Help:FAQ:Servos: Difference between revisions
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Shornstein (talk | contribs) Created page with "__TOC__ <translate> {{DISPLAYTITLE:All about servos|noerror}} <br /> ==Which servos can be used with MICROBEAST / MICROBEAST PLUS ?== A rule of thumb to find well suited serv..." |
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==Which servos can be used with MICROBEAST / MICROBEAST PLUS ?== | ==Which servos can be used with MICROBEAST / MICROBEAST PLUS ?== <!--T:2--> | ||
A rule of thumb to find well suited servos for you flybarless helicopter: '''As strong as necessary, as fast as possible, with less dead band as available.'''<br /> | A rule of thumb to find well suited servos for you flybarless helicopter: '''As strong as necessary, as fast as possible, with less dead band as available.'''<br /> | ||
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==My servos are getting warm/hot, is this normal?== | ==My servos are getting warm/hot, is this normal?== <!--T:3--> | ||
Similar to a tail gyro a flybarless system is constantly working and correcting. So the servos are moving much more frequently than if they are controlled manually. Additionally to that the servos are usually driven with higher frequency to enable the system giving commands to the servos as often and quick as possible. And because of the abolition of mixing levers and the support of the auxiliary rotor plane the servos have to resist higher forces in flight.<br /> | Similar to a tail gyro a flybarless system is constantly working and correcting. So the servos are moving much more frequently than if they are controlled manually. Additionally to that the servos are usually driven with higher frequency to enable the system giving commands to the servos as often and quick as possible. And because of the abolition of mixing levers and the support of the auxiliary rotor plane the servos have to resist higher forces in flight.<br /> | ||
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==Servos react somehow "notchy" at high frame rate. Is MICROBEAST damaging my servos?== | ==Servos react somehow "notchy" at high frame rate. Is MICROBEAST damaging my servos?== <!--T:4--> | ||
If the servos are approved by the manufacturer to this driving frequency, this is a normal effect. The servos get new positioning signals four times faster than if they are connected to a conventional remote control receiver. Especially servos with brushless motors run very hard and direct which causes slightly jerky movements in modes with high servo frame rate. This is totally harmless to the servos and you will not notice in flight operation.<br /> | If the servos are approved by the manufacturer to this driving frequency, this is a normal effect. The servos get new positioning signals four times faster than if they are connected to a conventional remote control receiver. Especially servos with brushless motors run very hard and direct which causes slightly jerky movements in modes with high servo frame rate. This is totally harmless to the servos and you will not notice in flight operation.<br /> | ||
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==Why do the swashplate servos run very slow when testing on the bench?== | ==Why do the swashplate servos run very slow when testing on the bench?== <!--T:5--> | ||
This is absolutely normal. With the transmitter you only give a command to rotate the helicopter in a specific direction at a given speed. The sticks no longer control the servos directly. So you can't say exactly what MICROBEAST will do with the servos when you move one of the sticks.<br /> | This is absolutely normal. With the transmitter you only give a command to rotate the helicopter in a specific direction at a given speed. The sticks no longer control the servos directly. So you can't say exactly what MICROBEAST will do with the servos when you move one of the sticks.<br /> | ||
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==Adjusting servo deflection in the transmitter does not work.== | ==Adjusting servo deflection in the transmitter does not work.== <!--T:6--> | ||
''I use DualRate in my radio to decrease rotation rates / cyclic pitch but MICROBEAST / MICROBEAST PLUS still drives my servos to full deflection when testing on the workbench!?'' | ''I use DualRate in my radio to decrease rotation rates / cyclic pitch but MICROBEAST / MICROBEAST PLUS still drives my servos to full deflection when testing on the workbench!?''<br /> | ||
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This is absolutely normal and doesn't say anything about the rotation rates you will see in flight. Similar to the tail gyro in HeadingLock mode the system measures rotation rates and tries to maintain the rotation rate that is commanded by stick input. It automatically finds the necessary amount pitch to maintain the rate. Now if you move the stick while the heli is standing on the ground you tell the system to rotate the heli with a given speed. The system measures the speed and sees that nothing happens. So it will apply more and more servo input in order to move the heli but as the heli won't move the servos will be driven to the maximum allowed deflection.<br /> | This is absolutely normal and doesn't say anything about the rotation rates you will see in flight. Similar to the tail gyro in HeadingLock mode the system measures rotation rates and tries to maintain the rotation rate that is commanded by stick input. It automatically finds the necessary amount pitch to maintain the rate. Now if you move the stick while the heli is standing on the ground you tell the system to rotate the heli with a given speed. The system measures the speed and sees that nothing happens. So it will apply more and more servo input in order to move the heli but as the heli won't move the servos will be driven to the maximum allowed deflection.<br /> | ||
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