独り言集 令和二年九月版
拡大ルーペ 買い [English Note] [2020/09/15]
+++ 良いルーペが欲しいが +++
先日、大阪・日本橋で、面白そうなルーペを見付けたので買ってみた。(¥610税込み)
しかし、"明視の距離/焦点距離"が、数cmほどしか取れない。(図1)
これでは、私の細かい作業用には使えないではないか!
そう言えば、昔、時計屋のおじさんが、こんな眼鏡を掛けて「時計」の修理をしていたのを思い出した。
その時も、時計を眼鏡の近くまで持って来て覗いていたが、こいつもやはりそうだったか!
実は、0.5mmピッチの「コネクタ」や0.2mmの「銅線」などを扱おうとすると、倍率の高いルーペが欲しくなる。
それで、色々使い分けているのだが、いずれも倍率が高いものは、半田付けの際に、半田鏝を入れる隙間が足りなくて困るのだ。(図2[クリック])
それに、両手が使えないのも拙いので、その時には「ヘッド・ルーペ」を使うが、これも"倍率"と"隙間"との兼ね合いになる。
そこで、よく思うのは、"望遠鏡型ヘッド・ルーペ"って無いものか?と。
軽くて、視野がそこそこあって、倍率が5倍から15倍、出来れば可変で、"ルーペ"と"対象物"との距離が10cm以上で、それに安価なものが欲しい!
...でも、そんな作業を好んでするような人は、そう多くないから、商品には、し難いだろうな。
自分で作れるなら、作ってみたいが、まず無理だな。
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Expanded loupe buying [2020/09/15]
+++ I want a good magnifying glass, but +++
The other day, I found a magnifying glass that looks interesting in Nipponbashi, Osaka, so I bought it. (\ 610 including tax)
However, the "clear vision distance/focal length" can only be obtained by a few centimeters. (Fig_1)
Isn't this usable for my detailed work !
By the way, I remembered that a long time ago, an uncle of a watchmaker wore such glasses and repaired a "watch".
At that time, I brought my watch close to my glasses and looked into it, but was that so ?
In fact, when trying to handle 0.5mm pitch "connectors" and 0.2mm "copper wires", you want a magnifying glass with high magnification.
That's why I use them in various ways, but the ones with high magnification are in trouble because there is not enough space for the soldering iron when soldering. (Fig_2 [click])
Besides, I'm afraid I can't use both hands, so I use a "head loupe" at that time, but this is also a trade-off between "magnification" and "gap".
So, what I often think about is the "telescope type head loupe" ?
I want something that is light, has a decent field of view, has a magnification of 5 to 15 times, is variable if possible, is gap about 10cm, and is inexpensive !
... However, there aren't many people who like that kind of work, so it would be difficult to make a product.
If I can make it myself, I would like to make it, but it is impossible.
FPC折れ・断線 修理 [English Note] [2020/09/03]
+++ FPCが断線したのはコネクタが原因? +++
私有「PC110」の7号機:"竹"の「VGA23-TFT」化の試みで、VGA表示が上手く行って、「LCDケース」を被せた時、2つの事故が起きた。
一つは、7号機:"竹"が故障/不良化してしまったことと、もう一つは、「VGA23-TFT」のFPCの一部に断線が起き始めたことだ。(図1)
不良化の件は、別に書いたが、ここでは、FPCの断線個所を補修した件について書いておく。
FPCの断線は、それを180度まで曲げた後、また元の平らな状態にまで戻したことらしい。(図2[クリック])
FPCを180度曲げた遠因は、「PC110」の"LCD-FPC"と同じような形に真似をしたこと、及び使った「40ピン・コネクタ」が、"下ピン型"だったことがある。
もし、"上ピン型コネクタ"を使っていれば、FPCを180度曲げなくても済んだはずなので、悔やまれる。
+++ 0.2mm銅線での補修 +++
実は、この「VGA23-TFTモジュール」は、もう廃棄するしかない!とは思ったが、以前、"0.5mmピッチ線群の接続"を練習していたので、これも一度は試してみようと、修復に取り組んでみた。
FPSの被覆を剥ぐのに、百均グッズの「工芸用カッタ」の刃を、更に鋭く研いだものを使った。
出来るだけ長い範囲を剥いで銅箔部を露出させ、其処に"半田被膜"を施した。
0.2oΦの銅線は、予め被覆を剥いで、これにも"半田被膜"をしておく。
その銅線を約2mm〜3mmの長さに切って、それで断線部を接続した。
始めの1、2本は、スムーズに半田付け出来るが、その後が難しい!!(図3)
"ピンセットの保持力"が、"勝負の決め手"だろうな。苦笑)
先ず、(ピン#1,2,3,4の)4本だけを接続して、その上を「紫外線硬化接着剤」で留めた。
ところが、結果は変?画面が逆様だった!
ピン#39,40を見ると、其処も断線していたので、同じ手法で接続。
最終結果は、良好!!
6号機:"松"を使って、映像も出せた♪(図4[クリック])
でも、この様子だと、他の線群が"無傷”だとは思えない。後は、注意して使うしかないか。
しかし、まぁ、0.5mmピッチの線群の半田付けも、やれば出来るものですねぇ。
もしかしたら、Moonlightさんの元気さを、分けて貰ったのかもしれない。(感謝!)
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FPC break/disconnection repair [2020/09/03]
+++ FPC is broken due to the dirction of theconnector ? +++
Privately owned "PC110" No.7:"Bamboo" Attempted to convert to "VGA23-TFT", VGA display went well, but two accidents occurred when I covered the LCD case.
One is that No.7:"Bamboo" has failed/deteriorated, and another is One is that some of the FPCs in the "VGA23-TFT" started to break. (Fig_1)
I wrote about the case of failure separately, but here I will write about the case of repairing disconnection point of FPC.
It seems that the FPC was broken by bending it up to 180 degrees and returning it to its original flat state. (Fig_2 [click])
The cause of bending the FPC 180 degrees is that it is similar to "LCD-FPC" of "PC110", and The "40 pin connector" I used was "lower pin type".
If I was using "upper pin type connector", I wouldn't have to bend the FPC 180 degrees, so I regret it.
+++ Repair with 0.2mm copper wire +++
Actually, this "VGA23-TFT module" must be discarded anymore! I thought that, but I was practicing "0.5mm pitch line group connection"" before, so I'll try it again and repair it. I worked on.
To remove the FPS coating, I used a sharper sharpened blade from the "Craft Cutter" from Hyakune Collectibles.
I peeled off the longest possible area to expose the copper foil, and applied a "solder coating" there.
The 0.2 mmΦ copper wire is stripped of its coating in advance and a "solder coating" is also applied to it.
The copper wire was cut into a length of about 2 mm to 3 mm, and the break was connected with it.
The first one or two can be soldered smoothly, but it is difficult after that !! (Fig_3)
"Tweezer holding power" may be the "decision factor".
First, only 4 (pins #1,2,3,4) were connected and the top was fastened with "ultraviolet curing adhesive".
However, the result is strange ? The screen was upside down !
Looking at pins #39 and 40, they were also broken, so connect using the same method.
The final result is good !!
I was able to use No.6:"Pine" to create an image ♪ (Fig_4 [click])
But in this situation, I don't think other lines are "intact".
After that, I have no choice but to use it carefully.
However, well, I'll be able to solder multi lines with a pitch of 0.5 mm.
Perhaps the energy of Mr.Moonlight was shared for me. (Thanks !)