Calibrating a bicycle 'computer'..

Submitted: Tuesday, Jun 01, 2010 at 11:31
ThreadID: 78959 Views:7616 Replies:6 FollowUps:10
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I've fitted a simple bike speedo thingy on the 'co driver's side so she can call of distances when required.
For information- it runs off the rear tailshaft out of the transfer box.
Anyhow- I've misplaced (read: lost) the setup instructions. It's a simple 2 button job (brand Adura) and it's something like hold the botton down and set this- then set that ??
Would anyone (especially cyclists) give me a clue how to calibrate it?? I do realize it won't be like a bike where you set up the wheel circumfrence (as there is diff ratios etc involved)- but I aim to calibrate the speed with the GPS which should then be OK for distances !! (if ya know what I mean)..
Thanks




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Reply By: ExplorOz - David & Michelle - Tuesday, Jun 01, 2010 at 11:58

Tuesday, Jun 01, 2010 at 11:58
Sorry, you lost me! I'm a do it all by the book type of gal! Have you tried looking for the manual on the net?
MM
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Follow Up By: Member -Signman - Tuesday, Jun 01, 2010 at 12:02

Tuesday, Jun 01, 2010 at 12:02
Thanks Michelle- Yup, checked out the 'net.
I think they were distributed by Apollo Cycles- so may give them a call. !!
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Reply By: Member - Graham H (QLD) - Tuesday, Jun 01, 2010 at 12:03

Tuesday, Jun 01, 2010 at 12:03
My GPS gives me distance to turns up to a k away so why do you need that

You could go back to where you bought it and ask them to copy the instructions out of another one.
Or as David says try the net



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Follow Up By: Member -Signman - Tuesday, Jun 01, 2010 at 12:19

Tuesday, Jun 01, 2010 at 12:19
That one sounds good Graham..
so when you're on the Canning Stock Route, the GPS will 'tell' you how far to the next Well or intersection ??

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Follow Up By: Member - Graham H (QLD) - Tuesday, Jun 01, 2010 at 12:49

Tuesday, Jun 01, 2010 at 12:49
As you didnt fully explain where you wanted the distances it wasnt a stupid answer.

The more info you provide the better the answers.

We cant read your mind , only what you write

Ask Doug he will know which GPS may do what you want


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Follow Up By: Robin Miller - Tuesday, Jun 01, 2010 at 19:17

Tuesday, Jun 01, 2010 at 19:17
Hope you get it going - but check out the GPS option if you can , once driving rallies I used to do the tailshaft thing but mud and wheelspin caused havoc.

GPS'es like the 276c I use can navigate every signal little user created track point - I.E. my own plot for the Canning consists of about 1700 points (average 1point per km) , and for every single point the GPS can tell you how long to get there , how far , and it what direction etc with a compass display or against a map background.

Note this is different from creating some waypoints or route points, or using
your average auto routing special.

Most GPSes can do this and pre the current rash of navigators used to have a compass display and give you data about the next waypoint - look for something like a Garmin GPS 111 from 1995 or later to play with, its a lotta fun.
Robin Miller

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Reply By: Member - mazcan - Tuesday, Jun 01, 2010 at 12:39

Tuesday, Jun 01, 2010 at 12:39
hi signman

talk about a cunnundrum
i have a cats-eye cycle computor and i am curious as to how your going to get it to work off the tailshaft of your 4wd
mine uses the circumference of the cycle wheel which is then entered via a calculation conversion factor chart
to allow it to calibrate distance and speed
so how is the spining tailshaft going a substitute for a cycle wheel to enable the bike comp to calibrate the
distance/speed acurately
are you going to use the circumference of your 4by's tyres via the conversion factor chart
i am not saying it wont work because i quiet often think outside the normal circle of possibilities
because it may well do so and and but

but
it may be easyier to get your wife to ride the bl--dy bike along the road and give her a 2way radio for communications

give her a gps for xmas instead of the tradition gift

if she wants to keep that much of a check on ya
or let her drive ?????
talk about handbrake problems
rofl lol
cheers
AnswerID: 419094

Follow Up By: Member -Signman - Tuesday, Jun 01, 2010 at 13:00

Tuesday, Jun 01, 2010 at 13:00
OK..the tail bleep is spinning consistent with road speed- no matter what gear being used.
I have a very small rare earth magnet epoxied onto the uni yoke at the rear of the transfer case. I have the 'pick up' on a bracket on the transfer case, so it lines up with the magnet. So when the tailshaft turns it sends signal to unit.
I know I have to work out the proper calibration for acccurate reading. this is where I'll use a GPS speed to calibrate the unit.
I'll play with the (wheel) calibration til the unit reads the right speed- not necessarily play with the wheel circumfrence method.
Easy Peasy !!!!
My problem is- I forget which button(s) I have to press on the unit to set the thing up..!!

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Follow Up By: Member -Signman - Tuesday, Jun 01, 2010 at 13:04

Tuesday, Jun 01, 2010 at 13:04
Strange...I wonder why the system 'bleeped' shaft...as in tail shaft ???

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Follow Up By: Member - mazcan - Tuesday, Jun 01, 2010 at 13:23

Tuesday, Jun 01, 2010 at 13:23
hi signman
thanks for imfo
i have just located my cateye mitty2 instruction book and it's a
cyclocomputor
model cc-mt200
looking at the front of it
it has 2 large buttons at the bottom edge
the 1 on the left is the mode button and the right side button is start /stop
and a small button in between the 2 just above is
the set button and/or enter button
which is depressed with the tip of a biro pen and/or a match
hope this may be of some use but maybe totally different
cheers
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Follow Up By: Member -Signman - Tuesday, Jun 01, 2010 at 13:28

Tuesday, Jun 01, 2010 at 13:28
mazcan
Thanks very much for that info. I think you may be on the right track.
I'll give it a go.
Cheers

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Follow Up By: Member - mazcan - Tuesday, Jun 01, 2010 at 13:36

Tuesday, Jun 01, 2010 at 13:36
hi signman
let me know if you want any further details from the cateye book
and also
i would like to know the end results of whether it works successfully or not
the mind boggles?
cheers good luck
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Reply By: ExplorOz - David & Michelle - Tuesday, Jun 01, 2010 at 12:48

Tuesday, Jun 01, 2010 at 12:48
Ah the calibration will be the circumference of the tyre however the rear diff is going to make this vary dependant on the ratio. So the best method will be to set the tail shaft so that the magnet is next to the pick up, mark the outside of the tyre where it touches the ground with a marker and then rotate the drive shaft through one full revolution and then mark the tyre again where it touches the ground. Now measure the distance between the two marks on the tyre by rolling it to from one mark to the next and take this distance directly into the circumference value of the bike computer and presto you should be reading the right speed.

PS: The bike computer will most likely have a reset/settings button on the back so have a look there or go the brand into Google and look for a manual.

David
David (DM) & Michelle (MM)
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Always working not enough travelling!

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AnswerID: 419096

Follow Up By: ExplorOz - David & Michelle - Tuesday, Jun 01, 2010 at 12:50

Tuesday, Jun 01, 2010 at 12:50
Just to clarify the cycle computer wants to know how far the wheel turns to make on full revolution on the pick-up - so you are measuring the distance the car travels for one full revolution of the drive shaft.
Good luck and let me know how you get on - it should work perfectly.
David
David (DM) & Michelle (MM)
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Always working not enough travelling!

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Reply By: Member - Graham H (QLD) - Tuesday, Jun 01, 2010 at 13:21

Tuesday, Jun 01, 2010 at 13:21
I googled Adura and Andura and only came up with this

http://eshop.jmjcycles.co.uk/epages/BT4149.sf/en_GB/?ObjectPath=/Shops/BT4149/Products/%22Cateye%20Enduro%208%22&ViewAction=ViewProductDetailImage

Only thing that came near

Nothing under Adura




AnswerID: 419099

Reply By: Doc - Tuesday, Jun 01, 2010 at 16:04

Tuesday, Jun 01, 2010 at 16:04
My Repco brand cycle computer gets reset when the battery is removed. When it is powered on next, it wants the date & time, and the wheel circumference re-entered. Try removing your battery.
Geoff
AnswerID: 419125

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