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New Transmitter from Futaba

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Malcolm Holt08/11/2018 13:47:55
93 forum posts
2 photos

Because of the mixing capabilities of the transmitter, a servo can be operated by more than one control simultaneously. For example, the rudder is under the direct control of its own stick J4 but, if an aileron to rudder mix has been programmed, it will also respond to movements of the aileron stick (J1). These effects are cumulative so, if both sticks are moved simultaneously, the servo could be driven to a point at which it stalls or damages the linkages. To prevent this, the Limit Points set the maximum amount the servo can move regardless of the number of mixes affecting it.

In the above example, the limit points could be set as follows. First set the Limit Points (135) to their maximum (155). Now hold the rudder stick fully right and increase the right TRAVEL value. The rudder will move further outwards and the servo will eventually begin to buzz in complaint. Make a note of the TRAVEL value at which this happens. Set the right LIMIT value to a slightly lower number to give a margin of safety and reset the TRAVEL value to its original setting. Now do the same for left rudder.

Adrian Smith 108/11/2018 16:07:55
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2317 forum posts
1102 photos

Thanks very much, Malcolm much appreciated. What you have written explains it all with complete clarity. yes

Robert Armstrong 226/04/2019 20:19:24
234 forum posts
23 photos

Help

I have a 14SG on version 6.0 software. The Ripmax site shows version 8.0 now out. Can I update direct to v8.0 or do I have to go through v 7.0 first? Would like to avoid two steps if possible.

Thanks in advance if anyone knows.

SR 7127/04/2019 09:02:04
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335 forum posts
84 photos

I have the 14 sg bought it shortly after it came out

It has never been updated as im completely computer stupid

Am I missing anything of importance by not upgrading it

Thanks Tony

Braddock, VC27/04/2019 10:20:36
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1640 forum posts
82 photos

I have a problem with the engine cut and idle down facility.

I suspect it's my own fault but it only seems to happen when the throttle servo is reversed.

I've checked on my kindle copy of malcolm's book but it doesn't switch my light on (or cause my penny to drop) any pointers gratefully received.

Malcolm Holt27/04/2019 10:56:55
93 forum posts
2 photos
Posted by Robert Armstrong 2 on 26/04/2019 20:19:24:

Help

I have a 14SG on version 6.0 software. The Ripmax site shows version 8.0 now out. Can I update direct to v8.0 or do I have to go through v 7.0 first? Would like to avoid two steps if possible.

You can go straight to Version 8.0 but note the following.

Some owners of older non-Futaba compatible receivers (e.g FrSky) reported problems when they upgraded to Versions 7 and 8. I don't use these so never paid much attention to the discussion. If you have any older non-Futaba receivers I suggest you check on-line or seek advice from Ripmax before running the upgrade.

Malcolm Holt27/04/2019 11:10:52
93 forum posts
2 photos
Posted by SR 71 on 27/04/2019 09:02:04:

I have the 14 sg bought it shortly after it came out

It has never been updated as im completely computer stupid

Am I missing anything of importance by not upgrading it

Thanks Tony

Start by checking your current software version. You will find it under System Menu - Info. Then go to the Ripmax web-site. Select Futaba Radio software upgrades under Important Links on the left and then select T14SG from the list of available transmitters. You will then be able to download the manual for each upgrade. The first part of each of these explains how to do the upgrade but this is then followed by a list of the improvements made. (Don't be put off by the word manual. In most cases it is only two or three pages and you can ignore the first part).

There have been some very significant improvements made over time but only you can judge whether they are of any use to you. That said, if your transmitter has an SD card and you have access to a computer with a card reader, the upgrade process is quick and easy. There is little to lose by upgrading subject to the proviso in my post above.

Malcolm Holt27/04/2019 11:39:05
93 forum posts
2 photos
Posted by Braddock, VC on 27/04/2019 10:20:36:

I have a problem with the engine cut and idle down facility.

I suspect it's my own fault but it only seems to happen when the throttle servo is reversed.

I've checked on my kindle copy of malcolm's book but it doesn't switch my light on (or cause my penny to drop) any pointers gratefully received.

Reversing the throttle channel should not make any difference. The only thing I can think of is that you might have adjusted the Limit Points on the throttle channel at some time and they are blocking movement in one direction.

Go to the End Point menu. The Inner values (100 by default) determine the throttle servo travel so you have probably adjusted these to give the correct tick-over and full throttle positions. The outer values should be left at their default 135 to allow the servo to move beyond its normal travel and thus permit idle down and throttle cut. You might even have to increase them to permit sufficient movement. Have a look at the Throttle Cut section of my book which explains this.

In the Throttle Cut menu the default position value is 17%. Change this to a smaller value such as 5% to cut the engine.

In the Idle Down menu the default Offset is +0%. Change this to a higher value such as +50% to lower the idle speed.

If you are still having problems can you please explain in a bit more detail exactly what is happening.

Robert Armstrong 227/04/2019 14:44:10
234 forum posts
23 photos
Posted by Robert Armstrong 2 on 26/04/2019 20:19:24:

Help

I have a 14SG on version 6.0 software. The Ripmax site shows version 8.0 now out. Can I update direct to v8.0 or do I have to go through v 7.0 first? Would like to avoid two steps if possible.

Thanks in advance if anyone knows.

Thanks Malcolm. Don't use non-Futaba receivers. Used to on a previous (T8) system but had a couple of odd crashes where the model seemed to stop responding, though post crash tests seemed to show the radio system working normally. Decided the relatively small cost saving was not worth the cost of peace of mind. Even more true now FHSS rxs are available.

Braddock, VC27/04/2019 18:42:14
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1640 forum posts
82 photos

Thanks malcolm, I've had a twiddle and will check it out next time at the flying field.

Michael Black27/08/2019 20:11:47
65 forum posts
1 photos

Hi Malcolm hopefully you are still seeing this thread. On my 14sg some models In the throttle curve menu I can set a switch to switch on and of the curve I want, on other models the option is not there any idea why this is?

 

mick

Edited By Michael Black on 27/08/2019 20:12:49

Malcolm Holt27/08/2019 21:51:20
93 forum posts
2 photos

Yes, there is an anomaly in the software. In order to be able to use switchable throttle curves it is necessary to have VPP assigned somewhere in the Function Menu. You do not need to use VPP and you can assign it to any channel, even one for which there is no receiver socket.

Check your different models and I think you will find that the ones where the curve switches appear also have VPP assigned somewhere.

Michael Black28/08/2019 20:14:11
65 forum posts
1 photos

Cheers Malcolm nailed it again.

thanks Mick

Michael Black22/01/2020 13:10:17
65 forum posts
1 photos

Hi Malcolm hope you can help me again, I’ve been have a problem with the 2 models I fly in the winter.

they fly okay for a couple of mins then go to tick over, I’ve been caching thong like breathes changing servos etc.

Today it happened and I found the throttle servo not working investigated and found it was the failsafe if I disabled the failsafe the servo worked fine. Enabled the failsafe and it was stuck again.

so I guess it’s either the Receiver or the transmitter I have also hadl their problem with another model but never narrowed it down the the electronics

problem I have is I can’t repeat it at home, and even at the field it’s intermittent.

have you any ideas?

 

 

edited to add the rest of the control surfaces work fine no glitches able to land on tick over

mick

Edited By Michael Black on 22/01/2020 13:38:44

Frank Skilbeck22/01/2020 13:46:14
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4568 forum posts
101 photos

Mick, could this be the low receiver battery failsafe, see page 80 of the manual.

Michael Black22/01/2020 13:57:23
65 forum posts
1 photos

Thanks for the reply frank I’m fairly certain I put the throttle down and back up as the manual says it should reset for a while and it did not. I’m running a 2s lipo and Bec might try a Nimh and see what happens. Is there a way of setting the voltage or is it preset?

 

mick

Edited By Michael Black on 22/01/2020 13:58:08

Malcolm Holt22/01/2020 14:06:01
93 forum posts
2 photos

Frank got there before me. Investigate the failsafe settings thoroughly. Make sure that your receiver batteries are fully charged and in good condition.

If you still can't pinpoint the problem I suggest you contact Ripmax who will probably recommend having the transmitter serviced.

Michael Black22/01/2020 14:58:18
65 forum posts
1 photos

Cheers guys

is the voltage cutoff preset and if it is what voltage? If it isn’t where do you set it?

mick

Jesus Cardin22/01/2020 16:30:52
44 forum posts
17 photos

Michael, as you describe the problem it is for sure a Battery Fail Safe activation (no throttle control but normal on the other channels).

Default B.F/S voltage in Futaba receivers is 3,8V and in 14SG you ONLY may change that on FASSTest receivers.

For changing the B.F/S voltage in FASSTest receivers you have to go to "SYSTEM" menu and just to the right of the "LINK" option you will find the B.F/S value. If you change the default 3,8V value, you will have to link again the receiver to refresh this on the receiver memory.

Futaba suggests the following safety voltage values:
• 4 cells NiCd or NiMH (Normal: 4.8v) = 3.8 v
• 2 cells LiFe (Normal: 6.6 v) = 6.0 - 6.2 v
• 2 cells LiPo (Normal: 7.4 v) = 7.2 - 7.4 v

Anyway with a BEC there is no logic on programming a B.F/S as the BEC shoud safely power the receiver and servos even after cutting the motor if the power battery goes too low. If you are getting B.F/S from a BEC unit, sure it is short for the power and number of servos you are using in your model. Be careful!

Edited By Jesus Cardin on 22/01/2020 16:33:58

Michael Black22/01/2020 16:54:59
65 forum posts
1 photos

thanks Jesus

im am using a 617 reciever so the batt f/s doesn’t show up I think I’ll plug a Niamh strait into the reciever and try that eliminate all the switch Bec wiring etc see what happens.

mick

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