Slic3r - placeholder for total number of layers

Hi again,

Thanks for forum's help with the code. We love using Slic3r for SLA printing. We are looking for a way to tag the total number of layers in the gcode. We couldn't find a placeholder for that or a proxy that we can use to calculate.
We were able to use [layer_num] to find current layer number.

Anything help is greatly appreciated.

On the 'Printer Settings' menu, under 'Custom G-code' you can have Slic3r insert a gcode either before, or after, or both, a layer change. I have Slic3r insert M117 'Before layer change', then have Slic3r run a python script (post processing) and count the number of 'M117' and then rewrite the gcode file with 'M117 Layer x of nn'. The M117 will display the layer message on a screen attached to the printer and/or on an Octoprint screen (I use Octoprint on Raspberry Pi's).

Could you share the Python script?

Sure, I translated it from a perl script I found on the internet (trying to keep all my scripts in one flavor). On the 'Output settings' tab, insert your directory location and full script name in the 'Post-processing scripts' box. Slic3r will run the script after it outputs the g-code.

Thanks.

thanks for your help. will try that