Alfawise U20 printer displays "Print finished" although it never started to print !

[gsparis]

Hello everyone,

I have an Alfawise U20 that is said to be a Creality CR10 clone and has a Marlin type firmware.
I was using Cura 3.4.1 and had been able to print this part https://www.thingiverse.com/thing:2047554 with no problem but I wanted to print it with Simplify 3D 4.0 I just bought.

I chose the Creality CR10 profile (as there is no specific profile for the Alfawise U20) and imported the STL file of the above part, prepared it to print and generated the g-code file on an SD card.

I then put the SD card on the U20 printer, selected the g-code file generated above and started to print but immediately after, the printer displays "Print finished".

Here's the start of the g-code file as generated by S3D just before the "; process Process1" line:

Code: Select all

M82
M106 S0
M140 S20
M190 S20
M104 S200 T0
M109 S200 T0
G28 ; home all axes
G1 Z5 F3000 ; lift
G1 X5 Y10 F1500 ; move to prime
G1 Z0.2 F3000 ; get ready to prime
G92 E0 ; reset extrusion distance
G1 Y80 E10 F600 ; prime nozzle
G1 Y100 F5000 ; quick wipe
G92 E0
G1 E-5.0000 F1800
G1 Z0.240 F1000

G90

Now the ending part of the g-code:

Code: Select all

G28 X0 ; home x axis
M106 S0 ; turn off cooling fan
M104 S0 ; turn off extruder
M140 S0 ; turn off bed
M84 ; disable motors

G90

My computer and the printer aren't in the same room so I can't directly print in USB and need to print through an SD card.

Could anyone help me out ?


Gilles

[Ayres3D]

I assume that the print preview shows a valid print, does it? Many a time I have forgotten to clear the "Start print at .." height meaning that there was nothing to print.

[dkightley]

Two questions....

Have you contacted SImplify3D's support to ask if they have a profile they know works??

Have you compared the GCODE files produced by S3D and Cura to see if there are any glaring differences in the lines at the start and end of the print?

If there are no other U20 users on the forum, the latter may be the best thing to do.

[gsparis]

Hi,

Thanks for you reply !

Yes, the preview displays with no error !
I saved the g-code file on SD card.

The starting and ending g-code of the file I want to print are those listed in my first post.
From what I saw of it, it should print at the start.


Gilles

[S3D-Jake]

Gilles,

Can you attach your whole g-code rather than just the start and end scripts? As Doug said, a file that printed correctly for comparison would be a great place to start troubleshooting the file not printing anything.

[gsparis]

Hi Doug,

Thanks for you reply !

I did contact Simplify 3D's support with the same post 3 or 4 days ago but so far, no reply whatsoever !

Yes, I compared both the starting and ending codes of Simplify 3D and Cura and they differ a bit but Simplify 3D has a profile for the Creality cr-10 and as far as I know, beside the Alfawise being a clone of it, the base firmware should be the same (Marlin).
That's what I thought but the fact the U20 immediately thinks the printing is over might show some incompatibilities with some g-code.

The Cura starting code is as below:

Code: Select all

M190 S60
M104 S204
M109 S204
M82 ;absolute extrusion mode
G21 ;metric values
G90 ;absolute positioning
G28 X0 Y0 ;home X/Y
G28 Z0 ;home Z
G1 Z15.0 F4200 ;move platform down 15mm
G92 E0 ;zero extruder
G1 F200 E3 ;extrude 3mm
G92 E0
G1 F1500 E-7

The S3D starting code is as below:

Code: Select all

G90
M82
M106 S0
M140 S0
M104 S200 T0
M109 S200 T0
G28 ; home all axes
G92 E0
G1 E-1.0000 F1800
G1 Z0.090 F1000

There are some differences but nothing that should make the printer behave like this.


Gilles

[gsparis]

Hi Jake,

Thanks for helping !

Please find the 2 files attached.

The_Ultimate_Spool_Holder_v2_S3D_KO.gcode

The S3D file that doesn't work !

(1.02 MiB) Downloaded 221 times

The_Ultimate_Spool_Holder_v2_Cura_OK.gcode

The Cura file that does work !

(1.86 MiB) Downloaded 235 times

Gilles

[gsparis]

Hi everyone,

I finally found out what the problem was !

The Micro SD card that was included with the printer and on which I copied the g-code files was the problem.
To be more precise, files that I added on it couldn't be read correctly by the printer but those already on it when I received it worked correctly.

I solved the problem by reformatting the Micro SD card and copy the files back on it.

I then had no problem to print files previously edited with and modified by Simplify 3D.

Thanks again for your time guys !


Gilles

[boomboom907]

sorry, I could have told you the same thing without needing the code. i just had the exact same problem. 10 dollar fix