Lin Advance setup
Hello, I am looking into linear advance and I am just interested in figuring out what information is relevant here in late 2019.
1. To enable linear advance we much change "USE_ADVANCE" to 1 and it is no longer recommended to use "ENABLE_QUADRATIC_ADVANCE" (1, leave at 0), is this correct?
2. Possibly a stupid question, but I've seen K referred to as quadratic. Is it bound/related to the "quadratic advance" shown in the question above? If so, going under the assumption quadratic advance is not recommended. Is the
3. The way to calibrate linear advance is to use this calibrator, download the g-code and use 'find & replace' to change all "M900 K" with "M233 X" or "M233 Y"
-Sub question, the X and Y in M233 has nothing to do with the axis X and Y, am i correct?
4. Marlin apparently has deprecated the L value and now seem exclusively use the K value, thus removing a lot of the now irrelevant information about calibrating the L value linked from this forum. Is it still recommended running the calibrator with the L value or is the K value a better choice?
5. Is repetier linear advance comparable to Marlin's V1 or V1.5? Which does one pick in the calibrator (point 2)? Is "M233 Y" still relevant or is it "M233 X"
6. I have seen @Repetier several times mentioning that an L value of 40 is a good starting point for direct drive setups. Is this in combination with a calibrated K value or is it a good starting point for running the calibrator (for example running M233 Y, test with the values 40-80 or something)
1. To enable linear advance we much change "USE_ADVANCE" to 1 and it is no longer recommended to use "ENABLE_QUADRATIC_ADVANCE" (1, leave at 0), is this correct?
2. Possibly a stupid question, but I've seen K referred to as quadratic. Is it bound/related to the "quadratic advance" shown in the question above? If so, going under the assumption quadratic advance is not recommended. Is the
3. The way to calibrate linear advance is to use this calibrator, download the g-code and use 'find & replace' to change all "M900 K" with "M233 X" or "M233 Y"
-Sub question, the X and Y in M233 has nothing to do with the axis X and Y, am i correct?
4. Marlin apparently has deprecated the L value and now seem exclusively use the K value, thus removing a lot of the now irrelevant information about calibrating the L value linked from this forum. Is it still recommended running the calibrator with the L value or is the K value a better choice?
5. Is repetier linear advance comparable to Marlin's V1 or V1.5? Which does one pick in the calibrator (point 2)? Is "M233 Y" still relevant or is it "M233 X"
6. I have seen @Repetier several times mentioning that an L value of 40 is a good starting point for direct drive setups. Is this in combination with a calibrated K value or is it a good starting point for running the calibrator (for example running M233 Y, test with the values 40-80 or something)
Comments
Typical range for Y on direct extruder is 30 - 150 depending on free length.
Use 1.0.4dev for best result with linear advance. There was recently some improvement I think it is only in dev tree.
I guess it is more V1 marlin kompatible also that seems to only affect the factor anyway, not how it is handled.
1. Correct. USE_ADVANCE 1 and QUADRATIC 0
2. Seems correct. Use L not K. M233 Y not X
3. Use calibrator in 1.0 mode not 1.5, value typically between 30 -150. Replace M900 K with M233 Y
4. Using L instead of K still recommended for Repetier-fw
5. Linear advance V1.0, M233 Y, Use repetier 1.0.4dev for best results.
6. 40 May be good, direct drive value typically between 30-150.
Thanks a lot. Really helped clear out a lot of the confusion I had since a lot of info was from early 2018 and I was unsure of how/if things had changed.
i was looking around , where can i find a tutorial for repetier linear adv ?
So, there are two code lines to teplace:
M900 K## with M233 Y##
And
M117 L## with M117 L##
am i right?
We have got a nice LA calibration tool which is much more visual than the Marlin calibrator.
https://k3d.tech/calibrations/la/pics/la5.png
Instructions could be found here
https://k3d.tech/calibrations/la/ and calibrator itself here https://k3d.tech/calibrations/la/k3d_la.html
Sorry but it is available only in russian. But google can translate the page for you if you don't mind.
As result it produces the K-factor ranging from 0.01 to 0.1 or whatever range we set for testing. Is it compatibel with Repetier firmware?
May be we can generate the calibration G-code and replace M900 K with M233 Y BEFORE running the calibraton?
Thank you!