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炭刷一問

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1#
ansonlau 發表於 2009-2-11 22:46:53 | 只看該作者 回帖獎勵 |倒序瀏覽 |閱讀模式

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請問各位師兄個炭刷要換未 ?
2#
kiev 發表於 2009-2-11 22:54:14 | 只看該作者
sure la ~~~

但有冇淨換刷先 ?
3#
Wayne~~ 發表於 2009-2-11 23:05:41 | 只看該作者
要換架喇~~!
4#
仲哥仔 發表於 2009-2-11 23:34:31 | 只看該作者
换啦!!接受吾到啊。
5#
啊永 發表於 2009-2-12 02:05:52 | 只看該作者

回復 1# 的帖子

比我早就换了,甘样会影响驾驶的
6#
billy86che 發表於 2009-2-12 08:24:26 | 只看該作者
You can achieve a better result if you use 2 of the one shown on picture DSC_0705 because it can ensure a correct angle of the point of contact with the commutator. That is, if you buy one pack of ATX brushes which contains 2 pairs, you use those for the positive pole. The negative brushes can be reserved for later use because the tip of the brush can be removed and replaced.

[ 本帖最後由 billy86che 於 2009-2-12 09:15 編輯 ]
7#
2slow 發表於 2009-2-12 10:18:45 | 只看該作者
原帖由 billy86che 於 2009-2-12 08:24 發表
You can achieve a better result if you use 2 of the one shown on picture DSC_0705 because it can ensure a correct angle of the point of contact with the commutator. That is, if you buy one pack of ATX ...


Do you mean using both positive brushes? can you elaborate more? thanks
8#
billy86che 發表於 2009-2-12 11:18:36 | 只看該作者
原帖由 2slow 於 2009-2-12 10:18 發表


Do you mean using both positive brushes? can you elaborate more? thanks


Your first question: Yes, I meant that.
Your Second question: What do you want me to elaborate?
9#
scalpel 發表於 2009-2-12 12:23:54 | 只看該作者
原帖由 billy86che 於 2009-2-12 08:24 發表
You can achieve a better result if you use 2 of the one shown on picture DSC_0705 because it can ensure a correct angle of the point of contact with the commutator. That is, if you buy one pack of ATX ...


You mean take the 2 positive brushes from the 2 pair of brushes? Then put them on positive side and negative side on the motor?
10#
2slow 發表於 2009-2-12 12:43:26 | 只看該作者
原帖由 billy86che 於 2009-2-12 11:18 發表


Your first question: Yes, I meant that.
Your Second question: What do you want me to elaborate?


elaborate on how does this help on the motor's performance? I mean the correct angle thing?
and on how will the brushes looks like? do you have any photo? coz I wanna try it~ thanks
11#
billy86che 發表於 2009-2-12 13:38:27 | 只看該作者
原帖由 scalpel 於 2009-2-12 12:23 發表


You mean take the 2 positive brushes from the 2 pair of brushes? Then put them on positive side and negative side on the motor?


Exactly. Of course you have to solder the wire to one of the brushes on another point.
12#
scalpel 發表於 2009-2-12 14:17:56 | 只看該作者
原帖由 billy86che 於 2009-2-12 13:38 發表


Exactly. Of course you have to solder the wire to one of the brushes on another point.


Oh! That's what I am doing already! When the brushes wear out, then u can take the brushes off from the spare -ve brushes....then put them back onto the current +ve and +ve end....

[ 本帖最後由 scalpel 於 2009-2-12 14:20 編輯 ]
13#
billy86che 發表於 2009-2-12 14:31:13 | 只看該作者
原帖由 2slow 於 2009-2-12 12:43 發表


elaborate on how does this help on the motor's performance? I mean the correct angle thing?
and on how will the brushes looks like? do you have any photo? coz I wanna try it~ thanks


Here it is:
14#
scalpel 發表於 2009-2-12 14:44:13 | 只看該作者
原帖由 billy86che 於 2009-2-12 14:31 發表


Here it is:


That's it, thanks for your explanation!
15#
2slow 發表於 2009-2-12 14:47:54 | 只看該作者
原帖由 billy86che 於 2009-2-12 14:31 發表


Here it is:


I see, just what I'm expecting to see, brushes in a "69" position...  thanks

how about the magnets? any twist or tricks on the magnets too? Specially in relation with the brush trick

[ 本帖最後由 2slow 於 2009-2-12 14:49 編輯 ]
16#
billy86che 發表於 2009-2-12 22:34:13 | 只看該作者
原帖由 2slow 於 2009-2-12 14:47 發表


I see, just what I'm expecting to see, brushes in a "69" position...  thanks

how about the magnets? any twist or tricks on the magnets too? Specially in relation with the brush trick


Not much, just 2 if you are using silver magnets:
1. They can be weakened if overheated. Sometimes I prefer weaker silver magnets if the straights are long.
2. If the magnets are not strong enough, add some double-sided tapes between the magnets and the motor case to reduce their distance from the rotor. It raises the torque to a certain extent.
17#
 樓主| ansonlau 發表於 2009-2-13 09:17:14 | 只看該作者
好多謝各位師兄回覆同o甘多寶貴意見

Billy 師兄, 好多謝你教o左我 lee 個方法, 小弟新手一名正於摸索嘗試中

18#
2slow 發表於 2009-2-13 09:25:02 | 只看該作者
原帖由 billy86che 於 2009-2-12 22:34 發表


Not much, just 2 if you are using silver magnets:
1. They can be weakened if overheated. Sometimes I prefer weaker silver magnets if the straights are long.
2. If the magnets are not strong enou ...


Thanks Billy for the tips and answering my doubts...
1. trying to figure why the weaker magnets for long straights, is that it provides less drag? sure it does affects the momentum of the car but then the torgue could be lessen too, right?
2. Mmm.. I should try this one. by the way, I'm not sure if the 2 magnets in the motors have different poles, how about reversing the magnets? does it helps?
19#
billy86che 發表於 2009-2-13 09:40:00 | 只看該作者
原帖由 2slow 於 2009-2-13 09:25 發表


Thanks Billy for the tips and answering my doubts...
1. trying to figure why the weaker magnets for long straights, is that it provides less drag? sure it does affects the momentum of the car ...


Reversing the magnets without doing other things reverse the spinning direction of the rotor. People do that sometimes because they "re-wind" the rotor in another direction. Most motors sold are winded "anti-clockwisely", so the red magnet is usually on the right if you remove the endbell and look inside. So if some winds the motor "clockwisely", they may either trade the position of the magnets or the wires.
20#
2slow 發表於 2009-2-13 10:47:58 | 只看該作者
原帖由 billy86che 於 2009-2-13 09:40 發表


Reversing the magnets without doing other things reverse the spinning direction of the rotor. People do that sometimes because they "re-wind" the rotor in another direction. Most motors sold are w ...


Mmm..so it merely reverse the spinning direction, no improvements on the motor..
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