Power modulator for infrared conveyor oven

A conveyor oven comprising:

• an oven compartment;
• a conveyor extending through the oven compartment;
• a motor that drives the conveyor;
• a first heating element,
• a first relay that controls a current flow to the first heating element;
• a second heating element,
• a second relay that controls a current flow to the second heating element;
• a third heating element,
• a third relay that controls a current flow to the third heating element;
• a fourth heating element,
• a fourth relay that controls a current flow to the fourth heating element;
• a power supply that receives external power and distributes power to the first heating element, the second heating element, the third heating element, and the fourth heating element;
• and
• an electronic controller electrically coupled to the power supply and to the first relay, the second relay, the third relay, and the fourth relays, the controller configured to execute a set of predetermined operations when a measured temperature in the oven compartment is less than a user adjustable temperature setpoint, the set of predetermined operations including
• actuating the second relay, the third relay, and the fourth relay to energize the second heating element, the third heating element, and the fourth heating element for a first predetermined period of time while the first heating element is de-energized,
• actuating the second relay after the first predetermined period of time to de-energize the second heating element for a second predetermined period of time,
• actuating the first relay after the second predetermined period of time to energize the first heating element,
• actuating the third relay after a third predetermined period of time to de-energize the third heating element for a fourth predetermined period of time,
• actuating the second relay after the fourth predetermined period of time to energize the second heating element for a fifth predetermined period of time,
• actuating the fourth relay after the fifth predetermined period of time to de-energize the fourth heating element for a sixth predetermined period of time,
• actuating the third relay after the sixth predetermined period of time to energize the third heating element for a seventh predetermined period of time,
• actuating the first relay after the seventh predetermined period of time to de-energize the first heating element for an eighth predetermined period of time,
• actuating the fourth relay after the eighth predetermined period of time to energize the fourth heating element,
• repeating the set of predetermined operations until the controller receives a signal indicating that the measured temperature is equal to or greater than the user adjustable temperature setpoint, and
• ceasing the set of predetermined operations upon receipt by the controller of the signal indicating that the measured temperature is equal to or greater than the user adjustable temperature setpoint.