Isolating robotic actuators from food and beverage preparation

1. A device, comprising:

a controller;

a first actuator configured to be controlled by the controller;

a first primary member, located on the first actuator;

a first secondary member; and

a sheet having a first side and a second side, wherein:

the first primary member is located on the first side of sheet and the first secondary member is located on the second side of sheet,

the first primary member is coupled to the first secondary member across the sheet via a coupling force, and

the first secondary member is configured to slide on the second side of the sheet, following the first primary member, actuated by the first actuator based on instructions from the controller.

2. The device of claim 1 , wherein:

the sheet is magnetically transparent;

the coupling force is a magnetic force exerted by the first primary member on the first secondary member; and

the device comprises:

a coffee dispenser on the second side of the sheet;

a dispenser of grains on the second side of the sheet; or

a salad dispenser on the second side of the sheet.

3. The device of claim 2 , wherein the first primary member comprises a permanent magnet.

4. The device of claim 2 , wherein:

the first primary member comprises at least one rare earth magnet;

the first secondary member comprising at least one magnetically attractable material; and

the at least one rare earth magnet of the first primary member is configured to magnetically attract the at least one magnetically attractable material in the first secondary member.

5. The device of claim 4 , wherein:

the at least one rare earth magnet of the first primary member has a magnetic pole oriented perpendicular to the sheet.

6. The device of claim 2 , the device further comprising:

a second primary member located on the first actuator;

a third primary member located on the first actuator;

a second secondary member located on the second side of the sheet; and

a third secondary member located on the second side of the sheet,

wherein, the second primary member is magnetically coupled to the second secondary member and the third primary member is magnetically coupled to the third secondary member.

7. The device of claim 6 , wherein the first, the second, and the third primary members are situated in an equilateral triangle configuration on the first actuator.

8. The device of claim 7 , wherein:

the first actuator is configured to move the first, the second, and the third primary members inward and outward radially.

9. The device of claim 8 , wherein:

the first, the second, and the third secondary members are configured to surround and grab an open-top vessel upon being moved inward radially.

10. The device of claim 9 , wherein the first secondary member comprises a housing that envelopes a magnet prevent direct contact of the open-top vessel with the magnet.

11. The device of claim 7 , wherein:

the first actuator is configured to rotate an assembly of the first primary member, the second primary member, and the third primary member around an axis perpendicular to a plane defined by the equilateral triangle configuration, the axis intersecting the plane at or near a center of the equilateral triangle configuration.

12. The device of claim 1 , the device further comprising:

a first plurality of bearings disposed between the first primary member and the first side of the sheet; and

a second plurality of bearings disposed between the first secondary member and the second side of the sheet.

13. The device of claim 1 , wherein:

the sheet is an air-permeable barrier;

the device comprises an air pump or fan configured to maintain higher air pressure on the second side of the sheet than the first side of the sheet; and

the first primary member is coupled to the secondary member via a suction force induced by a vacuum pump connected to the first primary member.

14. The device of claim 1 , wherein the sheet is a rigid, non-ferrous, non-magnetic barrier of substantially uniform thickness over a work area of the actuator.

15. The device of claim 1 , wherein:

the first actuator is coupled, with zero degrees of freedom, to a robotic motion system having two degrees of freedom, the robotic motion system comprising:

a first rail, having a first end and a second end;

a second rail, spaced from the first rail, the second rail having a first end and a second end, wherein the first rail and the second rail are parallel to one another;

a gantry, positioned perpendicular to the first rail and the second rail, the gantry having a first end movable along the first rail and a second end movable along the second rail;

a second actuator coupled to the first rail to move the gantry along the first rail, between the first end and the second end of the first rail, wherein the first actuator is under control of the controller;

a shaft configured to connect the first actuator to the gantry;

a third actuator coupled to the gantry to displace the first actuator along the gantry, between the first end and the second end of the gantry, wherein the third actuator is under control of the controller;

a first position sensor, coupled to the controller, disposed to measure a position of the gantry with respect to the first rail; and

a second position sensor, coupled to the controller, disposed to measure a position of the carrier with respect to the gantry,

wherein the controller is configured to cause the second actuator and the third actuator to move the shaft and to calculate a position of the actuator based on signals from the first position sensor and the second position sensor.

16. The device of claim 15 , wherein:

the first actuator is configured to adjust the distance between the first primary member and the first side of the sheet, and

the first primary member is configured to decouple from the first secondary member as the first primary member moves away from the first side of sheet.

17. The device of claim 16 , the device further comprising:

a fourth secondary member located on the second side of the sheet;

wherein the first primary member is configured to decouple from the first secondary member and to couple with the fourth secondary member using the first actuator, the second actuator, and the third actuator.

18. The device of claim 15 , wherein:

the sheet has a first region with a first thickness and a second region with a second thickness, wherein:

the first thickness is less than the second thickness; and

the sheet is magnetically transparent;

the coupling force is a magnetic force exerted by the first primary member to the first secondary member; and

the first primary member is configured to be decoupled from the first secondary member by moving the first primary member from the first region of the sheet to the second region of the sheet.

19. The device of claim 1 , the device further comprising:

a fifth secondary member, wherein the first primary member is simultaneously coupled to the first secondary member and the fifth secondary member.