Steve W-O Posted February 7, 2011 Share Posted February 7, 2011 Posted by r6dan on 06/02/2011 17:36:35:Posted by Tim Mackey - Administrator on 06/02/2011 16:25:54: twin elevators wghere physically a servo cannot be fitted correctly for direction, same with a situation I have right now...My steerable nosewheel servo and rudder servo are coupled via a Y lead, no spare channels to do a mix, but wheel goes one way, rudder goes the other. Need to reverse just one of the servos IYSWIM Its easy peasy! I could have mixed it to, say the gear channel switch but If I caught the switch taking the TX out my bag and didn`t realize it bad things would happen! My TX won't start unless all the switches are forward (or where you like) and the throttle is 0. You can start it, but you have to push two buttons, so it won't start up by mistake. Used to think it was a nuisance, but now make sure it is enabled, it also means it has become habit to check all the switch positions before turning on. Quote Link to comment Share on other sites More sharing options...
Adrian Smith 1 Posted June 24, 2012 Share Posted June 24, 2012 Having been rather chastised for employing a servo reverser on my set up rather that do a solder job to solve the problem, I decided as it was lashing it down with rain I would try some experimentation. Now most of planes fly with Futaba standard servos and guess what? Having examined the 3001,3003,3010 and 3305 standard servos I found all of them to be totally made to work via solder connections on the printed circuit board and no wires involved! (apart from the lead to the RX). Therefore the rewire was not an option. However, having taken apart a old Hitec 645MG this was wired similarly to some of the forum photos. So out came my soldering iron and the job was done and sure enough the servo was reversed compared to a similar 645 MG. If all futaba standard servos are like this then that precludes us amateurs doing the job without specialist equipment which I don't have. Other than Hitec I have no idea what other standard servos are wired this way, only that Futaba's current range aren't. Therefore, my original problem in November couldn't have been solved by soldering so it was just as well I had a servo reverser! Quote Link to comment Share on other sites More sharing options...
Paul Marsh Posted June 24, 2012 Share Posted June 24, 2012 It's not really needed, now. Radios are much more sophisticated, allowing split elevator set-ups, for example. If one is reversed, just reverse that channel. If one's radio hasn't got that, then time to go down the model shop/show to part some cash. Quote Link to comment Share on other sites More sharing options...
Erfolg Posted June 24, 2012 Share Posted June 24, 2012 You can also buy servo reversers which plug in line. Vecchio, had a posting of how to reverse a servo. It is simple in principal. You reverse the two end connectors to the pot, leaving the wiper connection alone. You also reverse the motor connections. In principal not hard, yet in life fiddley, particularly with 9g or smaller servos, for the average hand fisted male modeller. I would buy an inline servo reverser, if the Tx wont do it. Quote Link to comment Share on other sites More sharing options...
Adrian Smith 1 Posted June 24, 2012 Share Posted June 24, 2012 Well I tried using a spare channel (5 in this case) on my Futaba 6EX TX to accommodate split elevators and despite setting the EPA at the same level on the master and slave channels the slave ended up at a slight different position to the master despite being set at the same level to start with. Not good when it causes you to roll out of a bunt. Hence my earlier route towards a servo reverser, but I didn't find this terribly stable in practice as there is an occasional flutter. On my larger planes I now use a pull - pull system with wires using one servo which is totally reliable. However, I still have one A/C using a servo reverser, but I am not 100pc confident with the set up as it has a piece in the chain that could fail. Quote Link to comment Share on other sites More sharing options...
Mowerman Posted June 24, 2012 Share Posted June 24, 2012 Just bear in mind that different makes of servo may work in opposite directions. Just fit a different make. Quote Link to comment Share on other sites More sharing options...
Paul Marsh Posted June 24, 2012 Share Posted June 24, 2012 Some of the newer programmable servos can let you reverse the servo electronically. Much better than pulling a good servo apart and damaging it. The Hitec servos allow that an much more. Why bother with the above? Hitec Servo Programmer Quote Link to comment Share on other sites More sharing options...
Adrian Smith 1 Posted June 24, 2012 Share Posted June 24, 2012 Yeah right if you have 60 quid to burn! Quote Link to comment Share on other sites More sharing options...
Vecchio Austriaco Posted June 24, 2012 Author Share Posted June 24, 2012 Well, some of us are still using analogue servos, where the programmer is of no use. Just came from the field with my Edge 540 EP - where a reversed servo is driving half of the elevator. Regards VA Quote Link to comment Share on other sites More sharing options...
Paul Marsh Posted June 24, 2012 Share Posted June 24, 2012 If you're needing to reverse servos, then it would be with more advanced models, like the T-28 Trojan ,and you wouldn't fly that with a cheapo radio set or servos (I hope not!). One elevator half was reversed, and reversed the channel on the TX. Better than spending £60 then botching the job (if you're not 100% with soldering) and the model going in, or hitting someone. Bit of a no-brainer, really. Quote Link to comment Share on other sites More sharing options...
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