*puke* Look at that grren goo!!!!!
Charlie
ETX mount issues
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acc
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Hi Weixing, eh ur guess is wrong... 
The black disc was not present in earlier models; its probably a recent addition by Meade to prevent the wires from being chewed up by the gear assemblies that lie underneath it... 
This has happened before to some unfortunate owners...
Eu-wen, the optical encoder is coupled directly or adjacent to the shaft of the motor. Its a small, fragile wheel with radial spokes like a miniature propeller. If ur ETX is not having MUF error, then there's no need to clean it and risk damaging it.
The black disc was not present in earlier models; its probably a recent addition by Meade to prevent the wires from being chewed up by the gear assemblies that lie underneath it... This has happened before to some unfortunate owners...Eu-wen, the optical encoder is coupled directly or adjacent to the shaft of the motor. Its a small, fragile wheel with radial spokes like a miniature propeller. If ur ETX is not having MUF error, then there's no need to clean it and risk damaging it.
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weixing
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Hi,
You mean Meade use an encoder wheel??? Ooh man...
!!!! I thought only those product that price at a low cost use these type of encoder wheel, such as Computer Mouse, but actually I'm not surprise... why ???? Look at those cheap gear box... it look like those use by tamiya car.... 
By the way, I initially thought the encoder is inside the black disc, because those wires really look like wires for the encoder.... I never thought that a equipment cost a few thousand can use such cheap encoder and gears...
Anyway, wish you good luck with your Meade ETX Mount...
You mean Meade use an encoder wheel??? Ooh man...
!!!! I thought only those product that price at a low cost use these type of encoder wheel, such as Computer Mouse, but actually I'm not surprise... why ???? Look at those cheap gear box... it look like those use by tamiya car.... By the way, I initially thought the encoder is inside the black disc, because those wires really look like wires for the encoder....
I never thought that a equipment cost a few thousand can use such cheap encoder and gears... Anyway, wish you good luck with your Meade ETX Mount...
Yang Weixing
"The universe is composed mainly of hydrogen and ignorance."
"The universe is composed mainly of hydrogen and ignorance."