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Tim Mackey18/08/2011 23:11:26
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OK, so been busy binding my models, and generally finding my way around this set, after 4 years+ with my trusty DX7 and DX6i. So far I like the feel and general functionality of it, but have some queries ( and minor niggles ) and though it might be best to start a thread to exchange info with other DX8 owners.
So to kick off, heres a couple of things.
The manual is up to usual standards EG: Poor.... I hate the way they have now mixed the aero with the heli settings rahther than on the DX7 where he manual was in relevant sections .
1) If you enter the system settings mode by holding "clear" and "back" buttons whilst powering up, you get a screen called "Raw Input Test". Moving the trims and switches produces a number to appear against their designated spot on the screen, with different numbers for different directions and so on....but just what is the screen for ??
2) In the "Monitor" screen, my throttle only shows 95% at full WOT, or -97% at throttle shut -unless I push the stick hard against the end stops, when it then momentarily reaches 100%.
I found a calibrate screen at the end of the settings menus, and moved eack stick ( and the rotary knob for aux3 ) to their extremes, then centred etc, and got 4 x "OK" indicators, but it hasnt changed the throttle throw ?
 
Ill have loads more Im sure as I get deeper into things, but lets keep each query relatively short, before moving on
 
Pete B - Moderator18/08/2011 23:48:47
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Answer to Q1 from Andy Kunz a few posts down this page, Timbo. You can't damage anything, it would seem!
 
Pete
Cyclicscooby19/08/2011 12:05:24
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I got Paul a DX6 for his boats, but really it's so I can buy BNF's..
My issue, regarding the DX8, which is what i'll get, is the D/R's..
Can you set up all the D/R's on one switch, like my FF7..?? I don't like having a separate switch for each ch, like the DX6..!
 
Luv
Chrisie.. xx
Pete B - Moderator19/08/2011 12:39:28
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Yes, you can assign all D/R's to the same switch of your choosing, Chrisie.
 
Pete
Tim Mackey19/08/2011 12:50:07
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Thanks Pete - looks like a big thread to read up on.... I may be a while.
Interesting that Andy commented about how long it took the guys to find this screen - I found it in minutes from opening the box - probably cos the sequence is the same as the DX7 system mode entry.
Pete B - Moderator19/08/2011 13:01:56
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Yep, it's growed like Topsy - but with nearly 700 pages it's a bit unwieldy now. There's a lot of useful information there but unfortunately about 650 pages-worth are Spekky-sniping, ego-promoting posts which rather detract from the value
 
However, if you have a question, AK will respond pretty quickly or point out where it has been dealt with.
 
I know Chris Bott has had a problem resolved, as I did, with a DSMX/DSM2 French setting issue.
 
Pete
Chris Bott - Moderator19/08/2011 21:04:34
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Hi Pete yes it's a useful thread if you don't end up slitting your wrists after a few pages!
Andy does explain about the calibration somewhere. It's remarkable that the chief software designer for the DX8 still hangs around in there.
If we could strip out the useful information it would be a great resource.
 
Chris Bott - Moderator19/08/2011 21:12:55
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Tim the calibration works at a system level so affects all models. It has to be done on a fresh (or reset) model memory. The knob also has to be turned from end to end and set back in the middle. Try all that and see if it's any better?
Chris Bott - Moderator19/08/2011 21:19:48
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One last thing I'm not convinced I have my head around.
 
The software includes so called reverse mixing. This gives more flexibility but can cause confusion.
 
Say you have a two aileron wing on a model.
If you mix something like rudder to aileron or elevator to aileron you can mix say elevator to left aileron and both ailerons will operate. Or you can mix elevator to right aileron and both will operate. However in one case the ailerons will both go the same way, in the other case they will go opposite ways..... I think! Very useful, quite confusing.
Tim Mackey19/08/2011 22:18:39
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Posted by Chris Bott on 19/08/2011 21:12:55:
Tim the calibration works at a system level so affects all models. It has to be done on a fresh (or reset) model memory. The knob also has to be turned from end to end and set back in the middle. Try all that and see if it's any better?
 
Yup, done that and its still the same.
More worrying, I used it for the first time today after binding half a dozen gliders to it last night. First flight of first model, and it needed some down trim due to high windspeed up the slope - clicked the elevator trim tab, and the opposite effect was applied - the model climbed even more!! " others stood at the side of me and watched as I applied trim ( both up and down ) and it was working in the opposite direction
Other models were also flown and the trims seemed to work correctly - this has me baffled
Tim Mackey19/08/2011 22:23:44
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Tonight's teaser ( after the trim direction mystery ) - in the free mixes, why is there a second setting for the rate applied to the slave channel. I am used to seeing just the facility to select master and slave, and then apply the rate of mix required between them ( and also offset ). However the DX8 seems to have second mix rate that can be applied?
 
Repeat mantra moan about the rubbish manual.
Chris Bott - Moderator19/08/2011 22:30:16
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One is one side of centre, the other is the other side if I remember correctly. ie. one for each direction.
Chris Bott - Moderator19/08/2011 22:35:24
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On calibration, I sem to remember something about using a very feather light touch when going near the stick limits, and to do each axis separately. Personally I'm not too bothered what the numbers are, as long as they stay consistent.
 
On the trim direction, I seem to remember that cropping up recently, I'll go back and have a look. Was it a different model type to all the others or something?
 
If it's an issue that Andy is working on he will be very interested in your results...
I had an issue with flaps operating elevator in an unwanted way, but only if i had a lot of elevator trim in. They cured that after I brought it up..
 
 
 
Tim Mackey19/08/2011 22:41:06
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Ah I see, so one could have the slave channel working in one direction at one side of the master stick travel, and the opposite direction for the other side of stick travel.
Bit like your post earlier....clever, but as yet I cant see a use for that
Postscript: just thought of one perhaps......throttle to flapperons ( glider )
Throttle master, flaps slave. Throttle high ( above midway point ) and flapperons go up as spoliers, and throttle low ( below midway ) and flapperons go down as errr, flapperons.
All proportinal of course to throttle stick position.
I currently have some of my gliders set like this on the DX7, and its still pretty easy to set, as during the mix setting, you can move the master ( throttle ) stick to above or below midway, and apply either -ve flap, or +ve flap as required.
Chris Bott - Moderator19/08/2011 22:44:23
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Is this anything like it Tim?
 

Tim Mackey19/08/2011 22:44:30
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Posted by Chris Bott on 19/08/2011 22:35:24:
On calibration, I sem to remember something about using a very feather light touch when going near the stick limits, and to do each axis separately. Personally I'm not too bothered what the numbers are, as long as they stay consistent.
 
On the trim direction, I seem to remember that cropping up recently, I'll go back and have a look. Was it a different model type to all the others or something?
 
If it's an issue that Andy is working on he will be very interested in your results...
I had an issue with flaps operating elevator in an unwanted way, but only if i had a lot of elevator trim in. They cured that after I brought it up..
 
 
 
 
It was a simple two servo elevon glider model, with the same settings as the second model flown...also 2 servo elevon. In fact the basic settings were done by copying the first to the next free modelslot, and renaming. I then simply tweaked sub trims etc to suit. Its all very odd, and I may try a posting in that giant RCG thread and see what happens.
Be interested to see if you can find reference to the issue elsewhere.
Tim Mackey19/08/2011 22:49:35
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Wow yes - thats it almost exactly Chris!
Except mine was on elevator only - aileron was correct, and it only happened on the one model.
If I hadnt been on the slope, in big empty sky and at good height, it could have been catastrophic. Have to say this is pretty worrying for a brand new "improved" radio.
Tim Mackey19/08/2011 22:51:35
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Im off to post in that thread right now !
Tomorrow, I shall get the set and model out on the bench and do a similar video / test to that one. Tired now from a busy day up the slope, so off to bed real soon.
Chris Bott - Moderator19/08/2011 22:54:00
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I'm getting close to the discussion on your problem. I found a post, page 653 post 9789 that says "Just be sure to check your elevator trim for proper movement, and most importantly, proper direction. If you have an issue, report it to Andy."
 
Now looking to see what has been said before that. It seems to be an issue new in 2.03 and would probably be cured by going back to 2.01

Edited By Chris Bott on 19/08/2011 22:54:22

Chris Bott - Moderator19/08/2011 22:59:41
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Also see post 9881, refers directly to your issue I believe.

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