There are several factors that are important for flipping, including angle, frequency, and smoothness. The flipping angle should be between 39 ° and 45 °. Turning angle less than 39 ° will reduce hatching rate and chick quality. Flipping should be done every hour and very gently, as eggs have fragile membranes and blood vessels that can easily rupture. If a turning angle of 39 ° cannot be achieved in the incubator, the eggs should be flipped more frequently (every 30 minutes).

Why is flipping so important

• Flipping eggs can prevent embryos from sticking to the shell membrane, especially during the hatching period, and promote the development of the embryo membrane.
• When the flipping angle is small (less than 39 °), the incidence of embryo malposition increases.
• As the embryo develops and the heat increases, regular egg flipping will alter the airflow throughout the incubator, preventing overheating in individual areas.
• Egg flipping failure during hatching week can reduce hatching rate, increase embryo mortality rate, and increase the incidence of fetal malposition. In addition, the impact of the egg flipping malfunction cannot be resolved in the later stages of incubation.
• Between 3 and 4 days of incubation, the yolk sac grows downwards around the yolk and accumulates to transfer water from the protein to the embryo fluid. Flipping can allow the yolk sac to absorb water by coming into contact with fresh protein.

• When regularly inspecting the machine, the rotating mechanism should be checked for rotation and recorded in the machine inspection log. Since the rotation angle will be at the same position every 2 hours, please make sure to check the rotation mechanism every 3 hours or at equal intervals.
• When checking the rotation angle in both directions, failure to meet the correct rotation angle in one direction can still result in losses.
• Calibrate the rotation angle every 90 days in multi-stage incubators or before each hatching in single-stage incubators. Adjust the rotating mechanism as necessary and record the adjustment in the incubator log. Calibrating the rotation angle while calibrating the temperature is effective.
• In an incubator equipped with a fixed egg rack, the machine should be checked when filled with eggs. Do not manually rotate the egg with the control switch before checking the angle. On the contrary, allowing machines to independently complete a complete rotation cycle. Some machines can reach the appropriate angle when manually rotated, but cannot reach the appropriate angle when automatically rotated.
• It is important to inspect every hatching vehicle on the machine. In some cases, the hatching car closer to the steering arm will rotate correctly, while the hatching car farther away from the steering arm will rotate at an angle less than 39 degrees.
• It is important to check both sides of the front, middle, and rear parts of the machine in a fixed egg rack incubator.
• In machines with movable incubators, it is necessary to check when the incubator is filled with eggs. An empty hatching car usually turns to the correct angle, but when it is filled with eggs, it may not reach the appropriate angle.