diff --git a/src/Movement/Kinematics/HangprinterKinematics.cpp b/src/Movement/Kinematics/HangprinterKinematics.cpp index 48eafcda1e..12461fc82d 100644 --- a/src/Movement/Kinematics/HangprinterKinematics.cpp +++ b/src/Movement/Kinematics/HangprinterKinematics.cpp @@ -17,10 +17,12 @@ #include -constexpr float DefaultAnchors[4][3] = {{ 0.0, -2000.0, -100.0}, +constexpr size_t DefaultNumAnchors = 4; +constexpr float DefaultAnchors[5][3] = {{ 0.0, -2000.0, -100.0}, { 2000.0, 1000.0, -100.0}, {-2000.0, 1000.0, -100.0}, - { 0.0, 0.0, 3000.0}}; + { 0.0, 0.0, 3000.0}, + { 0.0, 0.0, 0.0}}; constexpr float DefaultPrintRadius = 1500.0; #if SUPPORT_OBJECT_MODEL @@ -43,19 +45,20 @@ constexpr ObjectModelArrayTableEntry HangprinterKinematics::objectModelArrayTabl // 11. Anchors { nullptr, // no lock needed - [] (const ObjectModel *self, const ObjectExplorationContext&) noexcept -> size_t { return HANGPRINTER_AXES; }, + [] (const ObjectModel *self, const ObjectExplorationContext&) noexcept -> size_t { return HANGPRINTER_MAX_ANCHORS; }, [] (const ObjectModel *self, ObjectExplorationContext& context) noexcept -> ExpressionValue { return ExpressionValue(self, 10 | (context.GetLastIndex() << 8), true); } } }; -DEFINE_GET_OBJECT_MODEL_ARRAY_TABLE_WITH_PARENT(HangprinterKinematics, RoundBedKinematics, 10) +// TODO how are this 10 (now 13) and this 11 (now 14) calculated? make it a macro based on HANGPRINTER_MAX_ANCHORS +DEFINE_GET_OBJECT_MODEL_ARRAY_TABLE_WITH_PARENT(HangprinterKinematics, RoundBedKinematics, 13) constexpr ObjectModelTableEntry HangprinterKinematics::objectModelTable[] = { // Within each group, these entries must be in alphabetical order // 0. kinematics members - { "anchors", OBJECT_MODEL_FUNC_ARRAY(11), ObjectModelEntryFlags::none }, - { "name", OBJECT_MODEL_FUNC(self->GetName(true)), ObjectModelEntryFlags::none }, + { "anchors", OBJECT_MODEL_FUNC_ARRAY(14), ObjectModelEntryFlags::none }, + { "name", OBJECT_MODEL_FUNC(self->GetName(true)), ObjectModelEntryFlags::none }, { "printRadius", OBJECT_MODEL_FUNC(self->printRadius, 1), ObjectModelEntryFlags::none }, }; @@ -83,22 +86,24 @@ void HangprinterKinematics::Init() noexcept * In practice you might want to compensate a bit more or a bit less */ constexpr float DefaultSpoolBuildupFactor = 0.007; /* Measure and set spool radii with M669 to achieve better accuracy */ - constexpr float DefaultSpoolRadii[4] = { 75.0, 75.0, 75.0, 75.0}; // HP4 default + constexpr float DefaultSpoolRadii[HANGPRINTER_MAX_ANCHORS] = { 75.0, 75.0, 75.0, 75.0, 75.0}; // HP4 default /* If axis runs lines back through pulley system, set mechanical advantage accordingly with M669 */ - constexpr uint32_t DefaultMechanicalAdvantage[4] = { 2, 2, 2, 4}; // HP4 default - constexpr uint32_t DefaultLinesPerSpool[4] = { 1, 1, 1, 1}; // HP4 default - constexpr uint32_t DefaultMotorGearTeeth[4] = { 20, 20, 20, 20}; // HP4 default - constexpr uint32_t DefaultSpoolGearTeeth[4] = { 255, 255, 255, 255}; // HP4 default - constexpr uint32_t DefaultFullStepsPerMotorRev[4] = { 25, 25, 25, 25}; + constexpr uint32_t DefaultMechanicalAdvantage[HANGPRINTER_MAX_ANCHORS] = { 2, 2, 2, 2, 4}; // HP4 default + constexpr uint32_t DefaultLinesPerSpool[HANGPRINTER_MAX_ANCHORS] = { 1, 1, 1, 1, 1}; // HP4 default + constexpr uint32_t DefaultMotorGearTeeth[HANGPRINTER_MAX_ANCHORS] = { 20, 20, 20, 20, 20}; // HP4 default + constexpr uint32_t DefaultSpoolGearTeeth[HANGPRINTER_MAX_ANCHORS] = { 255, 255, 255, 255, 255}; // HP4 default + constexpr uint32_t DefaultFullStepsPerMotorRev[HANGPRINTER_MAX_ANCHORS] = { 25, 25, 25, 25, 25}; constexpr float DefaultMoverWeight_kg = 0.0F; // Zero disables flex compensation feature. constexpr float DefaultSpringKPerUnitLength = 20000.0F; // Garda 1.1 is somewhere in the range [20000, 100000] - constexpr float DefaultMinPlannedForce_Newton[4] = { 0.0F }; - constexpr float DefaultMaxPlannedForce_Newton[4] = { 70.0F, 70.0F, 70.0F, 70.0F }; - constexpr float DefaultGuyWireLengths[HANGPRINTER_AXES] = { -1.0F }; // If one of these are negative they will be calculated in Recalc() instead + constexpr float DefaultMinPlannedForce_Newton[HANGPRINTER_MAX_ANCHORS] = { 0.0F }; + constexpr float DefaultMaxPlannedForce_Newton[HANGPRINTER_MAX_ANCHORS] = { 70.0F, 70.0F, 70.0F, 70.0F, 70.0F }; + constexpr float DefaultGuyWireLengths[HANGPRINTER_MAX_ANCHORS] = { -1.0F }; // If one of these are negative they will be calculated in Recalc() instead constexpr float DefaultTargetForce_Newton = 20.0F; // 20 chosen quite arbitrarily - constexpr float DefaultTorqueConstants[HANGPRINTER_AXES] = { 0.0F }; + constexpr float DefaultTorqueConstants[HANGPRINTER_MAX_ANCHORS] = { 0.0F }; ARRAY_INIT(anchors, DefaultAnchors); + anchorMode = HangprinterAnchorMode::LastOnTop; + numAnchors = DefaultNumAnchors; printRadius = DefaultPrintRadius; spoolBuildupFactor = DefaultSpoolBuildupFactor; ARRAY_INIT(spoolRadii, DefaultSpoolRadii); @@ -129,16 +134,15 @@ void HangprinterKinematics::Recalc() noexcept // This is the difference between a "line length" and a "line position" // "line length" == ("line position" + "line length in origin") - distancesOrigin[A_AXIS] = fastSqrtf(fsquare(anchors[A_AXIS][0]) + fsquare(anchors[A_AXIS][1]) + fsquare(anchors[A_AXIS][2])); - distancesOrigin[B_AXIS] = fastSqrtf(fsquare(anchors[B_AXIS][0]) + fsquare(anchors[B_AXIS][1]) + fsquare(anchors[B_AXIS][2])); - distancesOrigin[C_AXIS] = fastSqrtf(fsquare(anchors[C_AXIS][0]) + fsquare(anchors[C_AXIS][1]) + fsquare(anchors[C_AXIS][2])); - distancesOrigin[D_AXIS] = fastSqrtf(fsquare(anchors[D_AXIS][0]) + fsquare(anchors[D_AXIS][1]) + fsquare(anchors[D_AXIS][2])); - + for (size_t i = 0; i < numAnchors; ++i) + { + distancesOrigin[i] = fastSqrtf(fsquare(anchors[i][0]) + fsquare(anchors[i][1]) + fsquare(anchors[i][2])); + } //// Line buildup compensation - float stepsPerUnitTimesRTmp[HANGPRINTER_AXES] = { 0.0 }; + float stepsPerUnitTimesRTmp[HANGPRINTER_MAX_ANCHORS] = { 0.0 }; Platform& platform = reprap.GetPlatform(); // No const because we want to set drive steper per unit - for (size_t i = 0; i < HANGPRINTER_AXES; i++) + for (size_t i = 0; i < numAnchors; ++i) { const uint8_t driver = platform.GetAxisDriversConfig(i).driverNumbers[0].localDriver; // Only supports single driver bool dummy; @@ -173,12 +177,12 @@ void HangprinterKinematics::Recalc() noexcept guyWireLengths[D_AXIS] = 0.0F; } - for (size_t i{0}; i < HANGPRINTER_AXES; ++i) { + for (size_t i{0}; i < numAnchors; ++i) { springKsOrigin[i] = SpringK(distancesOrigin[i] * mechanicalAdvantage[i] + guyWireLengths[i]); } float constexpr origin[3] = { 0.0F, 0.0F, 0.0F }; StaticForces(origin, fOrigin); - for (size_t i{0}; i < HANGPRINTER_AXES; ++i) { + for (size_t i{0}; i < numAnchors; ++i) { relaxedSpringLengthsOrigin[i] = distancesOrigin[i] - fOrigin[i] / (springKsOrigin[i] * mechanicalAdvantage[i]); } @@ -203,11 +207,15 @@ bool HangprinterKinematics::Configure(unsigned int mCode, GCodeBuffer& gb, const if (mCode == 669) { const bool seenNonGeometry = TryConfigureSegmentation(gb); - gb.TryGetFloatArray('A', 3, anchors[A_AXIS], seen); - gb.TryGetFloatArray('B', 3, anchors[B_AXIS], seen); - gb.TryGetFloatArray('C', 3, anchors[C_AXIS], seen); - gb.TryGetFloatArray('D', 3, anchors[D_AXIS], seen); - + if (gb.Seen('N')) + { + numAnchors = gb.GetUIValue(); + seen = true; + } + for (size_t i = 0; i < numAnchors; ++i) + { + gb.TryGetFloatArray(ANCHOR_CHARS[i], 3, anchors[i], seen); + } if (gb.Seen('P')) { printRadius = gb.GetPositiveFValue(); @@ -221,71 +229,106 @@ bool HangprinterKinematics::Configure(unsigned int mCode, GCodeBuffer& gb, const else if (!seenNonGeometry && !gb.Seen('K')) { Kinematics::Configure(mCode, gb, reply, error); - reply.lcatf( - "A:%.2f, %.2f, %.2f\n" - "B:%.2f, %.2f, %.2f\n" - "C:%.2f, %.2f, %.2f\n" - "D:%.2f, %.2f, %.2f\n" - "P:Print radius: %.1f", - (double)anchors[A_AXIS][X_AXIS], (double)anchors[A_AXIS][Y_AXIS], (double)anchors[A_AXIS][Z_AXIS], - (double)anchors[B_AXIS][X_AXIS], (double)anchors[B_AXIS][Y_AXIS], (double)anchors[B_AXIS][Z_AXIS], - (double)anchors[C_AXIS][X_AXIS], (double)anchors[C_AXIS][Y_AXIS], (double)anchors[C_AXIS][Z_AXIS], - (double)anchors[D_AXIS][X_AXIS], (double)anchors[D_AXIS][Y_AXIS], (double)anchors[D_AXIS][Z_AXIS], - (double)printRadius - ); + for (size_t i = 0; i < numAnchors; ++i) + { + reply.lcatf("%c:%.2f, %.2f, %.2f", + ANCHOR_CHARS[i], (double)anchors[i][X_AXIS], (double)anchors[i][Y_AXIS], (double)anchors[i][Z_AXIS]); + } + reply.lcatf("P:Print radius: %.1f", (double)printRadius); } } else if (mCode == 666) { + // 0=None, 1=last-top, 2=all-top, 3-half-top, etc + uint32_t unsignedAnchorMode = (uint32_t)anchorMode; + gb.TryGetUIValue('A', unsignedAnchorMode, seen); + if (unsignedAnchorMode <= (uint32_t)HangprinterAnchorMode::AllOnTop) { + anchorMode = (HangprinterAnchorMode)unsignedAnchorMode; + } gb.TryGetFValue('Q', spoolBuildupFactor, seen); - gb.TryGetFloatArray('R', HANGPRINTER_AXES, spoolRadii, seen); - gb.TryGetUIArray('U', HANGPRINTER_AXES, mechanicalAdvantage, seen); - gb.TryGetUIArray('O', HANGPRINTER_AXES, linesPerSpool, seen); - gb.TryGetUIArray('L', HANGPRINTER_AXES, motorGearTeeth, seen); - gb.TryGetUIArray('H', HANGPRINTER_AXES, spoolGearTeeth, seen); - gb.TryGetUIArray('J', HANGPRINTER_AXES, fullStepsPerMotorRev, seen); + gb.TryGetFloatArray('R', numAnchors, spoolRadii, seen); + gb.TryGetUIArray('U', numAnchors, mechanicalAdvantage, seen); + gb.TryGetUIArray('O', numAnchors, linesPerSpool, seen); + gb.TryGetUIArray('L', numAnchors, motorGearTeeth, seen); + gb.TryGetUIArray('H', numAnchors, spoolGearTeeth, seen); + gb.TryGetUIArray('J', numAnchors, fullStepsPerMotorRev, seen); gb.TryGetFValue('W', moverWeight_kg, seen); gb.TryGetFValue('S', springKPerUnitLength, seen); - gb.TryGetFloatArray('I', HANGPRINTER_AXES, minPlannedForce_Newton, seen); - gb.TryGetFloatArray('X', HANGPRINTER_AXES, maxPlannedForce_Newton, seen); - gb.TryGetFloatArray('Y', HANGPRINTER_AXES, guyWireLengths, seen); - gb.TryGetFloatArray('C', HANGPRINTER_AXES, torqueConstants, seen); + gb.TryGetFloatArray('I', numAnchors, minPlannedForce_Newton, seen); + gb.TryGetFloatArray('X', numAnchors, maxPlannedForce_Newton, seen); + gb.TryGetFloatArray('Y', numAnchors, guyWireLengths, seen); + gb.TryGetFloatArray('C', numAnchors, torqueConstants, seen); if (seen) { Recalc(); } else { - reply.printf( - "M666 Q%.4f\n" - "R%.2f:%.2f:%.2f:%.2f\n" - "U%d:%d:%d:%d\n" - "O%d:%d:%d:%d\n" - "L%d:%d:%d:%d\n" - "H%d:%d:%d:%d\n" - "J%d:%d:%d:%d\n" - "W%.2f\n" - "S%.2f\n" - "I%.1f:%.1f:%.1f:%.1f\n" - "X%.1f:%.1f:%.1f:%.1f\n" - "Y%.1f:%.1f:%.1f:%.1f\n" - "T%.1f\n" - "C%.4f:%.4f:%.4f:%.4f", - (double)spoolBuildupFactor, - (double)spoolRadii[A_AXIS], (double)spoolRadii[B_AXIS], (double)spoolRadii[C_AXIS], (double)spoolRadii[D_AXIS], - (int)mechanicalAdvantage[A_AXIS], (int)mechanicalAdvantage[B_AXIS], (int)mechanicalAdvantage[C_AXIS], (int)mechanicalAdvantage[D_AXIS], - (int)linesPerSpool[A_AXIS], (int)linesPerSpool[B_AXIS], (int)linesPerSpool[C_AXIS], (int)linesPerSpool[D_AXIS], - (int)motorGearTeeth[A_AXIS], (int)motorGearTeeth[B_AXIS], (int)motorGearTeeth[C_AXIS], (int)motorGearTeeth[D_AXIS], - (int)spoolGearTeeth[A_AXIS], (int)spoolGearTeeth[B_AXIS], (int)spoolGearTeeth[C_AXIS], (int)spoolGearTeeth[D_AXIS], - (int)fullStepsPerMotorRev[A_AXIS], (int)fullStepsPerMotorRev[B_AXIS], (int)fullStepsPerMotorRev[C_AXIS], (int)fullStepsPerMotorRev[D_AXIS], - (double)moverWeight_kg, - (double)springKPerUnitLength, - (double)minPlannedForce_Newton[A_AXIS], (double)minPlannedForce_Newton[B_AXIS], (double)minPlannedForce_Newton[C_AXIS], (double)minPlannedForce_Newton[D_AXIS], - (double)maxPlannedForce_Newton[A_AXIS], (double)maxPlannedForce_Newton[B_AXIS], (double)maxPlannedForce_Newton[C_AXIS], (double)maxPlannedForce_Newton[D_AXIS], - (double)guyWireLengths[A_AXIS], (double)guyWireLengths[B_AXIS], (double)guyWireLengths[C_AXIS], (double)guyWireLengths[D_AXIS], - (double)targetForce_Newton, - (double)torqueConstants[A_AXIS], (double)torqueConstants[B_AXIS], (double)torqueConstants[C_AXIS], (double)torqueConstants[D_AXIS] - ); + reply.printf("M666 A%u Q%.4f\n", (unsigned)anchorMode, (double)spoolBuildupFactor); + + reply.lcatf("R%.2f", (double)spoolRadii[0]); + for (size_t i = 1; i < numAnchors; ++i) + { + reply.catf(":%.2f", (double)spoolRadii[i]); + } + + reply.lcatf("U%d", (int)mechanicalAdvantage[0]); + for (size_t i = 1; i < numAnchors; ++i) + { + reply.catf(":%d", (int)mechanicalAdvantage[i]); + } + + reply.lcatf("O%d", (int)linesPerSpool[0]); + for (size_t i = 1; i < numAnchors; ++i) + { + reply.catf(":%d", (int)linesPerSpool[i]); + } + + reply.lcatf("L%d", (int)motorGearTeeth[0]); + for (size_t i = 1; i < numAnchors; ++i) + { + reply.catf(":%d", (int)motorGearTeeth[i]); + } + + reply.lcatf("H%d", (int)spoolGearTeeth[0]); + for (size_t i = 1; i < numAnchors; ++i) + { + reply.catf(":%d", (int)spoolGearTeeth[i]); + } + + reply.lcatf("J%d", (int)fullStepsPerMotorRev[0]); + for (size_t i = 1; i < numAnchors; ++i) + { + reply.catf(":%d", (int)fullStepsPerMotorRev[i]); + } + reply.lcatf("W%.2f\n", (double)moverWeight_kg); + reply.lcatf("S%.2f\n", (double)springKPerUnitLength); + + reply.lcatf("I%.1f", (double)minPlannedForce_Newton[0]); + for (size_t i = 1; i < numAnchors; ++i) + { + reply.catf(":%.1f", (double)minPlannedForce_Newton[i]); + } + + reply.lcatf("X%.1f", (double)maxPlannedForce_Newton[0]); + for (size_t i = 1; i < numAnchors; ++i) + { + reply.catf(":%.1f", (double)maxPlannedForce_Newton[i]); + } + + reply.lcatf("Y%.1f", (double)guyWireLengths[0]); + for (size_t i = 1; i < numAnchors; ++i) + { + reply.catf(":%.1f", (double)guyWireLengths[i]); + } + reply.lcatf("T%.1f\n", (double)targetForce_Newton); + + reply.lcatf("C%.4f", (double)torqueConstants[0]); + for (size_t i = 1; i < numAnchors; ++i) + { + reply.catf(":%.4f", (double)torqueConstants[i]); + } + } } else @@ -299,36 +342,34 @@ bool HangprinterKinematics::Configure(unsigned int mCode, GCodeBuffer& gb, const bool HangprinterKinematics::CartesianToMotorSteps(const float machinePos[], const float stepsPerMm[], size_t numVisibleAxes, size_t numTotalAxes, int32_t motorPos[], bool isCoordinated) const noexcept { - float distances[HANGPRINTER_AXES]; - distances[A_AXIS] = hyp3(machinePos, anchors[A_AXIS]); - distances[B_AXIS] = hyp3(machinePos, anchors[B_AXIS]); - distances[C_AXIS] = hyp3(machinePos, anchors[C_AXIS]); - distances[D_AXIS] = hyp3(machinePos, anchors[D_AXIS]); - + float distances[numAnchors]; + for (size_t i{0}; i < numAnchors; ++i) { + distances[i] = hyp3(machinePos, anchors[i]); + } - float springKs[HANGPRINTER_AXES]; - for (size_t i{0}; i < HANGPRINTER_AXES; ++i) { + float springKs[numAnchors]; + for (size_t i{0}; i < numAnchors; ++i) { springKs[i] = SpringK(distances[i] * mechanicalAdvantage[i] + guyWireLengths[i]); } - float F[HANGPRINTER_AXES] = {0.0F}; // desired force in each direction + float F[numAnchors] = {0.0F}; // desired force in each direction StaticForces(machinePos, F); - float relaxedSpringLengths[HANGPRINTER_AXES]; - for (size_t i{0}; i < HANGPRINTER_AXES; ++i) { + float relaxedSpringLengths[numAnchors]; + for (size_t i{0}; i < numAnchors; ++i) { relaxedSpringLengths[i] = distances[i] - F[i] / (springKs[i] * mechanicalAdvantage[i]); // The second term there is the mover's movement in mm due to flex } - float linePos[HANGPRINTER_AXES]; - for (size_t i = 0; i < HANGPRINTER_AXES; ++i) { + float linePos[numAnchors]; + for (size_t i = 0; i < numAnchors; ++i) { linePos[i] = relaxedSpringLengths[i] - relaxedSpringLengthsOrigin[i]; } - motorPos[A_AXIS] = lrintf(k0[A_AXIS] * (fastSqrtf(spoolRadiiSq[A_AXIS] + linePos[A_AXIS] * k2[A_AXIS]) - spoolRadii[A_AXIS])); - motorPos[B_AXIS] = lrintf(k0[B_AXIS] * (fastSqrtf(spoolRadiiSq[B_AXIS] + linePos[B_AXIS] * k2[B_AXIS]) - spoolRadii[B_AXIS])); - motorPos[C_AXIS] = lrintf(k0[C_AXIS] * (fastSqrtf(spoolRadiiSq[C_AXIS] + linePos[C_AXIS] * k2[C_AXIS]) - spoolRadii[C_AXIS])); - motorPos[D_AXIS] = lrintf(k0[D_AXIS] * (fastSqrtf(spoolRadiiSq[D_AXIS] + linePos[D_AXIS] * k2[D_AXIS]) - spoolRadii[D_AXIS])); + for (size_t i = 0; i < numAnchors; ++i) + { + motorPos[i] = lrintf(k0[i] * (fastSqrtf(spoolRadiiSq[i] + linePos[i] * k2[i]) - spoolRadii[i])); + } return true; } @@ -342,32 +383,33 @@ inline float HangprinterKinematics::MotorPosToLinePos(const int32_t motorPos, si void HangprinterKinematics::flexDistances(float const machinePos[3], float const distanceA, float const distanceB, float const distanceC, - float const distanceD, float flex[HANGPRINTER_AXES]) const noexcept { - float springKs[HANGPRINTER_AXES] = { + float const distanceD, float flex[HANGPRINTER_MAX_ANCHORS]) const noexcept { + // TODO do this thing for all anchors + float springKs[numAnchors] = { SpringK(distanceA * mechanicalAdvantage[A_AXIS] + guyWireLengths[A_AXIS]), SpringK(distanceB * mechanicalAdvantage[B_AXIS] + guyWireLengths[B_AXIS]), SpringK(distanceC * mechanicalAdvantage[C_AXIS] + guyWireLengths[C_AXIS]), SpringK(distanceD * mechanicalAdvantage[D_AXIS] + guyWireLengths[D_AXIS]) }; - float F[HANGPRINTER_AXES] = {0.0F}; // desired force in each direction + float F[numAnchors] = {0.0F}; // desired force in each direction StaticForces(machinePos, F); - float relaxedSpringLengths[HANGPRINTER_AXES] = { + float relaxedSpringLengths[numAnchors] = { distanceA - F[A_AXIS] / (springKs[A_AXIS] * mechanicalAdvantage[A_AXIS]), distanceB - F[B_AXIS] / (springKs[B_AXIS] * mechanicalAdvantage[B_AXIS]), distanceC - F[C_AXIS] / (springKs[C_AXIS] * mechanicalAdvantage[C_AXIS]), distanceD - F[D_AXIS] / (springKs[D_AXIS] * mechanicalAdvantage[D_AXIS]) }; - float linePos[HANGPRINTER_AXES] = { + float linePos[numAnchors] = { relaxedSpringLengths[A_AXIS] - relaxedSpringLengthsOrigin[A_AXIS], relaxedSpringLengths[B_AXIS] - relaxedSpringLengthsOrigin[B_AXIS], relaxedSpringLengths[C_AXIS] - relaxedSpringLengthsOrigin[C_AXIS], relaxedSpringLengths[D_AXIS] - relaxedSpringLengthsOrigin[D_AXIS] }; - float distanceDifferences[HANGPRINTER_AXES] = { + float distanceDifferences[numAnchors] = { distanceA - distancesOrigin[A_AXIS], distanceB - distancesOrigin[B_AXIS], distanceC - distancesOrigin[C_AXIS], @@ -384,6 +426,7 @@ void HangprinterKinematics::flexDistances(float const machinePos[3], float const // Assumes lines are tight and anchor location norms are followed void HangprinterKinematics::MotorStepsToCartesian(const int32_t motorPos[], const float stepsPerMm[], size_t numVisibleAxes, size_t numTotalAxes, float machinePos[]) const noexcept { + // TODO Use all anchors when numAnchors > 4, to have less error float const distanceA = MotorPosToLinePos(motorPos[A_AXIS], A_AXIS) + distancesOrigin[A_AXIS]; float const distanceB = MotorPosToLinePos(motorPos[B_AXIS], B_AXIS) + distancesOrigin[B_AXIS]; float const distanceC = MotorPosToLinePos(motorPos[C_AXIS], C_AXIS) + distancesOrigin[C_AXIS]; @@ -392,7 +435,7 @@ void HangprinterKinematics::MotorStepsToCartesian(const int32_t motorPos[], cons // Now we have an approximate machinePos // Let's correct for line flex - float flex[HANGPRINTER_AXES] = { 0.0F }; + float flex[numAnchors] = { 0.0F }; flexDistances(machinePos, distanceA, distanceB, distanceC, distanceD, flex); float const adjustedDistanceA = distanceA - flex[A_AXIS]; float const adjustedDistanceB = distanceB - flex[B_AXIS]; @@ -419,17 +462,53 @@ static bool isSameSide(float const v0[3], float const v1[3], float const v2[3], return dot0*dot1 > 0.0F; } -static bool isInsideTetrahedron(float const point[3], float const tetrahedron[4][3]){ - return isSameSide(tetrahedron[0], tetrahedron[1], tetrahedron[2], tetrahedron[3], point) && - isSameSide(tetrahedron[2], tetrahedron[1], tetrahedron[3], tetrahedron[0], point) && - isSameSide(tetrahedron[2], tetrahedron[3], tetrahedron[0], tetrahedron[1], point) && - isSameSide(tetrahedron[0], tetrahedron[3], tetrahedron[1], tetrahedron[2], point); +bool HangprinterKinematics::IsInsidePyramidSides(float const coords[3]) const noexcept +{ + bool reachable = true; + + // Check all the planes defined by triangle sides in the pyramid + for (size_t i = 0; reachable && i < numAnchors - 1; ++i) { + reachable = reachable && isSameSide(anchors[i], anchors[(i+1) % (numAnchors - 1)], anchors[numAnchors - 1], anchors[(i+2) % (numAnchors - 1)], coords); + } + return reachable; } +bool HangprinterKinematics::IsInsidePrismSides(float const coords[3], unsigned const discount_last) const noexcept +{ + bool reachable = true; + + // For each side of the base, check the plane formed by side and another point bellow them in z. + for (size_t i = 0; reachable && i < numAnchors - discount_last; ++i) { + float const lower_point[3] = {anchors[i][0], anchors[i][1], anchors[i][2] - 1}; + reachable = reachable && isSameSide(anchors[i], anchors[(i+1) % (numAnchors - 1)], lower_point, anchors[(i+2) % (numAnchors - 1)], coords); + } + return reachable; +} + +// For each triangle side in a pseudo-pyramid, check if the point is inside the pyramid (Except for the base) +// Also check that any point below the line between two exterior anchors (all anchors are exterior except for the last one) +// is in the "inside part" all the way down to min_Z, however low it may be. +// To further limit the movements in the X and Y axes one can simply set a smaller print radius. bool HangprinterKinematics::IsReachable(float axesCoords[MaxAxes], AxesBitmap axes) const noexcept /*override*/ { float const coords[3] = {axesCoords[X_AXIS], axesCoords[Y_AXIS], axesCoords[Z_AXIS]}; - return isInsideTetrahedron(coords, anchors); + bool reachable = true; + + switch (anchorMode) { + case HangprinterAnchorMode::None: + return true; + + // This reaches a pyramid on top of the lower prism if the bed is below the lower anchors + case HangprinterAnchorMode::LastOnTop: + default: + reachable = IsInsidePyramidSides(coords); + return reachable && IsInsidePrismSides(coords, 1); + + case HangprinterAnchorMode::AllOnTop: + return IsInsidePrismSides(coords, 0); + }; + + return reachable; } // Limit the Cartesian position that the user wants to move to returning true if we adjusted the position @@ -508,7 +587,10 @@ AxesBitmap HangprinterKinematics::AxesAssumedHomed(AxesBitmap g92Axes) const noe // If all of X, Y and Z have been specified then we know the positions of all 4 spool motors, otherwise we don't if ((g92Axes & XyzAxes) == XyzAxes) { - g92Axes.SetBit(D_AXIS); + for (size_t i = 3; i < numAnchors; ++i) + { + g92Axes.SetBit(i); + } } else { @@ -532,69 +614,116 @@ AxesBitmap HangprinterKinematics::MustBeHomedAxes(AxesBitmap axesMoving, bool di // Write the parameters to a file, returning true if success bool HangprinterKinematics::WriteCalibrationParameters(FileStore *f) const noexcept { - bool ok = f->Write("; Hangprinter parameters\n"); - if (ok) + bool ok = false; + String<255> scratchString; + + scratchString.printf("; Hangprinter parameters\n"); + scratchString.printf("M669 K6 "); + ok = f->Write(scratchString.c_str()); + if (!ok) return false; + + scratchString.printf("N%d", numAnchors); + for (size_t i = 0; i < numAnchors; ++i) { - String<100> scratchString; - scratchString.printf("M669 K6 A%.3f:%.3f:%.3f B%.3f:%.3f:%.3f", - (double)anchors[A_AXIS][X_AXIS], (double)anchors[A_AXIS][Y_AXIS], (double)anchors[A_AXIS][Z_AXIS], - (double)anchors[B_AXIS][X_AXIS], (double)anchors[B_AXIS][Y_AXIS], (double)anchors[B_AXIS][Z_AXIS]); - ok = f->Write(scratchString.c_str()); - if (ok) - { - scratchString.printf(" C%.3f:%.3f:%.3f D%.3f:%.3f:%.3f P%.1f\n", - (double)anchors[C_AXIS][X_AXIS], (double)anchors[C_AXIS][Y_AXIS], (double)anchors[C_AXIS][Z_AXIS], - (double)anchors[D_AXIS][X_AXIS], (double)anchors[D_AXIS][Y_AXIS], (double)anchors[D_AXIS][Z_AXIS], - (double)printRadius); - ok = f->Write(scratchString.c_str()); - if (ok) - { - scratchString.printf("M666 Q%.6f R%.3f:%.3f:%.3f:%.3f U%d:%d:%d:%d", - (double)spoolBuildupFactor, (double)spoolRadii[A_AXIS], - (double)spoolRadii[B_AXIS], (double)spoolRadii[C_AXIS], (double)spoolRadii[D_AXIS], - (int)mechanicalAdvantage[A_AXIS], (int)mechanicalAdvantage[B_AXIS], - (int)mechanicalAdvantage[C_AXIS], (int)mechanicalAdvantage[D_AXIS] - ); - ok = f->Write(scratchString.c_str()); - if (ok) - { - scratchString.printf(" O%d:%d:%d:%d L%d:%d:%d:%d H%d:%d:%d:%d J%d:%d:%d:%d", - (int)linesPerSpool[A_AXIS], (int)linesPerSpool[B_AXIS], - (int)linesPerSpool[C_AXIS], (int)linesPerSpool[D_AXIS], - (int)motorGearTeeth[A_AXIS], (int)motorGearTeeth[B_AXIS], - (int)motorGearTeeth[C_AXIS], (int)motorGearTeeth[D_AXIS], - (int)spoolGearTeeth[A_AXIS], (int)spoolGearTeeth[B_AXIS], - (int)spoolGearTeeth[C_AXIS], (int)spoolGearTeeth[D_AXIS], - (int)fullStepsPerMotorRev[A_AXIS], (int)fullStepsPerMotorRev[B_AXIS], - (int)fullStepsPerMotorRev[C_AXIS], (int)fullStepsPerMotorRev[D_AXIS] - ); - ok = f->Write(scratchString.c_str()); - if (ok) - { - scratchString.printf(" W%.2f S%.2f I%.1f:%.1f:%.1f:%.1f X%.1f:%.1f:%.1f:%.1f", - (double)moverWeight_kg, (double)springKPerUnitLength, - (double)minPlannedForce_Newton[A_AXIS], (double)minPlannedForce_Newton[B_AXIS], - (double)minPlannedForce_Newton[C_AXIS], (double)minPlannedForce_Newton[D_AXIS], - (double)maxPlannedForce_Newton[A_AXIS], (double)maxPlannedForce_Newton[B_AXIS], - (double)maxPlannedForce_Newton[C_AXIS], (double)maxPlannedForce_Newton[D_AXIS] - ); - ok = f->Write(scratchString.c_str()); - if (ok) - { - scratchString.printf(" Y%.1f:%.1f:%.1f:%.1f T%.1f C%.4f:%.4f:%.4f:%.4f\n", - (double)guyWireLengths[A_AXIS], (double)guyWireLengths[B_AXIS], - (double)guyWireLengths[C_AXIS], (double)guyWireLengths[D_AXIS], - (double)targetForce_Newton, - (double)torqueConstants[A_AXIS], (double)torqueConstants[B_AXIS], - (double)torqueConstants[C_AXIS], (double)torqueConstants[D_AXIS] - ); - ok = f->Write(scratchString.c_str()); - } - } - } - } - } + scratchString.catf("%c%.3f:%.3f:%.3f ", ANCHOR_CHARS[i], (double)anchors[i][X_AXIS], (double)anchors[i][Y_AXIS], (double)anchors[i][Z_AXIS]); + } + ok = f->Write(scratchString.c_str()); + if (!ok) return false; + + scratchString.printf(" P%.1f", (double)printRadius); + ok = f->Write(scratchString.c_str()); + if (!ok) return false; + + scratchString.printf("M666 A%u Q%.6f ", (unsigned)anchorMode, (double)spoolBuildupFactor); + ok = f->Write(scratchString.c_str()); + if (!ok) return false; + + scratchString.printf("R%.3f", (double)spoolRadii[0]); + for (size_t i = 1; i < numAnchors; ++i) + { + scratchString.catf(":%.3f", (double)spoolRadii[i]); + } + ok = f->Write(scratchString.c_str()); + if (!ok) return false; + + scratchString.printf(" U%.3f", (double)mechanicalAdvantage[0]); + for (size_t i = 1; i < numAnchors; ++i) + { + scratchString.catf(":%.3f", (double)mechanicalAdvantage[i]); + } + ok = f->Write(scratchString.c_str()); + if (!ok) return false; + + scratchString.printf(" O%.3f", (double)linesPerSpool[0]); + for (size_t i = 1; i < numAnchors; ++i) + { + scratchString.catf(":%.3f", (double)linesPerSpool[i]); } + ok = f->Write(scratchString.c_str()); + if (!ok) return false; + + scratchString.printf(" L%.3f", (double)motorGearTeeth[0]); + for (size_t i = 1; i < numAnchors; ++i) + { + scratchString.catf(":%.3f", (double)motorGearTeeth[i]); + } + ok = f->Write(scratchString.c_str()); + if (!ok) return false; + + scratchString.printf(" H%.3f", (double)spoolGearTeeth[0]); + for (size_t i = 1; i < numAnchors; ++i) + { + scratchString.catf(":%.3f", (double)spoolGearTeeth[i]); + } + ok = f->Write(scratchString.c_str()); + if (!ok) return false; + + scratchString.printf(" J%.3f", (double)fullStepsPerMotorRev[0]); + for (size_t i = 1; i < numAnchors; ++i) + { + scratchString.catf(":%.3f", (double)fullStepsPerMotorRev[i]); + } + ok = f->Write(scratchString.c_str()); + + scratchString.printf(" W%.2f S%.2f", (double)moverWeight_kg, (double)springKPerUnitLength); + ok = f->Write(scratchString.c_str()); + if (!ok) return false; + + scratchString.printf(" I%.1f", (double)minPlannedForce_Newton[0]); + for (size_t i = 1; i < numAnchors; ++i) + { + scratchString.catf(":%.1f", (double)minPlannedForce_Newton[i]); + } + ok = f->Write(scratchString.c_str()); + if (!ok) return false; + + scratchString.printf(" X%.1f", (double)maxPlannedForce_Newton[0]); + for (size_t i = 1; i < numAnchors; ++i) + { + scratchString.catf(":%.1f", (double)maxPlannedForce_Newton[i]); + } + ok = f->Write(scratchString.c_str()); + if (!ok) return false; + + scratchString.printf(" Y%.1f", (double)guyWireLengths[0]); + for (size_t i = 1; i < numAnchors; ++i) + { + scratchString.catf(":%.1f", (double)guyWireLengths[i]); + } + ok = f->Write(scratchString.c_str()); + if (!ok) return false; + + scratchString.printf(" T%.1f", (double)targetForce_Newton); + ok = f->Write(scratchString.c_str()); + if (!ok) return false; + + scratchString.printf(" C%.4f", (double)torqueConstants[0]); + for (size_t i = 1; i < numAnchors; ++i) + { + scratchString.catf(":%.4f", (double)torqueConstants[i]); + } + ok = f->Write(scratchString.c_str()); + return ok; } @@ -698,10 +827,12 @@ void HangprinterKinematics::ForwardTransform(float const a, float const b, float // Print all the parameters for debugging void HangprinterKinematics::PrintParameters(const StringRef& reply) const noexcept { - reply.printf("Anchor coordinates (%.2f,%.2f,%.2f) (%.2f,%.2f,%.2f) (%.2f,%.2f,%.2f)\n", - (double)anchors[A_AXIS][X_AXIS], (double)anchors[A_AXIS][Y_AXIS], (double)anchors[A_AXIS][Z_AXIS], - (double)anchors[B_AXIS][X_AXIS], (double)anchors[B_AXIS][Y_AXIS], (double)anchors[B_AXIS][Z_AXIS], - (double)anchors[C_AXIS][X_AXIS], (double)anchors[C_AXIS][Y_AXIS], (double)anchors[C_AXIS][Z_AXIS]); + reply.printf("Anchor coordinates"); + for (size_t i = 0; i < numAnchors; ++i) + { + reply.catf(" (%.2f,%.2f,%.2f)", (double)anchors[i][X_AXIS], (double)anchors[i][Y_AXIS], (double)anchors[i][Z_AXIS]); + } + reply.cat("\n"); } #if DUAL_CAN @@ -745,8 +876,8 @@ HangprinterKinematics::ODriveAnswer HangprinterKinematics::GetODrive3MotorCurren HangprinterKinematics::ODriveAnswer HangprinterKinematics::GetODrive3EncoderEstimate(DriverId const driver, bool const makeReference, const StringRef& reply, bool const subtractReference) THROWS(GCodeException) { const uint8_t cmd = CANSimple::MSG_GET_ENCODER_ESTIMATES; - static CanAddress seenDrives[HANGPRINTER_AXES] = { 0, 0, 0, 0 }; - static float referencePositions[HANGPRINTER_AXES] = { 0.0, 0.0, 0.0, 0.0 }; + static CanAddress seenDrives[HANGPRINTER_MAX_ANCHORS] = { 0, 0, 0, 0, 0 }; + static float referencePositions[HANGPRINTER_MAX_ANCHORS] = { 0.0, 0.0, 0.0, 0.0, 0.0 }; static size_t numSeenDrives = 0; size_t thisDriveIdx = 0; @@ -757,15 +888,15 @@ HangprinterKinematics::ODriveAnswer HangprinterKinematics::GetODrive3EncoderEsti bool const newOne = (thisDriveIdx == numSeenDrives); if (newOne) { - if (numSeenDrives < HANGPRINTER_AXES) + if (numSeenDrives < numAnchors) { seenDrives[thisDriveIdx] = driver.boardAddress; numSeenDrives++; } else // we don't have space for a new one { - reply.printf("Max CAN addresses we can reference is %d. Can't reference board %d.", HANGPRINTER_AXES, driver.boardAddress); - numSeenDrives = HANGPRINTER_AXES; + reply.printf("Max CAN addresses we can reference is %d. Can't reference board %d.", numAnchors, driver.boardAddress); + numSeenDrives = numAnchors; return {}; } } @@ -826,14 +957,14 @@ HangprinterKinematics::ODriveAnswer HangprinterKinematics::GetODrive3EncoderEsti #if DUAL_CAN GCodeResult HangprinterKinematics::ReadODrive3AxisForce(DriverId const driver, const StringRef& reply, float setTorqueConstants[], uint32_t setMechanicalAdvantage[], uint32_t setSpoolGearTeeth[], uint32_t setMotorGearTeeth[], float setSpoolRadii[]) THROWS(GCodeException) { - static float torqueConstants_[HANGPRINTER_AXES] = { 0.0 }; - static uint32_t mechanicalAdvantage_[HANGPRINTER_AXES] = { 0 }; - static uint32_t spoolGearTeeth_[HANGPRINTER_AXES] = { 0 }; - static uint32_t motorGearTeeth_[HANGPRINTER_AXES] = { 0 }; - static float spoolRadii_[HANGPRINTER_AXES] = { 0.0 }; + static float torqueConstants_[numAnchors] = { 0.0 }; + static uint32_t mechanicalAdvantage_[numAnchors] = { 0 }; + static uint32_t spoolGearTeeth_[numAnchors] = { 0 }; + static uint32_t motorGearTeeth_[numAnchors] = { 0 }; + static float spoolRadii_[numAnchors] = { 0.0 }; if (setTorqueConstants != nullptr && setMechanicalAdvantage != nullptr && setSpoolGearTeeth != nullptr && setMotorGearTeeth != nullptr && setSpoolRadii != nullptr) { - for(size_t i{0}; i < HANGPRINTER_AXES; ++i) { + for(size_t i{0}; i < numAnchors; ++i) { torqueConstants_[i] = setTorqueConstants[i]; mechanicalAdvantage_[i] = setMechanicalAdvantage[i]; spoolGearTeeth_[i] = setSpoolGearTeeth[i]; @@ -956,13 +1087,13 @@ GCodeResult HangprinterKinematics::SetODrive3TorqueMode(DriverId const driver, f uint32_t setMechanicalAdvantage[], uint32_t setSpoolGearTeeth[], uint32_t setMotorGearTeeth[], float setSpoolRadii[]) noexcept { - static uint32_t mechanicalAdvantage_[HANGPRINTER_AXES] = { 0 }; - static uint32_t spoolGearTeeth_[HANGPRINTER_AXES] = { 0 }; - static uint32_t motorGearTeeth_[HANGPRINTER_AXES] = { 0 }; - static float spoolRadii_[HANGPRINTER_AXES] = { 0.0 }; + static uint32_t mechanicalAdvantage_[numAnchors] = { 0 }; + static uint32_t spoolGearTeeth_[numAnchors] = { 0 }; + static uint32_t motorGearTeeth_[numAnchors] = { 0 }; + static float spoolRadii_[numAnchors] = { 0.0 }; if (setMechanicalAdvantage != nullptr && setSpoolGearTeeth != nullptr && setMotorGearTeeth != nullptr && setSpoolRadii != nullptr) { - for(size_t i{0}; i < HANGPRINTER_AXES; ++i) { + for(size_t i{0}; i < numAnchors; ++i) { mechanicalAdvantage_[i] = setMechanicalAdvantage[i]; spoolGearTeeth_[i] = setSpoolGearTeeth[i]; motorGearTeeth_[i] = setMotorGearTeeth[i]; diff --git a/src/Movement/Kinematics/HangprinterKinematics.h b/src/Movement/Kinematics/HangprinterKinematics.h index 8280e73217..54a9943c13 100644 --- a/src/Movement/Kinematics/HangprinterKinematics.h +++ b/src/Movement/Kinematics/HangprinterKinematics.h @@ -12,6 +12,13 @@ #if SUPPORT_HANGPRINTER +// Different modes can be configured for different tradeoffs in terms of printing volumes and speeds +enum class HangprinterAnchorMode { + None, // All is reacheable in None anchor mode as printing volume + LastOnTop, // (Default) Rsults in a pyramid plus a prism below if the lower anchors are above the printing bed + AllOnTop, // Result in a prism (speeds get limited, specially going down in Z) +}; + class HangprinterKinematics : public RoundBedKinematics { public: @@ -55,9 +62,13 @@ class HangprinterKinematics : public RoundBedKinematics protected: DECLARE_OBJECT_MODEL_WITH_ARRAYS + bool IsInsidePyramidSides(float const coords[3]) const noexcept; + bool IsInsidePrismSides(float const coords[3], unsigned const discount_last) const noexcept; + private: // Basic facts about movement system - static constexpr size_t HANGPRINTER_AXES = 4; + const char* ANCHOR_CHARS = "ABCDIJKLO"; // anchors shouldn't be conflated with axes + static constexpr size_t HANGPRINTER_MAX_ANCHORS = 5; static constexpr size_t A_AXIS = 0; static constexpr size_t B_AXIS = 1; static constexpr size_t C_AXIS = 2; @@ -71,48 +82,47 @@ class HangprinterKinematics : public RoundBedKinematics void PrintParameters(const StringRef& reply) const noexcept; // Print all the parameters for debugging // The real defaults are in the cpp file + HangprinterAnchorMode anchorMode = HangprinterAnchorMode::LastOnTop; + size_t numAnchors; float printRadius = 0.0F; - float anchors[HANGPRINTER_AXES][3] = {{ 0.0, 0.0, 0.0}, - { 0.0, 0.0, 0.0}, - { 0.0, 0.0, 0.0}, - { 0.0, 0.0, 0.0}}; + float anchors[HANGPRINTER_MAX_ANCHORS][3]; // Line buildup compensation configurables /* The real defaults are in the Init() function, since we sometimes need to reset * defaults during runtime */ float spoolBuildupFactor = 0.0F; - float spoolRadii[HANGPRINTER_AXES] = { 0.0F }; - uint32_t mechanicalAdvantage[HANGPRINTER_AXES] = { 0 }; - uint32_t linesPerSpool[HANGPRINTER_AXES] = { 0 }; - uint32_t motorGearTeeth[HANGPRINTER_AXES] = { 0 }; - uint32_t spoolGearTeeth[HANGPRINTER_AXES] = { 0 }; - uint32_t fullStepsPerMotorRev[HANGPRINTER_AXES] = { 0 }; + float spoolRadii[HANGPRINTER_MAX_ANCHORS] = { 0.0F }; + uint32_t mechanicalAdvantage[HANGPRINTER_MAX_ANCHORS] = { 0 }; + uint32_t linesPerSpool[HANGPRINTER_MAX_ANCHORS] = { 0 }; + uint32_t motorGearTeeth[HANGPRINTER_MAX_ANCHORS] = { 0 }; + uint32_t spoolGearTeeth[HANGPRINTER_MAX_ANCHORS] = { 0 }; + uint32_t fullStepsPerMotorRev[HANGPRINTER_MAX_ANCHORS] = { 0 }; // Flex compensation configurables float moverWeight_kg = 0.0F; float springKPerUnitLength = 0.0F; - float minPlannedForce_Newton[HANGPRINTER_AXES] = { 0.0F }; - float maxPlannedForce_Newton[HANGPRINTER_AXES] = { 0.0F }; - float guyWireLengths[HANGPRINTER_AXES] = { 0.0F }; + float minPlannedForce_Newton[HANGPRINTER_MAX_ANCHORS] = { 0.0F }; + float maxPlannedForce_Newton[HANGPRINTER_MAX_ANCHORS] = { 0.0F }; + float guyWireLengths[HANGPRINTER_MAX_ANCHORS] = { 0.0F }; float targetForce_Newton = 0.0F; - float torqueConstants[HANGPRINTER_AXES] = { 0.0F }; + float torqueConstants[HANGPRINTER_MAX_ANCHORS] = { 0.0F }; // Derived parameters - float k0[HANGPRINTER_AXES] = { 0.0F }; - float spoolRadiiSq[HANGPRINTER_AXES] = { 0.0F }; - float k2[HANGPRINTER_AXES] = { 0.0F }; - float distancesOrigin[HANGPRINTER_AXES] = { 0.0F }; - float springKsOrigin[HANGPRINTER_AXES] = { 0.0F }; - float relaxedSpringLengthsOrigin[HANGPRINTER_AXES] = { 0.0F }; - float fOrigin[HANGPRINTER_AXES] = { 0.0F }; + float k0[HANGPRINTER_MAX_ANCHORS] = { 0.0F }; + float spoolRadiiSq[HANGPRINTER_MAX_ANCHORS] = { 0.0F }; + float k2[HANGPRINTER_MAX_ANCHORS] = { 0.0F }; + float distancesOrigin[HANGPRINTER_MAX_ANCHORS] = { 0.0F }; + float springKsOrigin[HANGPRINTER_MAX_ANCHORS] = { 0.0F }; + float relaxedSpringLengthsOrigin[HANGPRINTER_MAX_ANCHORS] = { 0.0F }; + float fOrigin[HANGPRINTER_MAX_ANCHORS] = { 0.0F }; float printRadiusSquared = 0.0F; float SpringK(float const springLength) const noexcept; void StaticForces(float const machinePos[3], float F[4]) const noexcept; void flexDistances(float const machinePos[3], float const distanceA, float const distanceB, float const distanceC, - float const distanceD, float flex[HANGPRINTER_AXES]) const noexcept; + float const distanceD, float flex[HANGPRINTER_MAX_ANCHORS]) const noexcept; #if DUAL_CAN // Some CAN helpers