有大大知道類比和數位伺服器的差異嗎?

gwagwa

QUOTE (king @ Jan 24 2006, 02:02 PM)

越看越迷糊 這樣的話 跟訊號好像又沒關係耶 一頭霧水

這個文章沒提到訊號

如果你用示波器量接收機輸出的訊號 他是數位的 好比步進馬達的訊號

我忘了在哪裡看過 類比伺服機有類比訊號的回受 因此會對其他伺服機干擾
如有誤 請前輩指教歐

lingolin

QUOTE (gwagwa @ Jan 24 2006, 01:06 PM)

QUOTE (pico @ Jan 24 2006, 01:50 PM) Many people think that Digitals are stronger and faster than analogue, but speed and power as mentioned is dependant upon the motor and gearing used in the servo (just like any servo). 很多人都認為數位式的會比類比式的強 比較快 但是 講到速度 還有力量還是要取決於他使用的馬達 還有齒輪(任何一顆伺服器也都是這樣) The increase is due to the way that digitals work. In simple terms, both digis and analogue use a feedback loop to get the servo arm to move to the desired position. The difference is that with digis it is either on or off, so 100% of the force is applied as soon as a difference is noticed, while with an analogue, it builds up as the difference increases. 多出來的就是他使用數位式的工作原理. 簡單的來說 數位或是類比 都使用回受訊號 以如願的將伺服器臏u移動到預期的位置. 不一樣的是數位伺服器的訊號不是1就是0 所以是用全部的力量去轉動, 類比的伺服器卻是利用輸入訊號跟回受訊號比較的差異而有所不同的驅動速度 多謝P大的協助

　　　

gwagwa

Q. What is the difference between an analog and digital servo?
A. The difference is in how the servo motor is controlled via the circuit board (amplifier). The motor of an analog servo receives a signal from the amplifier 30 times a second or at 30Hz. This signal allows the amplifier to update the motor position. Digital servos use a high frequency amplifier that updates the servo motor position 300 times a second or at 300Hz. By updating the motor position more often, the digital servo can deliver full torque from the beginning of movement and increases the holding power of the servo. The quick refresh also allows the digital servo to have a tighter deadband.

數位的修正頻率是300HZ 類比的只有30HZ


Q. What is servo deadband?
A. Deadband reflects the time it takes for a servo to respond when stick movement is given. Standard servos have a deadband of around 8us and high performance servos have a deadband of 1~3us.

伺服機反應角度改變的時間

因此數位的反應時間較快


看來我也想買數位伺服機了

pico

這篇討論下去
數位伺服器會大賣喔
隨便翻翻 不知道有沒有翻錯 加減看

Q. What is the difference between an analog and digital servo?
數位伺服機跟類比伺服機之間有什麼差別
A. The difference is in how the servo motor is controlled via the circuit board (amplifier). The motor of an analog servo receives a signal from the amplifier 30 times a second or at 30Hz. This signal allows the amplifier to update the motor position. Digital servos use a high frequency amplifier that updates the servo motor position 300 times a second or at 300Hz. By updating the motor position more often, the digital servo can deliver full torque from the beginning of movement and increases the holding power of the servo. The quick refresh also allows the digital servo to have a tighter deadband.
差別在於透過電路板(放大器)如何去控制伺服器的馬達. 類比式的伺服器接收訊號每秒三十次或是說30Hz. 這個訊號使得放大器得以更新馬達的轉動位置. 數位伺服器使用高頻率的放大器 頻率高達300Hz. 由於更新伺服器馬達的位置更加頻繁, 數位伺服器可以一開始就全功率移動 並且可以增加伺服器的牽制力. 快速的更新也使得數位伺服器有一個很小的死點.


Q. What is servo deadband?
什麼是伺服器的[死點](不知道有沒有現成應對的名詞)
A. Deadband reflects the time it takes for a servo to respond when stick movement is given. Standard servos have a deadband of around 8us and high performance servos have a deadband of 1~3us.
[死點]反映在 當您的搖桿移動的時候 伺服器花多少時間回應開始動作 標準的伺服器的死區大概是8us 高性能的伺服器的死區大概是1~3us

king

有點概念了 　

king

QUOTE (gwagwa @ Jan 24 2006, 01:20 PM)

Q. What is the difference between an analog and digital servo? A. The difference is in how the servo motor is controlled via the circuit board (amplifier). The motor of an analog servo receives a signal from the amplifier 30 times a second or at 30Hz. This signal allows the amplifier to update the motor position. Digital servos use a high frequency amplifier that updates the servo motor position 300 times a second or at 300Hz. By updating the motor position more often, the digital servo can deliver full torque from the beginning of movement and increases the holding power of the servo. The quick refresh also allows the digital servo to have a tighter deadband. 數位的修正頻率是300HZ 類比的只有30HZ Q. What is servo deadband? A. Deadband reflects the time it takes for a servo to respond when stick movement is given. Standard servos have a deadband of around 8us and high performance servos have a deadband of 1~3us. 伺服機反應角度改變的時間 因此數位的反應時間較快 看來我也想買數位伺服機了

修正頻率提高了

那馬達修正的速度跟的上嗎?
　

gwagwa

QUOTE (pico @ Jan 24 2006, 02:24 PM)

這篇討論下去 數位伺服器會大賣喔 隨便翻翻 不知道有沒有翻錯 加減看 Q. What is the difference between an analog and digital servo? 數位伺服機跟類比伺服機之間有什麼差別 A. The difference is in how the servo motor is controlled via the circuit board (amplifier). The motor of an analog servo receives a signal from the amplifier 30 times a second or at 30Hz. This signal allows the amplifier to update the motor position. Digital servos use a high frequency amplifier that updates the servo motor position 300 times a second or at 300Hz. By updating the motor position more often, the digital servo can deliver full torque from the beginning of movement and increases the holding power of the servo. The quick refresh also allows the digital servo to have a tighter deadband. 差別在於透過電路板(放大器)如何去控制伺服器的馬達. 類比式的伺服器接收訊號每秒三十次或是說30Hz. 這個訊號使得放大器得以更新馬達的轉動位置. 數位伺服器使用高頻率的放大器 頻率高達300Hz. 由於更新伺服器馬達的位置更加頻繁, 數位伺服器可以一開始就全功率移動 並且可以增加伺服器的牽制力. 快速的更新也使得數位伺服器有一個很小的死點. Q. What is servo deadband? 什麼是伺服器的[死點](不知道有沒有現成應對的名詞) A. Deadband reflects the time it takes for a servo to respond when stick movement is given. Standard servos have a deadband of around 8us and high performance servos have a deadband of 1~3us. [死點]反映在 當您的搖桿移動的時候 伺服器花多少時間回應開始動作 標準的伺服器的死區大概是8us 高性能的伺服器的死區大概是1~3us

亞拓數位伺服機?!

pico

亞拓有 hitec 也有 futaba數位伺服器啊
感謝俊哥提供訊息
我也學到很多

lingolin

QUOTE (gwagwa @ Jan 24 2006, 01:29 PM)

QUOTE (pico @ Jan 24 2006, 02:24 PM) 這篇討論下去 數位伺服器會大賣喔 隨便翻翻 不知道有沒有翻錯 加減看 Q. What is the difference between an analog and digital servo? 數位伺服機跟類比伺服機之間有什麼差別 A. The difference is in how the servo motor is controlled via the circuit board (amplifier). The motor of an analog servo receives a signal from the amplifier 30 times a second or at 30Hz. This signal allows the amplifier to update the motor position. Digital servos use a high frequency amplifier that updates the servo motor position 300 times a second or at 300Hz. By updating the motor position more often, the digital servo can deliver full torque from the beginning of movement and increases the holding power of the servo. The quick refresh also allows the digital servo to have a tighter deadband. 差別在於透過電路板(放大器)如何去控制伺服器的馬達. 類比式的伺服器接收訊號每秒三十次或是說30Hz. 這個訊號使得放大器得以更新馬達的轉動位置. 數位伺服器使用高頻率的放大器 頻率高達300Hz. 由於更新伺服器馬達的位置更加頻繁, 數位伺服器可以一開始就全必v移動 並且可以增加伺服器的牽制力. 快速的更新也使得數位伺服器有一個很小的死點. Q. What is servo deadband? 什麼是伺服器的[死點](不知道有沒有現成應對的名詞) A. Deadband reflects the time it takes for a servo to respond when stick movement is given. Standard servos have a deadband of around 8us and high performance servos have a deadband of 1~3us. [死點]反映在 當您的搖桿移動的時候 伺服器花多少時間回應開始動作 標準的伺服器的死區大概是8us 高性能的伺服器的死區大概是1~3us 亞拓數位伺服機?!

　　　　　

gwagwa

迷你的數位好像不多ㄟ
都是大顆的 TREX裝不下　

pico

QUOTE (gwagwa @ Jan 24 2006, 02:24 PM)

迷你的數位好像不多ㄟ 都是大顆的 TREX裝不下

很多人都用9650掛在尾管上面啊

這是去年八月 funfly比賽的時候拍的 老外的機機
比較大對不對

gwagwa

QUOTE (pico @ Jan 24 2006, 03:26 PM)

QUOTE (gwagwa @ Jan 24 2006, 02:24 PM) 迷你的數位好像不多ㄟ 都是大顆的 TREX裝不下　 很多人都用9650掛在尾管上面啊 這是去年八月 funfly比賽的時候拍的 老外的機機 比較大對不對

我裝上了 也不輸他

好重的尾巴

pico

http://shop.align.com.tw/product_info....roducts_id=1106
這顆不錯用
最近被掃貨掃得兇
尤其是價格漂亮


價格貴一點 品質也好一點
但是不要拿超大顆的來給小暴龍練身體喔
不見得最貴的是最適合的啦

chi

各位大大~~

這裡有篇futaba大略描述數位與標準伺服機的比較
PDF檔

king

3q大大
講的粉清楚哦