{"id":5039,"date":"2020-07-15T19:38:21","date_gmt":"2020-07-15T17:38:21","guid":{"rendered":"https:\/\/www.serialpicker.com\/meglio-un-attuatore-pneumatico-o-un-attuatore-elettrico-copy\/"},"modified":"2026-03-26T09:11:07","modified_gmt":"2026-03-26T08:11:07","slug":"robot-pick-and-place-azzerare-la-gravita-rende-piu-veloci","status":"publish","type":"post","link":"https:\/\/www.serialpicker.com\/en\/robot-pick-and-place-azzerare-la-gravita-rende-piu-veloci\/","title":{"rendered":"Reset gravity, to go faster!"},"content":{"rendered":"
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The combination of high speed and precision requires extreme efforts in the construction and implementation of High-speed robot systems<\/strong>.<\/p>\n

It is essential to take this into account in the motion control strategy and the mechanical design of the actuators.<\/span><\/p>\n

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\n\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\tMany automatic systems are operated and \t\t\t\nmaintained at relatively low speeds to ensure repeatability and mechanical stability\n\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t<\/p>\n\t\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n

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The moving mass<\/b> should be kept as low as possible to limit the accelerations, and consequently, the forces involved (and to avoid deformation of the moving structure).<\/p>\n

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What are the most common applications on pick and place robots?<\/span><\/h3>\n

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As already mentioned, in all those cases where it is necessary to decrease the moving masses to obtain greater dynamics; for example on high-speed robot Pick & Place<\/strong><\/a> with linear motors.<\/p>\n

The idea is to make our pick and place robot believe that the moving mass is lower (at least on the z-axis)...<\/span><\/i><\/p>\n

In this article, I talk about the advantages of a pick and place robot with linear motors<\/strong><\/a>.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n\n\t\t<\/div>\n\t<\/div>\n\n\t

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\"Serialpicker<\/div>
L'high-speed robot Serialpicker, dettaglio dell'azzeratore di gravit\u00e0 montato parallelamente all'asse Z.<\/figcaption>\n\t\t<\/figure>\n\t<\/div>\n\n\t\t<\/div>\n\t<\/div>\n<\/div>\n<\/div>\n\n
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How do you get gravity compensation?<\/h1>\n\t\t\t\t\t<\/div>\n\t
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Gravity compensation<\/b> is a well-known technique in robot design. It achieves balance over the entire range of motion - as a result, the loads on the actuator are lower.<\/p>\n

Are there any other advantages that help the performance of pick and place robots?<\/span><\/h3>\n

Let's not forget safety<\/strong>: By adopting a gravity compensation system on the z-axis of our robot, in the event of a power failure, our vertical axis cannot descend to the lower-end position, even if the robot is fully loaded.<\/p>\n

When designing the robotic system, we will choose a gravity compensator (or zero gravity compensator) that has a capacity slightly greater than the load to be transported. It will overcome the force of gravity by keeping the load in the upper-end position.<\/span><\/p>\n

In this other article, you will find a comparison between the pick and place robots with linear motors<\/strong><\/a> and the pneumatic ones.<\/p>\n

Passive support<\/span><\/h3>\n

Since gravity compensators are passive elements, once the idle position has been defined, the vertical axis and the load remains safe in position even in shutdown condition: we will consequently avoid mechanical damage to the system in case of power failure.<\/span><\/p>\n\n\t\t<\/div>\n\t<\/div>\n\n\t\t<\/div>\n\t<\/div>\n\n<\/div>\n<\/div>\n\n

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Energy saving<\/span><\/h3>\n

In fact, for as long as the system remains in the idle position the vertical axis motor will not be in action, avoiding unnecessary overheating and waste of electricity.<\/span><\/p>\n<\/div>\n<\/div>\n\n\t\t<\/div>\n\t<\/div>\n

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<\/span>If you have any doubts or want to evaluate an application with one of our technicians, do not hesitate to CONTACT US!<\/a><\/div>
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Operating principles<\/span><\/h2>\n

Although the operating principle of a gravity compensator device is very similar to that of a mechanical spring, the physical principles that characterize it are very different.<\/span><\/p>\n

A mechanical spring stores energy as potential elastic deformation energy. <\/span><\/p>\n

The Serialpicker gravity compensator<\/strong> is a device with magnetic action.<\/p>\n

Magnetic springs store potential energy in the magnetic field of permanent magnets.<\/span><\/p>\n

No mechanical mechanism is involved that is subject to failure or fatigue. These devices, therefore, have a virtually infinite life expectancy.<\/p>\n

As a result, they are ideal candidates for industrial applications with high dynamics and durability requirements.<\/p>\n<\/div>\n<\/div>\n\n\t\t<\/div>\n\t<\/div>\n\n\t\t<\/div>\n\t<\/div>\n\n\t

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\"Posizione<\/div>\n\t\t<\/figure>\n\t<\/div>\n\n\t\t<\/div>\n\t<\/div>\n<\/div>\n<\/div>\n\n
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No energy source needed<\/h2>\n\t\t\t\t\t<\/div>\n\t
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No electricity or compressed air. <\/span><\/h4>\n

The Serialpicker gravity compensator can help to raise the safety the safety standard of the robot pick and place<\/span><\/p>\n

They exert a constant force over their entire working range<\/b> - the slider is pushed out of the stator and the force rises from zero to the nominal value in a short distance and remains constant throughout the entire stroke.<\/p>\n

When applied in a vertical axis, the motor acts in applying forces only necessary for positioning and, as already mentioned, not for supporting the weight in the idle position.<\/span><\/p>\n

it can be said with some measure, that a vertical axis, thanks to the Serialpicker gravity compensator, behaves neither more nor less like a horizontal axis.<\/p>\n

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Let's see the salient features<\/h3>\n