Tachref sees nothing, but TunerStudio sees RPM?
Posted: Wed Jul 16, 2014 5:49 am
Hello!
So I finally got an 18-1 tooth trigger wheel installed for my project and a VR sensor off a Yamaha YFZ450. (Bench test setup, simply cases, a crank to spin by hand, the trigger wheel, and a VR sensor) I fought with it for a while Monday night, but was unable to get a signal to show up in Tachref. I tried again last night and noticed something interesting. Still seeing nothing in Tachref, I went back and re-read the info page on it to see if I was missing something.
I noticed the part where it said that if I didn’t start cranking within 2s, the test would halt and I would have to start it manually again. To test that Tachref was working correctly, I started the test and did nothing. Sure enough, 2s later, the test halted. Then I started spinning the crank and hit start again. This time, despite not drawing anything, as long as I spun the crank, the test continued, and it stopped once I stopped turning the crank, exactly as it should have.
Clearly, the Microsquirt was seeing something, I’m not just sure what as Tachref won't draw anything. So I re-flashed and loaded 3.830 and opened tuner studio, set up all the appropriate trigger wheel info, and started cranking by hand. TunerStudio registered the RPM like nothing was wrong! Cranking by hand, varying the speed, I could get it to see anything from around 70 RPM up to around 300 before I couldn't spin it any quicker. It certainly seems to be working correctly in TunerStudio.
I'm certainly happy to be making some progress. It seems from what I’m seeing in TunerStudio, that I may have a viable crank signal, now I just need to find a suitable VR sensor that will fit under the side cover… Any idea why I can’t see anything in Tachref? I tried a search but didn't see where this had been discussed in the past.
Thanks!
-Walt
So I finally got an 18-1 tooth trigger wheel installed for my project and a VR sensor off a Yamaha YFZ450. (Bench test setup, simply cases, a crank to spin by hand, the trigger wheel, and a VR sensor) I fought with it for a while Monday night, but was unable to get a signal to show up in Tachref. I tried again last night and noticed something interesting. Still seeing nothing in Tachref, I went back and re-read the info page on it to see if I was missing something.
I noticed the part where it said that if I didn’t start cranking within 2s, the test would halt and I would have to start it manually again. To test that Tachref was working correctly, I started the test and did nothing. Sure enough, 2s later, the test halted. Then I started spinning the crank and hit start again. This time, despite not drawing anything, as long as I spun the crank, the test continued, and it stopped once I stopped turning the crank, exactly as it should have.
Clearly, the Microsquirt was seeing something, I’m not just sure what as Tachref won't draw anything. So I re-flashed and loaded 3.830 and opened tuner studio, set up all the appropriate trigger wheel info, and started cranking by hand. TunerStudio registered the RPM like nothing was wrong! Cranking by hand, varying the speed, I could get it to see anything from around 70 RPM up to around 300 before I couldn't spin it any quicker. It certainly seems to be working correctly in TunerStudio.
I'm certainly happy to be making some progress. It seems from what I’m seeing in TunerStudio, that I may have a viable crank signal, now I just need to find a suitable VR sensor that will fit under the side cover… Any idea why I can’t see anything in Tachref? I tried a search but didn't see where this had been discussed in the past.
Thanks!
-Walt
