Originally Posted by
viva_peru
Hello all,
First of all, Happy Easter! I have spent some time trying to program a new Jeti Spin ESC and for some reason I am having a difficult time with the throttle end points, particularly the low end point. This is what I have done so far:
1) I used the Jeti Spin Box to measure the throttle end points and got 1.14 ms and 1.92 ms for the low and high ends (Spektrum radio)
2) I then programmed those values using the Spin Box under the fixed end points option
3) The motor will not run nor does the ESC give me the startup beep.
For the transmitter, the throttle travel is set to 100% both up and down with no subtrim nor regular trim being used. I have played with the low end point and I can get the motor to run if I set it to 1.30 ms, but it requires about 1/3 throttle stick movement before the motor starts up. If I use the Auto setting on the low end point, the motor will run, but again, it requires about 1/3 throttle stick movement before the prop spins. Ideally, I would like to have it set-up where a little stick movement is enough to get the prop spinning at low RMP. Given the size of the"Dead band" I am also wondering how it will affect the operation of the brake.
Any suggestions would be greatly appreciated.
Thanks,
Teo
I've written about this many times and I never can find it to pass on so I guess I'll have to try to say it again.
First thing when setting up an electric plane is you must have a throttle cut. I assume your transmitter has a Throttle Cut function that disables the throttle stick when you have it in the cut position. Here is what I do. Set the Spin end points to 1.0 or 1.1 msec on the low end and 2.0 on the high end. Set your Throttle cut so the output is something much lower than the Spin low end point, like 0.9 msec. Set the throttle channel so full throttle gives you 2.0 msec and low gives you something just over the low setting, 1.05 or 1.15. You will fine tune the low end with throttle trim to get a good idle.
Turn on the transmitter first with the throttle stick at the low end and the Throttle Cut not cut. Turn on the receiver and the ESC should not arm as the pulse width is above your low end setting in the Spin. Turn the Throttle Cut on and the ESC will arm as the pulse width is below the low end setting. Turn the Throttle Cut off and the motor should start at idle. Go fly.
Some motor/ESC combinations will not start at idle so you might need to jog the throttle stick to start the motor but it should idle when you pull the stick back.
Once it is armed be very careful not to go from throttle cut to motor on if the throttle stick is not all the way down to the idle position.
Jim O