New printer : BCN3D Sigma

[mr_cg]

I also own the BCN3D Sigma and i would be interested in using simplify3d.
Can someone share his experience using S3D with the Sigma?

Espcially for dual printing ... are the results better than using the BCN3D Cura version?
Pro an con would be interesting.
Thanks

[Zorgonaute84]

Pro :
- All the standards Simplify 3D features...
- The profile settings management (easy to save and share settings)
- Dual extrusion used for support (dedicated head) with amazing parameters to improve the quality of the surface (specially with PVA)

Cons :
- The price !
- The feeding gestion of the 2nd extruder for the first layer.

[denisvic]

Thank you very much Zorgonaute84 for your work with S3D and sigma printer.

What's feeding problem with second extruder?

[Zorgonaute84]

The problem with the second extruder is on the pre-extrusion process.


With the BCN3D Cura version, the dual print process is :

Tool 2 extrude 10mm
Tool 2 retract 10mm
changing tool
Tool 1 extrude 10mm
Tool 1 start to print...
changing tool
Tool 2 extrude 10mm (the same quantity as retracted before)
Tool 2 start to print.

then it's continue with the normal process (T1 Extrude, T1 Print, T1 Retract, T2 Extrude, T2 Print, T2 Retract ...)
And this process is working fine !


The S3D dual print process is :

Run the custom script you want
(in my case :
Tool 2 Extrude 10mm
changing tool
Tool 1 Extrude 10mm)
Tool 1 print
Tool 1 retract
changing tool
Tool 2 Print
Tool 2 retract

then it's continue with the normal process as the Cura version.

The probleme with the Tool 2 is in my startup script I can't perform a retraction to minimize the oozing, because when the printing of the 2nd tool start for real, it do not perform any extrusion according this retraction. So during the 1st tool is printing, the 2nd tool is oozing a lot... So when it's time for this tool to print, the nozzle is not fully primed. There is not incidence on the part, because of the prime tower wich compensate trouble. But, the first layer of the primer tower is not perfect, and some time the prime tower was detached and failed my print.

[mr_cg]

@ Zorgonaute84
Many thanks for sharing your experience. It's really very useful.

Three more questions:
1. To overcome the different retract/change_tool/extrude behaviour it should be possible to add extrude_10mm manually after the 1st T1 command???
2. Is it possible to configure S3D for IDEX (dual) printing it a way that noozle is not crossing perimeters (only 1x to enter and 1x to leave)? All the travel moves should be done in the infill AND the slicer should consider perimeter from both colors.
3. How wipe&prime tower is done in S3D compared to Cura?

Thanks

[Zorgonaute84]

1/ Yes (that what I do) but it's not enough. Because if the 1st layer of your 1st head is too long to be printed, the 2nd head is oozing and the 1st layer of the prime tower printed by the 2nd head is not well printed. The result is the high risk to see you prime tower fall down durring the print.

2/ I didn't find this option, but I havn't troubles with that. The bed is go down a little durring the tools changing process.

3/ I didn't noticed any difference between S3D and Cura on this point. Except in S3D the possibility to set where you want to print the tower and which extruder you want to prime (or both)

[mr_cg]

With bcn3d cura i have lot of issues in dual printing with the prime to the box feature before moving to the wipe&prime tower.
The primed filament does not get cleaned from the rubber at the prime box. The "waste" get's taken along and is falling down later to the print.
My dual prints are looking much different - in terms of quality - to the one on youtube.
I hope it's just a matter of optimized setting???

Is this something what is going better with S3D?

[denisvic]

With bcn3d cura i have lot of issues in dual printing with the prime to the box feature before moving to the wipe&prime tower.
The primed filament does not get cleaned from the rubber at the prime box. The "waste" get's taken along and is falling down later to the print.
My dual prints are looking much different - in terms of quality - to the one on youtube.
I hope it's just a matter of optimized setting???

Is this something what is going better with S3D?

I had same issue. Guys at factory gave me some rubber supports to give some strenghtness to rubber.

Maybe you can ask them for STL

[Zorgonaute84]

The Best advice I can give you about dual color printing is to not used the Colorfila PLA provide by BCN3D. This poor PLA cause a lot of stringling. And if you really want to test with it, do not used the BCND settings... My advice is to print the Colorfila at 200C.

[denisvic]

The Best advice I can give you about dual color printing is to not used the Colorfila PLA provide by BCN3D. This poor PLA cause a lot of stringling. And if you really want to test with it, do not used the BCND settings... My advice is to print the Colorfila at 200C.

What's your advice: colorfabb ? I'm trying Ngen with your settings, it seems good...