add post-retraction re-engage dwell time

js/kiri-driver-fdm.js

@@ -330,6 +330,7 @@ var gs_kiri_fdm = exports;
             seekMMM = process.outputSeekrate * 60,
             retDist = process.outputRetractDist,
             retSpeed = process.outputRetractSpeed * 60,
+            retDwell = Math.round((process.outputRetractDwell || 0) * 1000),
             // ratio of nozzle area to filament area times
             // ratio of slice height to filament max noodle height
             emitPerMM = print.extrudePerMM(device.nozzleSize, device.filamentSize, process.sliceHeight),
@@ -482,6 +483,7 @@ var gs_kiri_fdm = exports;
 
                 dist = lastp ? lastp.distTo2D(out.point) : 0;
 
+                // perform retraction
                 if (out.emit && retracted) {
                     moveTo({e:retracted}, retSpeed, "engage " + retracted);
                     retracted = 0;
@@ -496,10 +498,12 @@ var gs_kiri_fdm = exports;
                     moveTo({x:x, y:y}, speedMMM);
                 }
 
+                // re-engage after post-retraction move
                 if (!retracted && out.retract) {
                     retracted = retDist;
                     moveTo({e:-retracted}, retSpeed, "retract " + retDist);
                     time += (retDist / retSpeed) * 60 * 2; // retraction time
+                    if (retDwell) dwell(retDwell);
                 }
 
                 // update time and distance

js/kiri.js

@@ -85,6 +85,7 @@ self.kiri.license = exports.LICENSE;
                     outputRetractOver: 1,
                     outputRetractDist: 1,
                     outputRetractSpeed: 1,
+                    outputRetractDwell: 1,
                     outputBrimCount: 1,
                     outputBrimOffset: 1,
                     outputShortPoly: 1,
@@ -289,6 +290,7 @@ self.kiri.license = exports.LICENSE;
                 outputRetractOver: 5.0,
                 outputRetractDist: 0.5,
                 outputRetractSpeed: 20,
+                outputRetractDwell: 0.2,
                 outputWipeSpeed: 20,
                 outputWipeDistance: 0,
                 outputBrimCount: 2,
@@ -2400,6 +2402,7 @@ self.kiri.license = exports.LICENSE;
             // outputRetractOver: UC.newInput("retract over", {title:"move threshold that\ntriggers retraction\n0 to disable", convert:UC.toFloat, modes:FDM}),
             outputRetractDist: UC.newInput("retract dist", {title:"amount to retract filament", convert:UC.toFloat, modes:FDM}),
             outputRetractSpeed: UC.newInput("retract rate", {title:"speed of filament\nretraction in mm/s", convert:UC.toInt, modes:FDM}),
+            outputRetractDwell: UC.newInput("retract dwell", {title:"time between re-engaging\nfilament and movement\nin seconds", convert:UC.toFloat, modes:FDM}),
             outputWipeSpeed: UC.newInput("wipe speed", {title:"speed while wiping\nnozzle in mm/s", convert:UC.toInt, modes:FDM}),
             outputWipeDistance: UC.newInput("wipe distance", {title:"distance to wipe nozzle after\neach enclosed island completes\nin millimeters. 0 to disable", convert:UC.toInt, modes:FDM}),
             outputShortPoly: UC.newInput("short outline", {title:"poly perimeter length\ntriggers short slowdown\nin millimeters", bound:UC.bound(0,200), convert:UC.toFloat, modes:FDM}),

notes.md

@@ -59,9 +59,11 @@
 
 # FDM todo
 
+* fix thin wall support fill artifacts with complex nested polys
+* post re-engage dwell (on first layer?)
 * add support expand value to multi-part spacing (which defaults to 1mm)
 * add lay-flat auto-rotation or from selected face
-* add rafts, thin wall detection, manual supports
+* add rafts, manual supports
 * check for support / brim intersections on first layer
 * solid fill every other line, two passes. minimize heat/sag. better fill between
 * add dashed poly output on first connected brim (when offset === 0)