you can buy them right now if you want from http://www.robbe.comwww.robbe.com but ive already contacted them and their system only does throttle cut, not our kind of failsaving needed on the receiver.
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you can buy them right now if you want from http://www.robbe.comwww.robbe.com but ive already contacted them and their system only does throttle cut, not our kind of failsaving needed on the receiver.
Ive sent an inquiry mail about the receiver failsafe settings of the extremelink at http://www.xtremepowersystems.net/http://www.xtremepowersystems.net/
quote:
I have seen the receivers on the website but I need a little more info.
I would like to know if the failsafe settings, are they programmable
on all channels, and not just €œhold in position€ with throttle cut?
Yes, each channel can have their own unique failsafe position. There is a failsafe map used to determine if the failsafe for each channel is USER DEFINED or HOLD LAST POSITION. Once the map is set, you set the actual failsafe position live, meaning that you put the receiver in learn mode and move the sticks/switches to where they need to be during a failsafe and a snapshot of those positions is taken and then used during a failsafe condition.
This makes the Xtremelink systems also usable for robotics.
It appears that rules for using 2.4 GHz have changed in Belgium and Holland over the last months.
Could someone please check the current status in the UK please.
We are checking what is going on over here.
Changed in what way?
Also to add, I am not aware of any changes to the regulations for use of the 2.4GHz spectrum.
(Message edited by kane on August 07, 2007)
The BIPT (The Belgian autority regardig RF use) has put an immediate stop on sales and use of 2,4GHz spread spectrum devices that transmit over 10mwatt for other purposes than Wireless lan application. As for Holland Ive not heard that it would apply here.
At the moment several import companies and retailers are looking to get this ban lifted again.
Ofcom have not announced anything to this effect.
In Holland we can use 2.4 GHz for RC upto 10 mW only. SRD rules would apply here. This is writen nowhere but I talked to the Dutch autority this morning.
Then we had better re-class the Specktrum as networking our robot to our fingers :) but seriously they must have a reason for it, This could affect robots going to your next event as most heaveyweights over here now use these at 100mW. Could we get away with pressing the range check button on the back permanently?
http://webapp.etsi.org/action/OP/OP20060922/en_300328v010701o.pdfhttp://webapp.etsi.org/action/OP/OP2...28v010701o.pdf
This is the document the BIPT (and apparently the dutch Agentschap Telecom is going to do the same) is making the basis of the ban from.
But that document allows the use of 100mW.
Spektrum is a wideband data transmission device.
The document covers wideband data transmission devices.
The type of modulation, etc. the spektrum uses is specifically allowed up to 100mW.
That document is no grounds to ban them.
I read that Frequency Hopping transmitters can go up to 100 mW but Sprektrum uses Direct Sequence which can only go up to 10 mW.
There are about a dozen Spektrum users over here. Since we are transmitting indoors, I think we should have no problems. I understand that networks are 100 mW as well, so we dont upset them.
Doesnt the Spektrum have a setting for France, limitting it to 10 mW?
You are quite right, the limit there is 10mW for DSSS. Please ignore my previous post.
Has anyone ever done a range check with 10mW on its spektrum (I have to admit i never have)?
We have tried it to test one of our pay-to-drive systems. we walked from one side of our factory to the other with no glitches so for robot use it will be fine. I have flown my plane off the DX6 too untill i can just about see it, so range is no problem.
thats with the dx6 on 10mW instead of its usual 100? Impressive.
I sent an email to Graupner (spektrum import and reseller for Europe) what they know of the Belgian situation. This is their reply.
quote:
Dear Mr van Miert,
we have recently received the information that the 2,4 GHz System is not allowed in Belgium.
It is not particularly to the Graupner System but to all transmitter in 2.4 GHz System.
We dont exactly know when it was decided. We are actually in contact with the belgian BIPT and we check how it is.
As soon as we receive information about it, we will inform you.
Yours sincerely
Florent Baudouin
Export
If and when they mail me, you will know about it too.
Leo, testing with the planes was on full power. We still havnt got to the point at which the 10mW test cuts out as the factory isnt long enough. you wont have any problems at all from one side of a hall to the other on 10mW.
quote:
In Germany, the €žBundesnetzagentur (organisation of the state) informed that 2,4 GHz RC equipments for aeromodelling will not be allowed. The decree will come to power in July 2008. Radio Control of model aircrafts using this frequency band competes with commercial and political interests mainly because of the strength of the transmitter signal which is necessary to overcome physical disadvantages of the very short waves.
Now this is interesting, because on the same page where i found this:
http://www.rcpilot-online.com/index.php?preaction=joint&id_joint=59799&PHPSESSID =92b928a920d1a48ac328b7c91a5bc815http://www.rcpilot-online.com/index....9799&PHPSESSID =92b928a920d1a48ac328b7c91a5bc815
Its a 2,4GHz range test of several different models and powers. On 10mW they had 1600meters of range.
Speed controller problems
I think I may have sourced the problems that I was having with Hive at the UK champs and it seems to come down to the spektrum I was using.
I tested the machine on 40meg with a futaba and it worked brilliantly.
I am wondering if anyone has similar problems with other speed controllers and spektrums? Also wondering if there is anything I can do with the spektrum itself to work with my speedos?
i had the same problems with mine when using the rs80d for the first time but, turned all the travels upto 125 percent and they work fine now
Cheers Kenny. Looks as though the problem is solved.
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?
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.
is there no pot on the switch that you can adjust the point of switching on? Robbe switches have those.
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
Cheers Trev,
That explains it!
Nearly forgot ..... @ Leo ...no trim pot that Ive seen.
(Message edited by woody on September 07, 2007)
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