JD Cycles, Ilkley
 
 
Shimano Wireless Flightdeck Interference
Posted: 27 June 2007 11:58 AM  
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We have a wireless Shimano Flightdeck on the front of the Landescape along with a B & M Oval Senso Plus headlight which uses an LED.

I have discovered that when the LED is lit the speed and distance readings of the Flightdeck don’t function.Obviously there is some interference of the computer signal between the sensor on the front fork and the head unit caused by the LED.

I wondered if anyone else had had this problem and if they overcame it as it has me stumped at the minute or is it,as I suspect, something we will have to put up with.

Ian

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Posted: 01 July 2007 11:46 AM  
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Replying to my own post here,bad form really.

I was in two ( three?? ) minds whether the interference was arising from the Schmidt hub,the wiring or the LED.After a rummage around on the net it seems that the failure of wireless computers due to interference from LED or HID bulbs is pretty well known ( except by me of course ).

Having ascertained the source I don’t think there is anything to be done about it as shielding the light isn’t really practical and I can’t move the sensor any farther away.

Well you live and learn.

If I discover a cure I will post back.

Ian

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Posted: 01 July 2007 12:22 PM  
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Hi Bosun

Just recently we have had a customer who has had the same problem as you, this is all fairly new territory.  No suggested solutions as yet, but if we find one we’ll let you know.

Regards
Ruth

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Posted: 01 July 2007 12:26 PM  
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Ruth,

I have e-mailed B & M to ask their advice,I don’t hold out much hope and it is not a big problem really but I must admit I like things to “work” if you know what I mean.

If I get a reply I will post the outcome.

Nice to know that someone else has it !!

Ian

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Posted: 02 July 2007 04:02 AM  
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I received the following reply from B & M about the computer interference problem:-

The reason for the disturbance of the wireless computer is the pulsing of the LED of the head light together with the very large spectrum of frequency of many computers. Unfortunately there is no other possibility than to have a great distance between both instruments or to use a wired computer.

I also read somewhere that the shorter the distance between the computer head unit and the sender the better it is.I have had the sender threequarters the way down the right fork and have now moved it to the top of the left to give a shorter sender/headunit distance.The LED interfered in both positions so I will leave it where it is.I think this “great distance” that is mentioned must be a lot further than is practical for the sender unit to be.I did think of placing the sender on the rear wheel but the FlightDeck instructions say the sender/head unit should be within about 50cm of each other so that is out.

I have e-mailed B & M back to ask them what the distance is,bearing in mind it may be different for different computers.I will post back when I get a reply

It is one of those things that we shall have to learn to live with.It could be worse,at least we haven’t been flooded.

Ian

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Posted: 17 July 2007 04:48 AM  
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As promised here is the last word from B & M regarding the LED/computer problem.

My collegue is back from holiday today but unfortunately he hasn’t any test results concerning LED-headlights and different computers.

So that is that,no solution forthcoming apart from separation which appears impractical.
Ian

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