: https://reprap.org/wiki/PID_Tuning

If this happens on the SD card, you can try to replace the SD card to try;
If you connect the printer to the slicing software through USB,
or you can only heat but cannot print, it may be a problem with the motherboard.

Posted: **Thu Nov 28, 2019 4:34 am**

Hi, Thank you William.

I have check the thermistor connection, it correctly connected.
It happens with sd card and USB connection, i try with CURA and S3D
I have Autotune the PID four time with C8 value.

I can print only if after heating I change manually my temp value lower than the M109 value with an M104 command. I don' understand, it's like the command M109 is blocked whatever if the extruder temp is reached.

It probably an other problem but i have upgrade with A20M marlin 2.0 bugfix and the printer didn't move correctly, whatever if it the same value of the 1.1.0 (the Z endstop didn't work but i active the X Y Z endstop in the configuration.h I have downgrade to origine firmware, for resolve the heating problem.

Edit 1: I have try with M104 at 210 and after an M109 at 205, in the start gcode. My print make an error " Heating Failed / Printer Halted / Please reset"
Edit 2: I try another time after 25min of extruder preheating,

it print my test.gcode ( an center target ) After printing i try an second time and the error appearing again...

Posted: **Thu Nov 28, 2019 9:14 am**

Hi， You can try the firmware on the official website: https://www.geeetech.com/download.html?download_id=33
If the heating error still occurs, you need to measure the thermistor on the hot side.

Posted: **Thu Nov 28, 2019 9:30 pm**

Hi,

I try the firmware on the official website, i can up the firmware G04 but not the G05 ( objet error ). The heating error is a random error. I send an email at geeetech.

Wait and see for solving the problem.

I will give the answer of geeetech here...if it can help someone else...

Posted: **Fri Nov 29, 2019 9:16 am**

Hi,does the temperature error still appear when you update G04?

Posted: **Fri Nov 29, 2019 5:24 pm**

Hi,

After the update i make only 4 preheating test, and no error appeared. I will try today another preheating test in order to watch if the error occur again.

But another question,i don't understand, when I upgrade with the firmware tool, it has an error with the G05 (bltouch) hex file and not on G04 (bltouch). And the most important question when i upgrade with arduino method ( normally the same firware ) i have some error ( home center isn't the same, heating error, sometime endstop error ) but normally the firware is the same

? ( in the future, i would like to add tmc2208, and if i can't upgrade without arduino method (heating error) i will not able to configure tmc2208 )

Geeetech

A20m Preheating and only wait...

A20m Preheating and only wait...

Re: A20m Preheating and only wait...

Re: A20m Preheating and only wait...

Re: A20m Preheating and only wait...

Re: A20m Preheating and only wait...

Re: A20m Preheating and only wait...

Re: A20m Preheating and only wait...