Best posts made by 3Dreamer

Hi all,
from some G2/G3 command tests conducted on my machine I noticed that vector printing produce smoother movements and material deposition, leading also to a better surface finish or permitting higher print speeds.

G2/G3 Controlled Arc Move commands are already implemented in the firmware, so I'm here to ask you if there is the possibility to implement also the G5 command for Bézier curves interpretation.

In my opinion it's a good idea to let the machine reach its real print resolution for curved movements, bypassing traditional G1 "pre-segmentation".

Thank you!

@engikeneer
Hi all and thanks for your kind replies!

I'm sorry, I didn't explain myself well: I've been using print-tailored probing grid for a long time, ex. using, in PrusaSlicer, the instruction:

M557 X[first_layer_print_min_0]:[first_layer_print_max_0] Y[first_layer_print_min_1]:[first_layer_print_max_1] Px:y

What I really meant is about probing points that follow the nozzle path of the first layer! While printing a ribbon-like spiral you will obtain, for example, a spiral probe map!

Thank you Bearer and Dougal1957 for your answers,

@bearer said in Vector printing (G2/G3/G5):

Are there slicers that output g-code that isn't segmented? I'm sure the firmware will evolve as we at some point move away from .stl as the intermediate step that remove all curves.

Slicers are waiting for Firmwares and Firmwares are waiting for Slicers. Meanwhile FDM print software stagnate and machines are used well under their true capabilities.

Anyway, Marlin firmware already support G5 commands (as experimental feature), while there are some pieces of software on GitHub that try to re-convert G1 movements into G2/G3 true arcs.

Also consider that there are so much people that experiment with their printer and that do not alway use slicers to produce GCode. Sometimes I also use some self hand-coded softwares to generate the desired GCode commands.

While we wait for overtaking STL it would be nice to let experimenters use their hardware at it's maximum capabilities

@Dougal1957 said in Vector printing (G2/G3/G5):

@bearer it is slated to be in KissSlicer V2 Premium in the very near future just as it will also support direct input of IGES and STEP Files

Kiss

As I know there is no guarantee that vector IGES/STEP informations will be translated into G2/G3/G5 instead of G1 commands, and I have very little hope by reading this page: http://www.kisslicer.com/premium-version.html

Thank you!

@bearer Yes, it is clear, you are right.
Anyway not everyone is an expert programmer, so I think it is legit to kindly ask/suggest for this kind of firmware additions, and this is the main goal of this thread.

I hope that someone into Duet/RepRap firmware development will be able to listen to my suggestion, or point me towards some partial actual solution.

Thank you!

Hi dc42,
just checking to see if there's any news on G5 implementation

Thank you!

@infiniteloop said in Mesh bed leveling - STL based probe points:

Of course, we have to make sure that the bed is levelled properly before we apply the mesh - it’s a misuse to take the grid as a means to get rid of levelling the bed.

Sometimes, while the bed is properly levelled, there are still local roughness that can't be properly mapped by a grid, so why G29 can't it mov adapt the Z height in those points?
Imagine printing on substrates like wooden boards, fabrics, wavy surfaces, eg.

Hi @dc42,
is there any chance to see "G5 Bezier curves" implementation in the forthcoming period?
We are almost ready with our experimental slicing software, so it would be nice to test it on our machine ,-)

Thanks you so much for your work!