1 files changed, 24 insertions(+), 6 deletions(-)

M src/main.cpp

@@ 137,7 137,7 @@ unsigned long calibration_cool_lag_time = -1;
 unsigned long calibration_heat_lag_time = -1;
 int calibration_lag_degrees = -1;
 
-// Baking
+// Baking state machine
 enum ReflowState {
 	PREHEAT,
 	SOAK,


@@ 146,6 146,7 @@ enum ReflowState {
 };
 ReflowState reflow_state = PREHEAT;
 
+// Reflow profile
 int preheat_temp = 150;
 int preheat_duration = 35'000;
 int soak_temp = 175;


@@ 154,10 155,12 @@ int reflow_temp = 249;
 int reflow_duration = 60'000;
 int cool_duration = 35'000;
 
+// Reflow meta
 int holding_at_temp = 0;
 int holding_at_time = 0;
 int holding_at_reheat_time = 0;
 int desired_temp = 0;
+int reflow_rise_time = 0;
 unsigned long reflow_state_start_time = 0;
 
 // Menus


@@ 711,11 714,26 @@ void reflow_loop() {
 			}
 			break;
 		case REFLOW:
-			if (current_time - reflow_state_start_time > reflow_duration
-					&& current_temp >= reflow_temp - calibration_lag_degrees) {
-				reflow_state = COOL;
-				reflow_state_start_time = current_time;
-				return;
+			if (reflow_rise_time == 0) {
+				if (current_temp >= reflow_temp - calibration_lag_degrees) {
+					reflow_rise_time = current_time - reflow_state_start_time;
+				}
+			} else {
+				// The reflow stage is defined as a duration above the soak
+				// temp, with a peak of the reflow temp. Therefore, once we've
+				// hit our peak and are at least the rise time through our
+				// desired temp, we transition to COOL.
+				// This ensures that we hit our peak, whilst also keeping things
+				// hot for the amount of time we're after.
+				if (reflow_duration - (current_time - reflow_state_start_time) <= reflow_rise_time
+						// Alternatively, if we've completely blown through our
+						// duration without ever hitting the peak, then just
+						// kill the elements so that we don't risk damaging
+						// anything.
+						|| current_time - reflow_state_start_time > reflow_duration) {
+					reflow_state = COOL;
+					reflow_state_start_time = current_time;
+				}
 			}
 			break;
 		case COOL: