Percentage printed?

[ginobrancazio 0]

Ultimaker Original+ using Cura and Marlin

While I'm printing from SD the screen displays the progress of the print as a percentage (%)

How does Marlin calculate this percentage? Is it:

 

• Percentage of the time printed vs estimated time to complete
  
• Percentage of height printed vs final print height
  
• Percentage of filament extruded vs final extrusion total?
  

Or something else entirely?

Thanks for the help,

Gino.

 

[amedee 349]

It is the "percentage of the GCode printed"

Actually the percentage of the file size printed so far. So if the file is 2MB and and you have printed 512K, it will say 25%

 

[ginobrancazio 0]

Gotcha! Any way to estimate how much of the filesize is attributable to parts of the model? Or is it anyone's guess?

 

[lars86 42]

It is the "percentage of the GCode printed"

Actually the percentage of the file size printed so far. So if the file is 2MB and and you have printed 512K, it will say 25%

Are you sure about that?

To me, it has always seemed like it read out current layer / total layers in percent.

[amedee 349]

Are you sure about that?

 

Read the code...

 

To me, it has always seemed like it read out current layer / total layers in percent.

Marlin doesn't know anything about layers...

[jonnybischof 60]

The GCode file contains layer information. Marlin would "simply" need to read through the full gcode file before starting the print, in order to find the amount of layers.

Then, it would have to read the "layer: xx" information instead of just skipping it (because it's a comment line).

It's not as easy as in "you can write that code in 5 minutes" (programming always takes it's time..), but should be doable without problems.

[amedee 349]

Not as simple as that...

"# Layer xx" is as you say a comment, it is what Cura does, but there is no guarantee that it will be there if you are using another slicer. So you have to look at the Z movements to make up you mind.

And also, layer is not necessarily a good representation of time, depending on the complexity. Some layers take much more time...

So after all, looking at the percentage of GCode actually printed is definitely not a bad option and in my view much better than number of layers.

[lars86 42]

And also, layer is not necessarily a good representation of time, depending on the complexity. Some layers take much more time...

Agreed. I didn't ever think that was a good idea. I've never found the percentage displayed to be exceedingly accurate though. Especially when a print starts large and narrows at the top.