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Re: safety issues
So basically it functions as the synthesizer receivers on 40MHz where it binds to the first or closest TX it can find?
Originally posted by peterw
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Re: safety issues
Could that problem not be alleviated by binding your Tx and Rx at home before travelling to an event? That way there is less likely to be other 2.4GHz signals from transmitters flying about and you can be guaranteed a successful bind?Comment
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Re: safety issues
Yes but there are always situations where it might be a problem, for instance when your receiver gets wrecked and someone lends you his or hers spare one so you can continue in the event. It doesnt need to be an issue but it could be all the same. Just something to look out for.
I would like to see some more conclusive failsafe results, that is more interesting to me than a possible bind issue.Comment
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Re: safety issues
I cannot believe I didn't think of that situation arisingor instance when your receiver gets wrecked and someone lends you his or hers spare one so you can continue in the event
*facepalm*
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Re: safety issues
I have done some further testing on the binding. With only one transmitter I am not sure I can unbind the receiver but here is what I have observed. If the system is up and running with the two bound together and I press the bind button on the receiver it starts trying to bind to the transmitter but never does unless I turn the transmitter off and then on which is good as it suggests you only have to worry about other transmitters that are turned on as you are trying to bind yours. If with the system up and running and you press the bind button as before it fails to bind but if you cycle the receiver off and then on it also seems to bind. This may actually be that it has not lost the binding from before as I say without a second transmitter it is difficult to tell.Comment
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Re: safety issues
Just a note to say the Planet 5 system worked without a hitch at the Robots Live event at Reading at the weekend.Comment
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Re: safety issues
worked without probs in my feather toOriginally posted by peterw
, ed did seem a little worried about it though at tech check 
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Re: safety issues
So tech checks worked out fine with these Planet 5 systems?Comment
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Re: safety issues
I was only using it in an Ant so mine didn't go through the full size checks.Comment
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Re: safety issues
passed tech check fine , failsafes worked lovely an it brought the robot to a stop under all conditions. Ed didnt seem to like them though ! Apparentyl there hasent been any problems yet but they dont use encritptionas good as those with spektrums or futaba systems.
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Re: safety issues
That's not quite the case if you understand the technology a bit (which I have had explained to me but can't really claim to understand it fully).Originally posted by muchalucha
The 2.4ghz protocol works on the basis of 'packets of information' which are sent between bound receivers. If a channel gets busy then it can get back up the information delivery (IE: your wi-fi which could be 2.4ghz can do the same if a lot of people are on line).
The encryption is the same, it all works on the same protocol.
What Fatuba and Spektrum have done is use the protocol to develop a top end system which operates well using channel hopping etc to make sure the flow of information is quick and reliable.
On the Planet 5 this was originally marketed as 'FHSS' which is the Fatuba protocol. If you get a set now this will be covered up with a sticker. I'm not sure of the reasoning behind this but I assume it is because of trademarks etc. The fact that this was on there seems to indicate it uses some form of channel hopping, whether it is as good as the Fatuba remains to be seen but it's not difficult programming to achieve it.
These transmitters are still relatively untested. From what I've seen I'd be quite comfortable to use them in an antweight or a feather but I don't really think they've proved themselves enoughtfor me personally to use them in one of the heavies. I'd just rather make sure there aren't any issues with speed of response or signal congestion or things running away before getting Pete to chase it round the arena when it's out of control!
AndyComment
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Re: safety issues
Frequency-hopping spread spectrum (FHSS) is a standard method of transmitting radio signals by rapidly switching a carrier among many frequency channels. It is not something from Futaba. You are confusing it with FASST which is a Futaba trademark. FASST uses FHSS in its protocol, while Spektrum uses DSSS (direct-sequence spread spectrum) in its DSM and DSM2 protocol.Comment
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Re: safety issues
Told you I couldn't claim to understand it fully!Originally posted by leorcc
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Re: safety issues
i did wonder what the FHSS hiding under the sticker was about
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Re: safety issues
I just got a coupler of new receivers and the label has been updated the FHSS has been removed.
The actual receiver board is very low profile except for the connector and the large aluminium electrolytic capacitor.
With a smaller tantalum capacitor and the connector modified I have managed to get a receiver + antweight speed controller smaller than the original receiver.
Module 9x25.5x42 mm and 10.2gms including 120 mm leads where as the oringinal receiver is 11.5x20x50 and 6.6 gms
http://i109.photobucket.com/albums/n66/ ... MG0852.jpg
http://i109.photobucket.com/albums/n66/ ... MG0855.jpg
The servo connector has been changed in the final cased version as it takes up less room and the fourth pin enables the use of full battery voltage on weapon controllers or servo.Comment
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