ofna failsafe
but it sucks.
09-10-2003, 07:54 AM
#4
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RE: ofna failsafe
If it's on Solid - BAD [:'(] if it's flashing - OKAY [sm=thumbup.gif]...[link=http://www.ofna.com/failsafe-micro.html]OFNA Failsafe[/link]
ok, i got scared there....
09-10-2003, 05:05 PM
#8
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RE: ofna failsafe
Don't know why you would need it.
The failsafe is made to protect against the throttle being left open due to two conditions:
1) Battery pack voltage no longer high enough to drive the receiver/servo (The failsafe won't allow you to get low enough)
2) Faulty/absent signals to the throttle servo, due to interference or other problem, e.g. Tx dies. (The failsafe senses the faulty, or absent, wavetrain to the servo)
On an electric using battery power through the ESC, #1 is not a problem because if you don't have power to run the servo, you're likely just turning very slow circles.
For the second condition, I'm not sure, but I thought the ESC REQUIRES a consistent set of pulses from the receiver to maintain current to the motor. If it doesn't receive pulses, it goes to "idle", which is settable on the ESC.
A simple test to see if you need it:
Put your car on a stand and bring it to partial throttle, then switch your Tx off. If it continues to run, then the failsafe could help. If it stops, you probably don't need the failsafe.
The failsafe is made to protect against the throttle being left open due to two conditions:
1) Battery pack voltage no longer high enough to drive the receiver/servo (The failsafe won't allow you to get low enough)
2) Faulty/absent signals to the throttle servo, due to interference or other problem, e.g. Tx dies. (The failsafe senses the faulty, or absent, wavetrain to the servo)
On an electric using battery power through the ESC, #1 is not a problem because if you don't have power to run the servo, you're likely just turning very slow circles.
For the second condition, I'm not sure, but I thought the ESC REQUIRES a consistent set of pulses from the receiver to maintain current to the motor. If it doesn't receive pulses, it goes to "idle", which is settable on the ESC.
A simple test to see if you need it:
Put your car on a stand and bring it to partial throttle, then switch your Tx off. If it continues to run, then the failsafe could help. If it stops, you probably don't need the failsafe.
09-10-2003, 08:24 PM
#9
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RE: ofna failsafe
The instructions for my ofna failsafe say that the flashing light means the battery is low, but mine flashes when the pack is fully charged. I emailed Ofna about this, but their wonderful support people never responded. Next time, I'll get another Venom.
09-10-2003, 10:11 PM
#10
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RE: ofna failsafe
Hey Crackerjack, if you read my post up above, you'd see a link to OFNA's online documentation for the failsafe. If your failsafe is flashing, then it is working fine. The instructions that came with mine also contradicted this but the online docs confirm it. I always refer to the online docs if possible. They're usually more up to date than packaged instructions.
