Abstract: A method of controlling the feeding of part trays into a roller-hearth brazing furnace includes feeding a part tray into the furnace after the expiration of a time period. The temperatures in each heating zone of the furnace are monitored. After the expiration of the time period and before a part tray is fed into the furnace, these temperatures are compared to a specified temperature range for each zone. If all temperatures within the heating zones are within specification, the time period is decremented by a small amount. This process continues automatically until a temperature in a heating zone is not within specification when the time period expires. When this occurs, the time period is incremented by a small amount, which can be different from or the same as the amount used to decrement the time period.