2.4Ghz radio control

[typhoon_driver]

2.4Ghz radio control

Cheers Kenny. Looks as though the problem is solved.

[leorcc]

2.4Ghz radio control

that might also explain why recalibrating on the sidewinder works. Because after calibration the sidewinder will then give 100% at the 100% level set on the spektrum, instead of only 80% from the factory settings.

So in short, its a spektrum issue, not a speed controller issue, but some speed controllers do have a fix for it. taking the servo adjust to 125% is a good workaround.

Would you need to have spektrum mixing active to do that?

[woody]

2.4Ghz radio control

I also had an issue with the Spectrum at Hemel.

I had many teething problems with the bot itself ...I used a normal Futaba 40Mhz on the Saturday ( burnt out a speedo and some reception issues plus cr*p driving ) and changed over to a Spekky on Sunday.

I powered up in the Arena ...moved away and the bot fired ..... settled ..and continued to fire intermitently throughout the fight.

Futher investigation showed something that I should really have noticed.. the switch ( Pico ) was very very close to ON with the stick centered ....so close in fact that it was indeed ON sometimes.
This was easily fixed by trimming away.

The fault.. if it can be called that... could have been extremely dangerous and I hope that I remember the fix if I ever have to borrow a transmitter.

[leorcc]

2.4Ghz radio control

is there no pot on the switch that you can adjust the point of switching on? Robbe switches have those.

[mightymouse]

2.4Ghz radio control

On writing software for an 08m picaxe chip I discovered that the neutral position of the spectrum reciever is roughly 1.4ms as compared to the neutral of 1.5ms on the futaba 40mhz.

This would account for the need to offset your trims and the need to set the stick movement to 125%.

I also found that the Ian Inglis control board that I have used for many years would not accept an output from the spectrum reciever. The problem was solved by reading the output into a Picaxe08m adding 0.1ms and re-broadcastng the signal. It also worked by putting a GWS FS1 failsafe in the line.

Trev

[woody]

2.4Ghz radio control

Cheers Trev,
That explains it!

Nearly forgot ..... @ Leo ...no trim pot that Ive seen.

(Message edited by woody on September 07, 2007)

[leorcc]

Re: 2.4Ghz radio control

I just received some interesting information that a German roboteer has tested and it works.

Apparently there are 2 ways of binding and programming an AR7000. One is useless for robots because it would only failsafe the throttle channel in a pre-programmed position, but the second (not documented) way will set a preset position for all channels, just like the BR6000.

If you plug in the bind plug, power up the tx and then take the bind plug off(!) while turned on, it will set itself for accepting programming on all channels.

Then set your DX6i or DX7 sticks, switches and trims in the right postition and switch on the transmitter in bind mode (either the button on the back or the trainer switch). Once the AR7000 starts blinking all the settings are saved and the bind process is accomplished. Turn of the RX and TX and test your settings.

I have not tested this process myself since I have no AR7000 but the source is very reliable.

FYI