Controlling a vacuum system comprising a vacuum generator

1. A method for controlling a vacuum generator in a vacuum system for transportation of objects, which vacuum system comprises a vacuum generator driven by a compressed air flow via a first on/off valve, wherein the vacuum generator via a vacuum chamber being part of the vacuum system is arranged to be brought in flow connection with a vacuum gripper comprised in the vacuum system, in order to supply vacuum to the vacuum gripper in result of the compressed air flow, wherein the vacuum system comprises a second valve arranged to supply compressed air into the vacuum system; a pressure sensor for monitoring a system-pressure inside the vacuum chamber; and a vacuum system controller, wherein when the on/off valve is not flowing air to the vacuum generator, and the controller indicates a state of no vacuum generation, and if a fluctuation from a pressure-equilibrium to a negative time-derivative of the system-pressure is detected, the second valve is activated, allowing an amount of compressed air to flow into the vacuum-system for compensation to re-establish the pressure-equilibrium.

2. The method according to claim 1 , wherein system-pressure is monitored continuously and fluctuation is detected autonomously.

3. The method according to claim 1 , wherein system-pressure is monitored periodically and fluctuation is detected autonomously.

4. The method according to claim 1 , wherein the amount of compressed air that is allowed into the vacuum chamber is determined based on a duration of a previous release-cycle's air volume that was allowed into the vacuum chamber.

5. The method according to claim 1 , wherein each previous release-cycle is analyzed and it's parameters re-evaluated autonomously.

6. The method according to claim 1 , wherein parameters are also adjusted manually by an operator.

7. The method according to claim 1 , wherein parameters are only adjusted manually by an operator.

8. A controller for controlling a vacuum generator in a vacuum system for transportation of objects, which vacuum system comprises a vacuum generator driven by a compressed air flow via a first on/off valve, wherein the vacuum generator via a vacuum chamber being part of the vacuum system is arranged to be brought in flow connection with a vacuum gripper comprised in the vacuum system, in order to supply vacuum to the vacuum gripper in result of the compressed air flow, wherein the vacuum system comprises a second valve arranged to supply compressed air into the vacuum system; a pressure sensor for monitoring a system-pressure inside the vacuum chamber; and the controller, wherein the controller is arranged to communicate with the first on/off valve, the second valve and the pressure sensor and when the on/off valve is not flowing air to the vacuum generator, and the controller indicates a state of no vacuum generation, and if a fluctuation from a pressure-equilibrium to a negative time-derivative of the system-pressure is detected, the controller is arranged to activate the second valve, allowing an amount of compressed air to flow into the vacuum-chamber for compensation to re-establish the pressure-equilibrium.

9. The controller according to claim 8 , wherein the controller is arranged to monitor system-pressure continuously and to detect fluctuation autonomously.

10. The controller according to claim 8 , wherein the controller is arranged to monitor system-pressure periodically and to detect fluctuation autonomously.

11. The controller according to claim 8 , wherein the controller is arranged to determine the amount of compressed air that is allowed into the vacuum chamber based on duration of a previous release-cycle's air volume that was allowed into the vacuum chamber.

12. The controller according to claim 8 , wherein the controller is arranged to analyze each previous release-cycle and re-evaluate its parameters autonomously.

13. A vacuum system for transportation of objects, which vacuum system comprises a vacuum generator driven by a compressed air flow via a first on/off valve, wherein the vacuum generator via a vacuum chamber being part of the vacuum system is arranged to be brought in flow connection with a vacuum gripper comprised in the vacuum system, in order to supply vacuum to the vacuum gripper in result of the compressed air flow, wherein the vacuum system comprises a second valve arranged to supply compressed air into the vacuum system; a pressure sensor for monitoring a system-pressure inside the vacuum chamber; and a vacuum system controller, wherein the controller is arranged to communicate with the first on/off valve, the second valve and the pressure sensor and when the on/off valve is not flowing air to the vacuum generator, and the controller indicates a state of no vacuum generation, and if a fluctuation from a pressure-equilibrium to a negative time-derivative of the system-pressure is detected, the controller is arranged to activate the second valve, allowing an amount of compressed air to flow into the vacuum-chamber for compensation to re-establish the pressure-equilibrium.

14. The vacuum system according to claim 13 , wherein the controller is arranged to monitor system-pressure continuously and to detect fluctuation autonomously.

15. The vacuum system according to claim 13 , wherein the controller is arranged to monitor system-pressure periodically and to detect fluctuation autonomously.

16. The vacuum system according to claim 13 , wherein the controller is arranged to determine the amount of compressed air that is allowed into the vacuum chamber based on duration of a previous release-cycle's air volume that was allowed into the vacuum chamber.