DEFECTIVE: Hangprinter: Allow Hangprinter to be configured with 7 anchors

The response messages in M669 and M666 when sent empty won't fit

The solution is started here:

Duet3D#585 (comment)

Author: jtimon

src/Movement/Kinematics/HangprinterKinematics.cpp

@@ -20,11 +20,12 @@
 constexpr size_t DefaultNumAnchors = 4;
 // Default anchor coordinates
 // These are only placeholders. Each machine must have these values calibrated in order to work correctly.
-constexpr float DefaultAnchors[6][3] = {{    0.0, -2000.0, -100.0},
+constexpr float DefaultAnchors[7][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,    0.0},
+                                        {    0.0,     0.0,    0.0},
                                         {    0.0,     0.0,    0.0}};
 constexpr float DefaultPrintRadius = 1500.0;
 
@@ -84,13 +85,13 @@ 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[HANGPRINTER_MAX_AXES] = { 75.0, 75.0, 75.0, 75.0, 75.0, 75.0}; // HP4 default
+	constexpr float DefaultSpoolRadii[HANGPRINTER_MAX_AXES] = { 75.0, 75.0, 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[HANGPRINTER_MAX_AXES] = { 2, 2, 2, 2, 2, 4}; // HP4 default
-	constexpr uint32_t DefaultLinesPerSpool[HANGPRINTER_MAX_AXES] = { 1, 1, 1, 1, 1, 1}; // HP4 default
-	constexpr uint32_t DefaultMotorGearTeeth[HANGPRINTER_MAX_AXES] = {  20,  20,  20,  20,  20,  20}; // HP4 default
-	constexpr uint32_t DefaultSpoolGearTeeth[HANGPRINTER_MAX_AXES] = { 255, 255, 255, 255, 255, 255}; // HP4 default
-	constexpr uint32_t DefaultFullStepsPerMotorRev[HANGPRINTER_MAX_AXES] = { 25, 25, 25, 25, 25, 25};
+	constexpr uint32_t DefaultMechanicalAdvantage[HANGPRINTER_MAX_AXES] = { 2, 2, 2, 2, 2, 2, 4}; // HP4 default
+	constexpr uint32_t DefaultLinesPerSpool[HANGPRINTER_MAX_AXES] = { 1, 1, 1, 1, 1, 1, 1}; // HP4 default
+	constexpr uint32_t DefaultMotorGearTeeth[HANGPRINTER_MAX_AXES] = {  20,  20,  20,  20,  20,  20,  20}; // HP4 default
+	constexpr uint32_t DefaultSpoolGearTeeth[HANGPRINTER_MAX_AXES] = { 255, 255, 255, 255, 255, 255, 255}; // HP4 default
+	constexpr uint32_t DefaultFullStepsPerMotorRev[HANGPRINTER_MAX_AXES] = { 25, 25, 25, 25, 25, 25, 25};
 	ARRAY_INIT(anchors, DefaultAnchors);
 	numAnchors = DefaultNumAnchors;
 	printRadius = DefaultPrintRadius;
@@ -183,6 +184,7 @@ bool HangprinterKinematics::Configure(unsigned int mCode, GCodeBuffer& gb, const
 		{
 			Kinematics::Configure(mCode, gb, reply, error);
 			reply.lcatf("P:Print radius: %.1f", (double)printRadius);
+			// TODO FIX messages are too long if there are 7 anchors or more
 			for (size_t i = 0; i < numAnchors; ++i)
 			{
 				reply.lcatf("%c:%.2f, %.2f, %.2f",
@@ -675,8 +677,8 @@ void HangprinterKinematics::PrintParameters(const StringRef& reply) const noexce
 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_MAX_AXES] = { 0, 0, 0, 0, 0, 0 };
-	static float referencePositions[HANGPRINTER_MAX_AXES] = { 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 };
+	static CanAddress seenDrives[HANGPRINTER_MAX_AXES] = { 0, 0, 0, 0, 0, 0, 0 };
+	static float referencePositions[HANGPRINTER_MAX_AXES] = { 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 };
 	static size_t numSeenDrives = 0;
 	size_t thisDriveIdx = 0;
 

src/Movement/Kinematics/HangprinterKinematics.h

@@ -52,8 +52,8 @@ class HangprinterKinematics : public RoundBedKinematics
 
 private:
 	// Basic facts about movement system
-	const char* ANCHOR_CHARS = "ABCDEF";
-	static constexpr size_t HANGPRINTER_MAX_AXES = 6;
+	const char* ANCHOR_CHARS = "ABCDEFH"; // Skip the G, since it is reserved in G-code
+	static constexpr size_t HANGPRINTER_MAX_AXES = 7;
 	static constexpr size_t A_AXIS = 0;
 	static constexpr size_t B_AXIS = 1;
 	static constexpr size_t C_AXIS = 2;