Building a speedo healer project - Kawasaki ZX-10R.net
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post #1 of 62 Old 08-28-2008, 09:10 PM Thread Starter
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Building a speedo healer project

I have a hard time paying $80 for somthing that i can build for $10-15. So I have about got it figured out. Just running it by you guys to see if anyone had any suggestions.

So far the Iíve got
The speedometer is a pulse frequency counter. With a look up table
@60 mph it needs an output of 124hz
It has a Square wave out put. @50% duty cycle

So I am planning to use a binary rate multiplier to modify the frequency of the sensor buy a % of my choice. So I can slowit down or speed it up by the % of my choice.

If i use a rate multiplier with a denominator of 64 that would give me %1.5 adjustment resolution. So the speedometer will be within .75 mph at 100 at the most.


Any suggestions?
also any intrest in them. i can build a few more if anyone wonts one when i get them working.

High Velocity Cycles 2005 Ti ZX10R
Greeensboro NC
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post #2 of 62 Old 08-28-2008, 09:22 PM
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im not good at electronics but im really good in math.
i dont believe the % of the difference is linear...

for example,
at 5mph, the error, let's say, is 3%
and at 50mph, the error is 25%
and at 103mph, the error is 17%

so setting it at only one error rate (%) will result to a wrong calculation.

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post #3 of 62 Old 08-28-2008, 09:25 PM
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maybe you can log your speedo by 1 mph interval...
then log the actual mph from a gps also with 1 mph interval..
then you can make a graph and try to find the error % at every interval.
or you can calculate the area underneath the graph to get the real miles...
then log it with your hours, then there you... the real mph!

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post #4 of 62 Old 08-28-2008, 09:46 PM
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To the OP, can you translate that to English, please?
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post #5 of 62 Old 08-28-2008, 10:36 PM
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Quote:
Originally Posted by Lucky10R View Post
im not good at electronics but im really good in math.
i dont believe the % of the difference is linear...

for example,
at 5mph, the error, let's say, is 3%
and at 50mph, the error is 25%
and at 103mph, the error is 17%

so setting it at only one error rate (%) will result to a wrong calculation.
No, it doesn't work that way. A speedohealer may be off by a percent or 2 but in general the Speedohealer is almost an exact percentage (via GPS or Radar) and will have you right on the mark almost through out the Speed range minus tire wear and any other minor factors(hence the percent or 2 ). A 6 percent error Stock without a correction(no speedohealer) becomes more evident the higher the speeds you go.

For example a 6% error @ 5mph is really 4.7mph a difference of .3mph... but 180mph with a 6% error is really 169.2mph a difference of 10.8mph and this is without a sprocket change from stock not counting tire wear or replacement.

Basically it is linear because it's only taking the pulses from your linear Speed sensor and outputting them in the proper time frame for 1 revolution.



As far as making your own Bugman, All the power to ya bugman As many know I made my own Gear Indicator and consider it the Best you CAN'T Buy for the masses.....But for this project many get last speed recall and easy programing and testing tools built in. If you can do that maybe so
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post #6 of 62 Old 08-28-2008, 11:35 PM Thread Starter
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yea the speed correction is linear. Ie
IE
With a 15/39 gearing the final ratio is ~2.3 from 2.6 stock
So that is ~%14 so the speedo will read 14mph High at 100mph
But at 50mph the speedo will read 7mph high

So if i take the original pulse frequency and subtract 15% the output will correct the speedometer.

since we are dealing with a % as the speed increased so does the correction factor.

i thought of you bluedevil when i was designing this i remember you also did a 06 Speedo swap if I remember correctly and had to multiply the pulse to work with the newer Speedo..

Do you have any schematics for the gear position indicator that would be a cool project to build.

I could include a high speed recall but it would add to the cost. i would have to use a chip with flash memory and program it.

My goal is to make it as cheap as possible and be very reliable. For a low cost option.

High Velocity Cycles 2005 Ti ZX10R
Greeensboro NC
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post #7 of 62 Old 08-28-2008, 11:40 PM Thread Starter
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as for programing it will have 6 dip switchs on the top and is set by binary code 1-63. I will make a chart so all you have to do is look up what correction you want and flip the switches.

High Velocity Cycles 2005 Ti ZX10R
Greeensboro NC

Last edited by bluedevil; 08-28-2008 at 11:54 PM.
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post #8 of 62 Old 08-28-2008, 11:41 PM
 
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Gotta be honest I'd just pay the 80 bucks....
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post #9 of 62 Old 08-28-2008, 11:43 PM Thread Starter
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Gotta be honest I'd just pay the 80 bucks....
I like a challenge though. and whats the fun in buying it of you can build it cheaper. Really it would be cheaper considering my time but hey im learning something.

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post #10 of 62 Old 08-28-2008, 11:52 PM
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Quote:
Originally Posted by bugman53 View Post
yea the speed correction is linear. Ie
IE
With a 15/39 gearing the final ratio is ~2.3 from 2.6 stock
So that is ~%14 so the speedo will read 14mph High at 100mph
But at 50mph the speedo will read 7mph high

So if i take the original pulse frequency and subtract 15% the output will correct the speedometer.

since we are dealing with a % as the speed increased so does the correction factor.

i thought of you bluedevil when i was designing this i remember you also did a 06 Speedo swap if I remember correctly and had to multiply the pulse to work with the newer Speedo..

Do you have any schematics for the gear position indicator that would be a cool project to build.

I could include a high speed recall but it would add to the cost. i would have to use a chip with flash memory and program it.

My goal is to make it as cheap as possible and be very reliable. For a low cost option.
If your talking about my Gear Positioning Indicator I am willing to sell my 35 plus boards and all the Schematics to make them just PM me for an offer.

As far as my 06 Cluster to my 04 10R the main problem was the 04 speed sensor doesn't send enough pulses for the 06 Cluster. I needed a special Speedohealer and got it. It can do up to 9999% increase but needed about 760% increase. For those that are wondering what does that mean, well the ones you buy in the US go up to 99% and that's all you need for a normal sprocket change but special projects require much more.
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