Print settings update with Linear Advance.
I am a bit confused with this!
I have been playing around with various speeds, infills etc., but the latest FW3.1.0 WITH LINEAR ADVANCE AND DRIVERS 1.9.1, says that In the new drivers 1.9.1, basic linear advance is already preset so you don’t have to. This applies to both Slic3r PE and PrusaControl.
So, what does this mean exactly? Do I just need to place the M900 K### in the custom Gcode and that is it, or what?
Re: Print settings update with Linear Advance.
Linear Advance is included in the firmware. But it is depending on a factor, the K factor.
By default K=0. If you don't enter M900 to set a K value for your print, K=0 and the print is as with previous firmware.
You would set a K value which depend mostly on the material. The dumb settings are K=30 for PLA and ABS, K=45 for PET. Then add M900 K30 in the gcode section of your PLA settings. The slic3r Prusa material settings were updated with 1.9.1.
For now, I find the dumb K value good enough. But if you want to tune your K value: https://mattshub.com/2017/10/02/linear-advance/
Re: Print settings update with Linear Advance.
I find it really confusing.
I have the MultiMaterial upgrade and these settings are missing in the custom G-code section of MM Slic3r, they are however present in the normal single mode Slic3r.
Since there are different settings required for Multimaterial or single mode, I don't feel it's smart to just copy some settings over.
Why hasn't this been updated in the multimaterial version of Slic3r? Its all very confusing.
Re: Print settings update with Linear Advance.
Since the MK2MM uses Bowden drives instead of direct drive, the K values are drastically different. The K value is effectively a spring constant; think of it as how far you have to compress the filament to resist a given force. The way K is used in the code, smaller values mean stronger springs. With a direct drive, the filament path from driver gear to hot end is short; it doesn’t take much compression to resist a strong force => small K value. For
Bowden drives, the path is much longer and results in a much weaker spring. (If you compress a long filament the same absolute amount as a short filament, there is a lot more material to absorb the stress so it will not push back very hard.) => much larger K values. I’m closing in on K=450 for PLA on my MK2MM. I hope clears things up a little.
Re: Print settings update with Linear Advance.
That still doesn't explain why they didn't provide defaults
Re: Print settings update with Linear Advance.
That still doesn't explain why they didn't provide defaults
They did. If you load the latest Slic3r setting in the new release, the M900 Kxxx is in the start gcode and is correct for MMU or MK2.
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