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Hi all,
Looking for recommendations to remove ignition noise that is getting into the dyno RPM encoder.
Small 2 stroke engine dyno with eddy current retarder.
Using Yourdyno data and eddy current power supply.
RPM uses a 100PPR encoder.
Noise can be seen in the picture. - https://drive.google.com/file/d/1AW6baKwEpA9Q49ClNCE6N4fe7FzxThM9/view?usp=sharing
when I turn the engine off while running the noise stops. - perfect square wave.
I have disconnected all other items on the controller. only the RPM encoder remaining and the noise is still present. so not coming in through another connection.
Thanks
Posted : 11/08/2024 3:56 pm
Here are things to try:
- Ensure your RPM cable is shielded and that shield is connected in one end only (typically at the YourDyno side)
- Avoid cable coils, use as short cables as possible
- Route cables away from noise generating cables/units
- Ground the engine/dyno stand
- Use resistorized spark plugs and RFI suppression spark plug wires
Regards,
Jostein
Posted : 12/08/2024 8:32 am