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[2.0.x] LIN_ADVANCE v1.5 (#9712)

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Scott Lahteine
2018-02-23 00:53:29 -06:00
committed by GitHub
parent 90fa423737
commit 2bd252b501
52 changed files with 890 additions and 1671 deletions
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46
Marlin/src/config/examples/Mks/Sbase/Configuration_adv.h
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@@ -719,43 +719,25 @@
// @section extruder
/**
* Implementation of linear pressure control
* Linear Pressure Control v1.5
*
* Assumption: advance = k * (delta velocity)
* Assumption: advance [steps] = k * (delta velocity [steps/s])
* K=0 means advance disabled.
* See Marlin documentation for calibration instructions.
*
* NOTE: K values for LIN_ADVANCE 1.5 differ from earlier versions!
*
* Set K around 0.22 for 3mm PLA Direct Drive with ~6.5cm between the drive gear and heatbreak.
* Larger K values will be needed for flexible filament and greater distances.
* If this algorithm produces a higher speed offset than the extruder can handle (compared to E jerk)
* print acceleration will be reduced during the affected moves to keep within the limit.
*
* See http://marlinfw.org/docs/features/lin_advance.html for full instructions.
* Mention @Sebastianv650 on GitHub to alert the author of any issues.
*/
//#define LIN_ADVANCE
#if ENABLED(LIN_ADVANCE)
#define LIN_ADVANCE_K 75
/**
* Some Slicers produce Gcode with randomly jumping extrusion widths occasionally.
* For example within a 0.4mm perimeter it may produce a single segment of 0.05mm width.
* While this is harmless for normal printing (the fluid nature of the filament will
* close this very, very tiny gap), it throws off the LIN_ADVANCE pressure adaption.
*
* For this case LIN_ADVANCE_E_D_RATIO can be used to set the extrusion:distance ratio
* to a fixed value. Note that using a fixed ratio will lead to wrong nozzle pressures
* if the slicer is using variable widths or layer heights within one print!
*
* This option sets the default E:D ratio at startup. Use `M900` to override this value.
*
* Example: `M900 W0.4 H0.2 D1.75`, where:
* - W is the extrusion width in mm
* - H is the layer height in mm
* - D is the filament diameter in mm
*
* Example: `M900 R0.0458` to set the ratio directly.
*
* Set to 0 to auto-detect the ratio based on given Gcode G1 print moves.
*
* Slic3r (including Průša Control) produces Gcode compatible with the automatic mode.
* Cura (as of this writing) may produce Gcode incompatible with the automatic mode.
*/
#define LIN_ADVANCE_E_D_RATIO 0 // The calculated ratio (or 0) according to the formula W * H / ((D / 2) ^ 2 * PI)
// Example: 0.4 * 0.2 / ((1.75 / 2) ^ 2 * PI) = 0.033260135
#define LIN_ADVANCE_K 0.22 // Unit: mm compression per 1mm/s extruder speed
//#define LA_DEBUG // If enabled, this will generate debug information output over USB.
#endif
// @section leveling