Does the 1.1.9 firmware do linear advance on the Mini 2?

General Software
1

Since the Marlin 1.1.9 release contains support for linear advance, I am curious if the new firmware does linear advance. I have heard it is enabled, but not activated. I am not sure what that means exactly.

So for the Mini 2 running 1.1.9, is the firmware doing linear advance?

Thanks
Monty

2

Oh also, DO NOT run the new Cura 3.2.27 sliced gcode on a Mini 2 with the old 1.1.8.x firmware. It smashes the print head into the bed for the first layer.

Thanks
Monty

3

In order to activate the linear advance, you will need to add an M900 K<float_value> to your start gcode. It is a little more advanced to get that tuned in for your specific filament, but the results look quite promising: http://marlinfw.org/docs/features/lin_advance.html

This is something we are working on, and hope to have a more point and click solution for customers in the future. You can follow along with our progress here: https://code.alephobjects.com/T2849

4

Thanks for the reply. Linear advance could be great, unfortunately, K is specific to filament used, so we’d need support for that for the Lulzbot supported filaments. Lots of work. However I thought the K value was related to filament expansion when heated or something, so maybe it will become something filament manufacturers print on the label along with temperature etc.

5

Indeed, it is going to be quite an undertaking with our hundreds of supported profiles. As we have not done much testing as of yet, the K factor may be dependent upon the different quality settings as well.

I surely hope so, it would save a lot of headaches!