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How to connect a presure sensor switch ?
http://www.rcsail.com/forum/viewtopic.php?f=3&t=233		 Page 1 of 1
Author:  K.Y.Mak [ Sun Aug 22, 2004 10:26 pm ]
Post subject:  How to connect a presure sensor switch ?
I'm using my home build vacuum system for the first time. Since it didn't have the vacuum switch fitted, I have to use a timer switch to turn on the pump every 2 hours !

The switch I had came with the following wiring diagram, which I don't understand.

'
'...............o----(3)
'
'
'
'...(1) ----o
'............\
'.............\
'..............\
'...............o----(5)
'
How am I supposed to connect it with the pump and the mains?

Please help!
Author:  Y C Lui [ Sun Aug 22, 2004 10:37 pm ]
Post subject: 
阿麥﹐也你買左個真空開關咁耐都仲未用過咩 ? 有無牌子同型號 ? 等我上網睇下.
Author:  K.Y.Mak [ Sun Aug 22, 2004 11:28 pm ]
Post subject: 
Y C Lui wrote:
阿麥﹐也你買左個真空開關咁耐都仲未用過咩 ? 有無牌子同型號 ? 等我上網睇下.


係呀! 個真空pump都係第一次bag野 :oops:

個 swith 係 Saginomiya 既 SNS-C106X
www.saginomiya.co.jp
Author:  CM Cheng [ Sun Aug 22, 2004 11:31 pm ]
Post subject: 
阿麥，係唔係開始整機預備手擲機賽?
Author:  K.Y.Mak [ Mon Aug 23, 2004 12:14 am ]
Post subject: 
CM Cheng wrote:
阿麥，係唔係開始整機預備手擲機賽?


CM, 你估中咗！
我依家先用輕木為隻 Salome bag 條輕D既尾。
下一次就用foam bag一隻有 airfoil 既尾。
希望可以將机頭幾拾gram ballast 除去 :roll:
Author:  Y C Lui [ Mon Aug 23, 2004 12:22 am ]
Post subject: 
阿麥﹐根據產品資料 http://www.saginomiya.co.jp/english/e_catalog/folder/P013P014.PDF

你個真空開關既 contact function 係 diagram 1 所描述個種。呢種開關睇落係機械式﹐所以本身唔需要用電﹐你當係普通開關咁接落個真空泵就得架啦﹗個開關既操作係咁﹕

當個袋由於漏氣﹐入面既壓力升到你預設既上限時﹐接點(1)同(3) 就會通電﹐(1)同(5)就斷開﹐呢個時候你應該聽到個開關發出"得"一聲。你要用呢個開關動作開著個真空泵﹐抽D氣出黎﹐令袋入面既壓力下降

到個袋既壓力降到你預設既下限時﹐接點(1)同(3) 就會斷開﹐(1)同(5)就通電﹐呢個時候個開關又會發出"得"一聲。如果接線無錯﹐個真空泵就會停。

所以你需要用既只係接點(1)同(3)﹐接點(5) 可以不理。
Author:  K.Y.Mak [ Mon Aug 23, 2004 1:06 am ]
Post subject: 
Y C Lui wrote:

所以你需要用既只係接點(1)同(3)﹐接點(5) 可以不理。


I see !
咁就係將條火線由电源接入(1)，然後再由(3) 通到個pump既火線位。水線就跳過個switch，直入個pump既水線位。
咁地線就接落個鐵盒上面！
唔該呀YC :)
Author:  PatrickYellow [ Mon Aug 23, 2004 1:04 pm ]
Post subject: 
YC, acording to your tips to do the vacuum, it suppose no leak after vacuum, is that right?
Patrick

Ah Mak, you finally start to build, waht a BIG STEP :!: :!: :!:
Author:  Y C Lui [ Mon Aug 23, 2004 2:17 pm ]
Post subject: 
PatrickYellow wrote:
... it suppose no leak after vacuum, is that right?


Hi Patrick,

呢種裝置係要黎應付真空袋一般存在既漏氣問題。個真空開關不斷度著個袋既真空度﹐一唔夠就開泵﹐一夠就停泵。我用緊個泵大約每 20 分鐘開 3 秒就足夠保持真空度。阿麥﹐搞掂個開關後應該唔駛再用你搵 PVC 管整個個 vacuum reservior 啦。
Author:  K.Y.Mak [ Tue Aug 24, 2004 12:49 am ]
Post subject: 
Y C Lui wrote:
PatrickYellow wrote:
... it suppose no leak after vacuum, is that right?


Hi Patrick,

呢種裝置係要黎應付真空袋一般存在既漏氣問題。個真空開關不斷度著個袋既真空度﹐一唔夠就開泵﹐一夠就停泵。我用緊個泵大約每 20 分鐘開 3 秒就足夠保持真空度。阿麥﹐搞掂個開關後應該唔駛再用你搵 PVC 管整個個 vacuum reservior 啦。


YC,
今晚巳經測試咗個真空switch. 唔夠壓力會自動開‧到左預設壓力就自動停 :)
不過因為個switch係正負壓倆用，負壓一邊只有指表的一半行程，唔係咁準！要用個正式負壓表泥試所需既壓力。
我個 vacuum reservor 一早已經整好左。都有用架！倆三個鍾開幾秒就足夠保持真空度 :o
Author:  Martin Liu [ Tue Aug 24, 2004 11:44 am ]
Post subject: 
大家好，我想問vacuum pump係邊處有得賣同幾銀呢？
謝謝 :)
Author:  Y C Lui [ Tue Aug 24, 2004 2:11 pm ]
Post subject: 
市面上D真空泵都幾貴﹐我都唔敢介紹﹐我依家用緊個真空泵係我以前用黎噴油既風泵﹐有日無意發覺入氣個位可以用黎抽氣﹐仲可以抽到接近全真空(27 吋水銀),個泵停左後D氣又唔會倒流﹐所以我就用左佢黎做真空泵。

要整套又平又正既真空系統﹐就真係要參考阿麥個套 DIY 。詳情留番阿麥介紹。
Author:  K.Y.Mak [ Tue Aug 24, 2004 10:37 pm ]
Post subject: 
隻 Salome 既兩張尾版已經 bag 咗出泥，
分別係 6.6g 同 7.5g

相信係選既料實在係太輕，好唔夠力！
Author:  Henry Chan [ Wed Aug 25, 2004 2:31 am ]
Post subject: 
http://www.roarockit.com/us/proddetail.php?prod=01320

呢舊野賣US$120, 話可以抽到26hg, 唔知羅黎bag bag得唔得呢?
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