Help with building your Speeduino, installing it, getting it to run etc.
By Dmitriy
#43624
LAV1000 wrote: Thu Jun 11, 2020 3:38 pm
Dmitriy wrote: Thu Jun 11, 2020 9:05 am
LAV1000 wrote: Wed Jun 10, 2020 9:35 pm Dmitry,

The resistors R10 and R12 are parrallel to the the VR sensor and are there to get the voltage down from the vr sensor especial at higher rpm's
You might try to fit a bigger resistor.
How is the resistance of these resistors calculated?
The voltage generated by the sensor is 3-5V. It is possible that at high speeds it is higher, but I definitely don’t know.
The problem is, there are so many VR sensors each whit its own characteristics.
You need to see them as small generators each whit its own Voltage and Current range.
So voltage and current output depends on how fast your trigger wheel is turning and how many teeth it has.

Trigger wheel 36-1 turns out more voltage than a 18-1 at the same rpm.
Now to "tune" the sensor they are using resistors.

If you make the load higher, les resistance, than the voltage wil drop.
But if you make this load to big then then there isn't enough voltage to run the low rpm's.
Now for you need to find a good value for your set up
Hence the word "tuning".
R10 and R12 are 4,7kOhm at the moment, try a few values below it like 3.9-3.3-2.7-2.2 kOhm
I have not yet found any resistors of lower resistance, resistors R11,12 have soldered from the board. Without resistors, the motor works very poorly at speeds above 5000. At the moment, the motor works fine without using a VR air conditioner.
Naidu resistors try to adjust the VR air conditioner.
By Dmitriy
#43641
LAV1000 wrote: Fri Jun 12, 2020 3:45 pm Resistors should R10 and R12 and not R11.
If it runs without VR conditioner, Why would you put it back ?
I made a mistake writing R11.12.
I wanted to adjust VR, I thought it would be more correct. If you use VR on engines that develop power up to about 5000-7000 rpm, VR definitely works fine. In my case, practice has shown that it is better not to use it.
The next step is to transfer the ignition system under the control of speeduino.
It is strange that the ignition table does not see the position of the TPS. I use TPS values ​​instead of MAP.
By LAV1000
#43649
VR sensor could work.
But you need to be careful on selecting the right parts.
On cars it is a lot easier because they don't rev that high and a lot of people work on cars so there is a lot more data available of what works and what not.

Ignition and TPS .
Check setting:
Spark > Spark Settings > Ignition load source, set it to TPS.
And you need to "burn "the setting.
By Dmitriy
#43661
LAV1000 wrote: Sat Jun 13, 2020 11:12 am VR sensor could work.
But you need to be careful on selecting the right parts.
On cars it is a lot easier because they don't rev that high and a lot of people work on cars so there is a lot more data available of what works and what not.

Ignition and TPS .
Check setting:
Spark > Spark Settings > Ignition load source, set it to TPS.
And you need to "burn "the setting.
With these settings, the ignition card does not respond to TPS.
"And you need to "burn "the setting." What did you mean? I do not understand.
Attachments
Безымянный.png
Безымянный.png (184.85 KiB) Viewed 6121 times
By LAV1000
#43663
Dmitry, first of all your full name is at the top of the picture you posted, there are ways to get rid of it
By "burn" I mean you have to use the burn function, see red square.
Can you post your latest tune (.msq) file ?
Attachments
Burn.png
Burn.png (554.16 KiB) Viewed 6101 times
By LAV1000
#43665
TPS and Ignition table set up looks ok.
Only weird thing is the 0 ignition advance at 0 TPS any reason for this ?
At 0 TPS engine should be at idle speed.
Attachments
TPS-ing.png
TPS-ing.png (423 KiB) Viewed 6086 times
By Dmitriy
#43670
Does your table also ignore TPS values?
0 in the table is only for setting the moment, do not pay attention to it. (when the ignition is at 0 it is very convenient to combine marks on the crankshaft using a stroboscope.)
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