Hong Kong RC Sailplane Forum 香港滑翔機發燒友論壇

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PostPosted: 28 Feb 2004 01:59 am 
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Joined: 26 Feb 2004 09:23 pm
Posts: 93
我的是 60W,圓尖咀,剛用來焊多兩粒 500mAh Sanyo AR 電池落pack電內,是「一條柱」式,直接頭尾焊,無用 connector,除了最後一粒電池外。

我搞了好耐,請問 60W 是否足夠?我辣到 pack 電好熱,電池殼外的 label 都發脹,希望無事。現在正慢差,不覺有短路問題。


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PostPosted: 28 Feb 2004 03:02 am 
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Joined: 26 Feb 2004 05:08 pm
Posts: 2944
Location: Hong Kong
60W 應該夠力,不過你銲到label都發脹就好似有問題,銲電最緊要辣雞夠熱,以最少時間加熱電池至銲錫熔解的溫度,用扁平的辣雞咀轉熱較佳,我支只係40W,不過係恆溫既,Set到400C一般電池都冇間題。係hobby lobby 有一種銲電專用的jig,睇黎唔錯,http://www.hobby-lobby.com/bataccy.htm 不過我比較喜歡用吸錫線做tab,較易銲,撞機時又可作緩衝。


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 Post subject:
PostPosted: 28 Feb 2004 12:25 pm 
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Joined: 28 Feb 2004 12:04 pm
Posts: 65
Location: HONG KONG
以前雙星有支7.2V辣雞好正, 不過無出啦
車仔佬比賽都用
我依家用420度恆辣雞焊電


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 Post subject:
PostPosted: 28 Feb 2004 06:44 pm 
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Joined: 26 Feb 2004 05:31 pm
Posts: 741
Location: 沙田
點解 Chester 個 post 咁多字變左格仔 ? 個 forum 既程式係唔係有特別智能去刪走D不雅語言 ?


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 Post subject:
PostPosted: 28 Feb 2004 09:26 pm 
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Joined: 26 Feb 2004 07:54 pm
Posts: 1660
Location: Tai Po, HK
Chester 係我地 HKRCSS 尊貴既會長,又點會打 D 不雅語言呀。 :o
D 格仔應該係佢用左香港字型 。
例如 口既 -->  口左 -->  :wink:
上面 D 正方型係我打左香港字入去,唔係不雅字 :D


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 Post subject:
PostPosted: 28 Feb 2004 09:34 pm 
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Joined: 26 Feb 2004 03:51 pm
Posts: 3626
Location: Hong Kong
Willy, 焊之前最好用砂紙擦個電池金屬片,易上錫好多,唔需要焊到個電池label發脹


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 Post subject:
PostPosted: 28 Feb 2004 10:20 pm 
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Joined: 26 Feb 2004 09:23 pm
Posts: 93
Pack 電焊得好差,因為今日「科大」試,第二個 flight,在半空未到一分鐘,巳經 motor cut,半油都唔郁,降落後連 receiver 及 servos 都唔郁。

其後檢查,發覺其中一塊銅片竟與電池分離!我估我最後一 cell,就咁用兩塊銅片「凌空」焊著其正、負極當作固定,是不襟前一次降落時的震盪。似乎銅片在半空幾乎完全分開,僅連接的部分不足讓足夠電流驅動摩打(但幸好夠推動遙控),而此僅連接的部分,也在降落時震開了,以致其後無控。

一呃冷汗。


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 Post subject: 大電流摩打可能
PostPosted: 29 Feb 2004 11:18 pm 
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Joined: 26 Feb 2004 10:52 pm
Posts: 587
Location: Shatin
假如電池預計會過很大電流,大家千萬要留意電池焊片之厚度和焊點面積。我的2M機自從用了05 Cobalt摩打後,便出現很多問題。有一次還失控撞機。事後才發覺由於電流太大,電池間之原裝點焊電池片給大電流之高溶化了。回家後將其餘無問題之大電全部拆散,才發覺很多片已發黑。
現在我已將電池全部橫放,用厚片從新焊接。
有些電變如個過電流太大,在Cut摩打時可能有兩秒鐘完全失控。Cut摩打後一切又會回復正常。大家可用下面之方法試電變。
用一只快用完之電池,開摩打至全速然後用遙控推動各Servo,留意Servo在Cut電時之動作,若有一兩秒之失控現象,便是電變負荷過大或電池片有問題。要用一個更大負荷量之電變或另加一組細電給遙控。


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 Post subject:
PostPosted: 01 Mar 2004 12:05 am 
即使有 BEC,「電變」的說明書,仍有講當 cell 數超過某數目時,只可用 2 個 servos。若 cell 數少個該數目,就最多可用 4 個。

Ken,你是否在高電壓下,用過多 servo?


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 Post subject:
PostPosted: 01 Mar 2004 12:43 am 
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Joined: 26 Feb 2004 10:52 pm
Posts: 587
Location: Shatin
Willy,
問題出在平價電變質量差。


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