JB220 Failsafe Help
05-29-2014 | 08:53 AM
#1
Thread Starter
JB220 Failsafe Help
Hi Guys
Im wondering if any of you can be of help? I'm trying to set the failsafe on the JB220 (Projet Hornet III ECU) and I can't get it to work. I can of course use the transmitter failsafe to get the turbine to go to idle but this won't shutdown the turbine.
I really need to work out how to set the failsafe on the ECU so it goes to idle then shuts down after the pre determined time period. I have the ATV set at 135/100/100/135 which allows the learn rc system to work however if I change these it comes up with an error message.
Many thanks
Alex
Im wondering if any of you can be of help? I'm trying to set the failsafe on the JB220 (Projet Hornet III ECU) and I can't get it to work. I can of course use the transmitter failsafe to get the turbine to go to idle but this won't shutdown the turbine.
I really need to work out how to set the failsafe on the ECU so it goes to idle then shuts down after the pre determined time period. I have the ATV set at 135/100/100/135 which allows the learn rc system to work however if I change these it comes up with an error message.
Many thanks
Alex
05-30-2014 | 03:12 AM
#4
My Feedback: (14)
Alex,
I have a number of ProJets on the 18MZ. I always set them up so the span from "off" to full throttle is +/-100 (approximately .. see below) (for Futaba, the channel has to be reversed, of course).
I agree with Oli on the failsafe setting .. temporarily go to -135 or -140 ATV on the low throttle end .. then set failsafe to that "out of range" point .. then back to the -100. The Projet can be persnickety on the travel of the trim setting that differentiates "off" from idle (can't be too little or too much).
On my 18MZ setups I use the top left slider as throttle trim (change that on the function menu) so I have an analog trim like the JR systems use. I find this very convenient.
Here are my settings: Throttle trim set to LS, -20% trim rate. Throttle ATV +/- 100. This actually gives, according to the servo monitor screen, full throttle at +100, idle at -80, off at -120. Failsafe is -140. You can adjust the low throttle ATV lower than -100 if you want to make the "off" exactly -100 going back and forth from ATV to the servo monitor screen a few times, but it does not have to be.
There is a more sophisticated failsafe option within the ECU programming that you can set with the ECU control box, which I personally do not use. The few times I tried it I had strange results, and I suspected an issue with the ECU's internal programming .. but that's just an opinion. That was a long time ago and I assume the Projet gang has fixed that if it was an issue in the first place (which it may not have been). If other current Projet users are successfully using that, I'd be interested to hear. I had several uncommanded engine shutdowns when I used this setting, and since discontinuing its use I have had none. All were on the ground, no harm done.
Dave
I have a number of ProJets on the 18MZ. I always set them up so the span from "off" to full throttle is +/-100 (approximately .. see below) (for Futaba, the channel has to be reversed, of course).
I agree with Oli on the failsafe setting .. temporarily go to -135 or -140 ATV on the low throttle end .. then set failsafe to that "out of range" point .. then back to the -100. The Projet can be persnickety on the travel of the trim setting that differentiates "off" from idle (can't be too little or too much).
On my 18MZ setups I use the top left slider as throttle trim (change that on the function menu) so I have an analog trim like the JR systems use. I find this very convenient.
Here are my settings: Throttle trim set to LS, -20% trim rate. Throttle ATV +/- 100. This actually gives, according to the servo monitor screen, full throttle at +100, idle at -80, off at -120. Failsafe is -140. You can adjust the low throttle ATV lower than -100 if you want to make the "off" exactly -100 going back and forth from ATV to the servo monitor screen a few times, but it does not have to be.
There is a more sophisticated failsafe option within the ECU programming that you can set with the ECU control box, which I personally do not use. The few times I tried it I had strange results, and I suspected an issue with the ECU's internal programming .. but that's just an opinion. That was a long time ago and I assume the Projet gang has fixed that if it was an issue in the first place (which it may not have been). If other current Projet users are successfully using that, I'd be interested to hear. I had several uncommanded engine shutdowns when I used this setting, and since discontinuing its use I have had none. All were on the ground, no harm done.
Dave
Last edited by ww2birds; 05-30-2014 at 03:15 AM.
