Cookson Posted June 14, 2012 Share Posted June 14, 2012 I tried a search but didn't come up with anything, so sorry if this has already been covered. I have a Futaba 9Z & have converted it using a Futaba 2.4Ghz module. To run this the 9Z has to be set to PPM mode, now that it is in PPM it appears that I cannot set the F/S, on checking the manual it says that this feature is only available in PCM. On my WOT4 XL if I turn off the tranny the throttle instead of going to idle, goes to full throttle & I have a 26cc Gas engine in it !!! I now feel that this model cannot be flown safely. Am I missing something. Quote Link to comment Share on other sites More sharing options...
Bob Cotsford Posted June 14, 2012 Share Posted June 14, 2012 Can you set the failsafe from the receiver? I've not used Futaba plug in modules, but those brands I have used the failsafe is set by depressing the rx bind button with the surfaces set to the required positions. Quote Link to comment Share on other sites More sharing options...
Steve Hargreaves - Moderator Posted June 14, 2012 Share Posted June 14, 2012 Well SOMETHING seems to be happening Cooko if the servo moves to full throttle.....which Rx are you using....? The genuine Fuby 617 only has failsafe on the throttle & is set from the Tx......the FrSky clone has failsafe on all 7 channels & is set from the Rx..... As the good Bob says I haven't used the modules either so not fully conversant with them.... Quote Link to comment Share on other sites More sharing options...
Cookson Posted June 14, 2012 Author Share Posted June 14, 2012 There are no instructions as such with the RX, I'll check the module instructions. Quote Link to comment Share on other sites More sharing options...
Cookson Posted June 14, 2012 Author Share Posted June 14, 2012 Using gen 617 RX Quote Link to comment Share on other sites More sharing options...
Thomas Barwick Posted June 14, 2012 Share Posted June 14, 2012 I have looked at this many times on my 10cg. And it does look like Failsafe can't be set in ppm mode. I use external failsafes when in ppm mode. Quote Link to comment Share on other sites More sharing options...
Steve Hargreaves - Moderator Posted June 14, 2012 Share Posted June 14, 2012 Thats my understanding too Thomas.....the 617 Rx must be going to its default setting on signal loss which unfortunately is driving the throttle servo to fully open.... Cooko, could you rejig the throttle linkage so it works in the opposite sense? My guess is that the Rx will always drive the servo in one direction on signal loss so make sure this is to close the throttle & then use the servo reverse feature/different linkage set up etc to make sure it works OK from the throttle stick.... Alternatively the FrSky Rxs have failsafe on all 7 channels set from the Rx itself.....might using one of these be a solution.....? Quote Link to comment Share on other sites More sharing options...
Cookson Posted June 14, 2012 Author Share Posted June 14, 2012 It would be possible to rejig the throttle servo. But to be honest if thats what I have to do I will be very, very unimpressed with futaba !!!! There is a button on the back of the module TM-8 that is labeled F/S Range ? Quote Link to comment Share on other sites More sharing options...
Steve Hargreaves - Moderator Posted June 14, 2012 Share Posted June 14, 2012 Maybe a call to Ripmax might shed some light..... Quote Link to comment Share on other sites More sharing options...
Cookson Posted June 14, 2012 Author Share Posted June 14, 2012 Just found this on a google search The white button on the transmitter module is the dual purpose "Fail Safe disarming"/"range check" button. To turn off the fail-safe, depress the "F/S Range" (disarming) button then turn on the transmitter. This button also serves a dual purpose for range checking before flight. Quote Link to comment Share on other sites More sharing options...
Cookson Posted June 14, 2012 Author Share Posted June 14, 2012 And now this The TM-8 transmitter module and R608FS receiver also provides you with a second safety system, the Battery F/S (failsafe). When the airborne voltage drops below 3.8V, the battery failsafe function moves the throttle to a pre-determined position. If this happens, you should land immediately! If you need to increase the throttle for your landing approach, you may temporarily reset the failsafe function by moving the throttle stick to the predetermined position, after which you'll have about 30 seconds of throttle control before the battery function reactivates. It says provides a second safety system, I'm struggling to find the first ? Quote Link to comment Share on other sites More sharing options...
cymaz Posted June 14, 2012 Share Posted June 14, 2012 I use the failsafe on all my FrSky 2.4 Rx's with my 9cap Futaba. All ways check them before a flying day and they have never let me down. Invest in some FrSky Rx's Quote Link to comment Share on other sites More sharing options...
Steve Hargreaves - Moderator Posted June 14, 2012 Share Posted June 14, 2012 Well it seems there IS a failsafe feature here Cooko....we just don't know how to set it yet.. There is usually only one failsafe position but two conditions that can cause it....low battery or loss of signal.....either condition will activate the failsafe.... Quote Link to comment Share on other sites More sharing options...
Cookson Posted June 14, 2012 Author Share Posted June 14, 2012 Ok, armed with all your input & info found on t'internet I've sorted it. The white button on the back of the TX module turns the failsafe on & off, it needs to be pressed prior to turning on the TX to switch off the F/S and again to switch on. Then with the TX & RX on & throttle closed press the RX bind button till red light comes on, release button green light on & throttle will now close when TX turned off. Seems to only work on throttle tho, a bit dissapointing but at least the throttle cuts. Thanks fellas. Quote Link to comment Share on other sites More sharing options...
Steve Hargreaves - Moderator Posted June 14, 2012 Share Posted June 14, 2012 Yes the 617 only has failsafe on channel 3....a bit disappointing as you say.... The FRSky ones have failsafe on all 7 channels & cost well under half the crice of a 617......still I'm sure SOMEONE at Futaba knows what they are doing...... Quote Link to comment Share on other sites More sharing options...
Cookson Posted June 14, 2012 Author Share Posted June 14, 2012 Might be looking at the FRSky ones next, unfortunate really as I just bought 3 617's. Quote Link to comment Share on other sites More sharing options...
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