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Author Topic: GRANIT - 1/50th scale AHTS  (Read 11357 times)

bfgstew

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Re: GRANIT - 1/50th scale AHTS
« Reply #75 on: August 19, 2017, 02:13:23 PM »

Ok, see if we can make some headway. There are 2 sets of output modes on the FlySky......PWM and PMM and another set for i-bus and s-bus. Can i presume that the P94 needs PWM?
Because i am beginning to tear whats left of my hair out. My only other alternative is to get another Tx/Rx set, but which one.....minimum 7ch and at the 200 mark.


I really need some help guys, thanks in advance..... <:( <:( <:(
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hama

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Re: GRANIT - 1/50th scale AHTS
« Reply #76 on: August 19, 2017, 02:53:56 PM »

Hello!
I'm not the one to sort this out, but to offer some comfort. If nothing else work, buy some ordinary esc and use the mixing on your tx. Then  you can also have the option of turning on/off and tune your mixing as you sail. The Action stuff would bring you some money if you sell them, many people use them. As I said, only if nothing else works.
Good luck!
Hama
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Shipmate60

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Re: GRANIT - 1/50th scale AHTS
« Reply #77 on: August 19, 2017, 06:52:36 PM »

I do know that the action mixer requires a very precise neutral set point.
I did some testing for DM with a Spektrum Dx5 as it wouldn't play at all.
Try just the mixer on a known set eg Futaba.
If the mixer operates correctly it would seem to be incompatible with the radio set.
You could always drive as tank steering which would remove the mixer but not incur any more cost with ecs's.


Bob

 
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bfgstew

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Re: GRANIT - 1/50th scale AHTS
« Reply #78 on: August 19, 2017, 07:05:13 PM »

Hi Bob, thanks for the reply.
Tried with an old 2ch Futaba crystal set and works fine in 100% mix mode.
Tried FlySky in tank mode and is better, not correct though, soon as you add throttle motor bangs in, also if just using one stick opposite motor spins up for a second.
Think the problem is the FlySky unit, the throttle channel zero position is full down, in the middle it is 50%, hence why motors bang straight in. Tried all sorts to get it into a neutral position but no joy, nothing on you tube either.....this is one purely for the fly boys methinks........oh well better spend some more money.......the Planet T7 looks good value......any reason not to get one?


Regards


Stewart
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Bob K

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Re: GRANIT - 1/50th scale AHTS
« Reply #79 on: August 19, 2017, 08:51:48 PM »

the Planet T7 looks good value......any reason not to get one?
Regards
Stewart

I have never had problems with Action mixers on either Planet or Futaba F14.
Planets could be hard to get now as they no longer make them
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Mark T

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Re: GRANIT - 1/50th scale AHTS
« Reply #80 on: August 19, 2017, 09:45:10 PM »

Hi Bob, thanks for the reply.
Tried with an old 2ch Futaba crystal set and works fine in 100% mix mode.
Tried FlySky in tank mode and is better, not correct though, soon as you add throttle motor bangs in, also if just using one stick opposite motor spins up for a second.
Think the problem is the FlySky unit, the throttle channel zero position is full down, in the middle it is 50%, hence why motors bang straight in. Tried all sorts to get it into a neutral position but no joy, nothing on you tube either.....this is one purely for the fly boys methinks........oh well better spend some more money.......the Planet T7 looks good value......any reason not to get one?


Regards



Stewart


Now that rings a bell with me!!!  My spektrum was exactly the same it was set up for aircraft with the throttle fully down.  To correct this I spent ages in the settings and eventually worked out how to set the throttle neutral in the middle position with 50% forward and 50% aft with up and down movements  Its a bit late now but tomorrow I'll have a look which settings I altered  and let you know - maybe it will help
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bfgstew

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Re: GRANIT - 1/50th scale AHTS
« Reply #81 on: August 19, 2017, 09:50:31 PM »

Appreciate that Mark.......... :-))
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Mark T

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Re: GRANIT - 1/50th scale AHTS
« Reply #82 on: August 19, 2017, 10:02:03 PM »

Ok its not that late and I've had a look  %%


On my transmitter the neutral point and the percentage throw each way of the stick is set in the menu of "Analogue switch set up"


Now it takes some playing around with as you are basically changing percentage movements.  I can't remember exactly how I did it but I think that I moved the stick to the centre and set that at zero.


I then moved the stick fully forward and set that to +100% and then set the reverse to -100%.  So when the stick was in the middle the display always says zero, it took a little while but I got there in the end.  I really hope that this helps?
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bfgstew

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Re: GRANIT - 1/50th scale AHTS
« Reply #83 on: Yesterday at 10:23:14 AM »

Thanks for that Mark, but still a no go.
Shame this doesn't have the facility in the menu for neutral point adjustment............goes to show manafacturers are leaving model boaters out of it......shame because the FlySky does look and feel good.


Onwards and upwards, waiting to hear from SHG models if they have a Planet T7 on stock, fingers crossed.


Stewart
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JimG

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Re: GRANIT - 1/50th scale AHTS
« Reply #84 on: Yesterday at 07:50:55 PM »

i wouldn't bother about where the transmitter thinks the zero point is as the receiver doesn't know anything about it.All the receiver is looking at is a pulse length between 1000 micro seconds and 2000 micro seconds, it takes a length of 1500 microseconds as the center point. It doesn't matter if the Tx calls that 0 or 50 to the Rx it is center. The Tx may code the pulse lengths  in different ways but  the receiver will decode this into a set of pulses and send the correct pulse to each servo or esc. What the esc does when it receives the pulse can vary, they may look for different pilse lengths as off depending on whether they are forward only or both forward and reverse. You may need to set the neutral point and full power on the esc to get correct control.
Jim
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bfgstew

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Re: GRANIT - 1/50th scale AHTS
« Reply #85 on: Yesterday at 09:07:01 PM »

Jim, I understand what you are saying, but the P94 has no way of adjusting that.
What is the P94 looking for? PWM, PMM, I-BUS, S-BUS.........Lord knows, hence the problem of newer Tx not being compatible.
I really want this set up to work, i have spent too much to give in now and go with 2 seperate ESC's and try and mix it via the Tx, that's why i went with the P94 in the first place. A recommended list of Tx sets should be put up to avoid further issues that cost time and money.


Stewart
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