9XR PRO - better gimbals

Hardware Support for the 9XR Pro
Pihlerm
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Re: 9XR PRO - better gimbals

Post by Pihlerm » Wed Dec 06, 2017 11:18 am

Ok, I'll open it up and make some photos.

@jhsa: I just replaced the throttle/yaw gimbal, so I simply removed the vertical trim _(don't need it).
But I see that people have cut the pcb for trim button in this thread, so when I install the right (pitch/roll) gimbal, I will try it.

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jhsa
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Re: 9XR PRO - better gimbals

Post by jhsa » Wed Dec 06, 2017 11:31 am

Ok, so then just a note.If you fly IC (Internal Combustion) powered models, you will need to keep the trim..
Trims that are not used for trimming a model can also be used to control other channels, at least in ersky9x you can do it. I am sure that opentx also allows for this..
So, it is always a good idea to keep them even if they are not used as trims. :) ;)

João
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Pihlerm
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Re: 9XR PRO - better gimbals

Post by Pihlerm » Wed Dec 06, 2017 10:28 pm

Ok, here are some images.

I wanted minimal cutting of plastic inside the radio so that I can revert to standard gimbals..
Just a little needs to be cut from the central "bridge", all the rest is intact.
3d printed part can be done in a better color.. but fits nicely.

I have uploaded the 3d part STL and SCAD to Thingiverse https://www.thingiverse.com/thing:2693386

The M9 gimbal itself only needs 4 3mm holes drilled through the printed plastic holes, for mounting everything on the radio.

I will probably re-mount the trim once i get the other (right) gimbal, as people above have done (cutting the PCB by 2-3 mm and resoldering the contacts).

Wiring is straight forward ([GND SIGNAL VCC] on the right side , left to right). Vertical gimbal is left connector, horizontal is right connector.

Other than that, you need to reverse throttle direction in software.

I also found a reasonable solution to trim switches. Disassemble the central bridge to get the trim PCB out. Unsolder the connector completely (mark one of the signal (white) wires with red dot..) then cut the PCB like this: (make sure not to cut the outer trace!)
DSC04774.JPG
Then, rotate the PCB by 180 degrees, and by cutting a little plastic, you can position it like this:
(Note that on the left, all necessary plastic has been cut. On the right (where the PCB is), some cuts still need to be made)
DSC04775.JPG
Solder the wires, make sure to swap the two signal wires (because of board rotation).
It all just fits nicely when you reassemble the switch.
DSC04778.JPG
Some other views on the bridge with plastics cut:
DSC04769.JPG
DSC04772.JPG

This is the gimbal adapter, mounted on gimbal (replaces aluminum plate):
DSC04776.JPG
DSC04766.JPG
It just fits inside:
DSC04756.JPG

This is the final look (printed in black ABS:)
DSC04782.JPG
Last edited by Pihlerm on Thu Dec 07, 2017 9:55 am, edited 9 times in total.

LaurenceCarroll
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Re: 9XR PRO - better gimbals

Post by LaurenceCarroll » Thu Dec 07, 2017 12:58 am

Hi, just joined the Forums here having got my 9XR Pro awhile ago now... I have installed the HobbyKing 3 axis stick and got it up and running a week ago or so....Mode 2 and replaced the right stick.... left stick is now just Throttle. Which I think I do need to adjust the range to show full range...

It was listed last year when I bought it as

Quanum Single Stick 3 Axis Gimbal Upgrade For Turnigy 9XR/9XRPro Tx's but I cant find it now in HK.....????

FYI....Laurie

Pihlerm
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Re: 9XR PRO - better gimbals

Post by Pihlerm » Thu Dec 07, 2017 6:25 am

Ok, I think i found a decent solution for trim switches.
Cut the PCB a little and rotate it (and cut a bit of plastic) .. solder the wires and voila.
See my previous post (i've updated it a bit).

I hope it helps somebody. In short: you need a 3d print of two adapters, disassemble, cut a tiny bit of plastic inside 9xr (nothing serious - just hobby knife), desolder / resolder wires from pcb of trim switch, cut the pcb a little, and reconfigure the M9 wires a bit.

I think - in all its worth it in the end. Works beautifully and i really like the smoothness of the gimbals.
And you don't destroy the 9xr in the process - you can always put back the original gimbals.

BR, Matjaž


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jhsa
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Re: 9XR PRO - better gimbals

Post by jhsa » Thu Dec 07, 2017 9:17 am

Nice. One problem the other taranis gimbals had on the 9XR-PRO was that when moved to the corners, they would hit the corner not allowing for full movement.
Could you please check the M9 doesn't do the same?
I don't consider it a big problem, but it might be for others.

Thanks

João

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Pihlerm
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Re: 9XR PRO - better gimbals

Post by Pihlerm » Thu Dec 07, 2017 9:21 am

@jhsa: yes, they just touch the corners a bit.
But they still have a larger throw than original 9xr gimbals.

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jhsa
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Re: 9XR PRO - better gimbals

Post by jhsa » Thu Dec 07, 2017 9:30 am

I remember someone wrote that those gimbals had less throw. But it seems there are more than one version of the M9 gimbals? I think there is one version with less throw than the other?

João

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Pihlerm
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Re: 9XR PRO - better gimbals

Post by Pihlerm » Thu Dec 07, 2017 9:57 am

Yes, the M9-R has less throw (intentionally) with better sensitivity, so you still get full resolution.
But for my fingers, more throw seems better ;)

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bob195558
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Re: 9XR PRO - better gimbals

Post by bob195558 » Thu Dec 07, 2017 11:02 am

More throw is better resolution and less throw is less resolution.
All they did with the M9-R was to put a stopper on the throttle movement.
ErSky9x on Taranis, Sky9x, 9Xtreme, Er9x on 9x with Smartieparts Programmer with TelemetrEZ Board
(http://openrcforums.com/forum/viewtopic.php?f=95&t=7182).
CR10 3D Printer: (http://openrcforums.com/forum/viewtopic.php?f=85&t=10702)

FPVChris
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Re: 9XR PRO - better gimbals

Post by FPVChris » Tue Jan 16, 2018 12:35 am

I just completed this MOD to my turnigy 9XR pro so I thought I would share my results:

First - the radio was brand new bought through hobbyking cyber Monday sale. From the very beginning the radio gimbals did not feel as good as my barebones FlySky i6x radio which was my first radio - This one has really smooth feeling potentiometer gimbals.

Compared to the flysky - The turnigy 9xr pro gimbals felt sticky on the upper half of the throttle range - friction was good until midpoint and then got stiffer in the top half of the throw range - this was really annoying when flying quads as I have my mid-throttle setup for cruise speed and i am constantly adjusting around the mid point and an asymmetrical feel makes it much harder. The centering was very strong on both sticks and not easily adjustable to get the feel that I wanted -> positive return to center but not "notchy" as I cross to the other way - a very common stick movement when flying quads. Also the Roll/Pitch gimbal never quite stayed in the middle - i would get a 0 value on roll when centering from left and a -0.5 when centering back from the right. There was clear flex in the potentiometer boards even with hot glue (factory applied)

Other than the issues with gimbal feel I really liked the radio - being able to run either openTX or Ersky9x - I tried both and settled on Ersky9x. I also really liked the full support for Frsky telemetry using the external XJT module I put in the radio.

So my best solution was put the M9 gimbals in my radio. I used the 3-d printed adapters on this thread and found them to work almost flawlessly. I believe the M9 gimbals may have been updated since their introduction. I see several pictures with different wire colors... Mine all came Red/Brown/Orange on each gimal Axis. I was able to work it out by looking at all the pictures and using a multimeter. I also had to do a lot more cutting to my central bridge to clear the gimbals (but I only cut small notches to clear the mounting screws in the gimbal structure and not the large sections like some people have shown.

The results: Both gimbals mounted and working perfectly - trim pieces are not yet adapted and re-installed but I don't really need them for quad flying so I'll clean up over the next few weeks.

Impressions so far:
- These are the smoothest gimbals I have used so far. They feel extremely precise around center and rock solid centering putting out exactly 1500 with no wandering on my flight controller. I am running these with 0 deadband instead of deadband = 2 like the stock brand new gimbals required to reliably center.
- The brake pressure on throttle is silky smooth and the same throughout the entire stick travel
- The gimbal sticks do hit the faceplate if you try max roll/ pitch or max throttle/yaw - this is not an issue for me as I don't fly a style where I would be at both extremes
- The sticks are much shorter in the default setting to the 9XR pro sticks. They also have much more travel - if I had to guess another 5 degrees in each direction
- When left in the lowest position my fingers constantly rub against the face plate - but the throw distance is quite good for my flying style - I fly pinch
- When extended to a more reasonable height it's much more comfortable to pinch, however the travel distance across vertical range is a little too long to comfortably pinch and your index finger hits either the P3 potentiometer or the ID3 switch
- neither stick height would likely cause problems for a person using thumbs - but for pinch flyers I would be careful and try someone's radio which has the gimbals installed before doing this mod

Overall:
- I am really happy with the upgrade so far. I tried playing around with the stick in the lowest setting and I think I can adapt my pinch style to work.
- These are the nicest gimbals I have had a chance to try so I want to make them work - but the best part about using the 3D printed adapters is that everything can be put back to stock.

I wish FrSky would just make a set of modified M9 gimbals to fit the 9XR radio. Even if they decided to charge us a premium at $25 each a drop-in solution would be worth it, especially if they shortened the throw angles and increased stick heights a little .... That would be amazing!

FPVChris

(edited to clean up some errors)

Zincyellowmach1
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Re: 9XR PRO - better gimbals

Post by Zincyellowmach1 » Wed Jan 24, 2018 4:43 am

A little work over on the stock ones can make a world of difference, if anybody is interested I can write out details. I got them feeling good and very little to no drift from 0.

webmaven
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Re: 9XR PRO - better gimbals

Post by webmaven » Wed Mar 07, 2018 8:48 am

I have installed the M9 gimbals but can't seem to reverse throttle direction. I don't see it in the hardware menu or anywhere else.

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jhsa
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Re: 9XR PRO - better gimbals

Post by jhsa » Wed Mar 07, 2018 9:43 am

What firmware are you using on your radio?

João

Sent from my BLN-L21 using Tapatalk

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ChrisTerroni
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Re: 9XR PRO - better gimbals

Post by ChrisTerroni » Mon Jul 09, 2018 8:50 am

Just wanted to say thank you for putting the time in and posting this for other. I had looked at this a long while ago and decided not go ahead. Your solution changed my mind I have modified the trims and printed the adapters. Now I'm just waiting for the M9 gimbal's to arrive.


Pihlerm wrote:
Wed Dec 06, 2017 10:28 pm
Ok, here are some images.

I wanted minimal cutting of plastic inside the radio so that I can revert to standard gimbals..
Just a little needs to be cut from the central "bridge", all the rest is intact.
3d printed part can be done in a better color.. but fits nicely.

I have uploaded the 3d part STL and SCAD to Thingiverse https://www.thingiverse.com/thing:2693386

The M9 gimbal itself only needs 4 3mm holes drilled through the printed plastic holes, for mounting everything on the radio.

I will probably re-mount the trim once i get the other (right) gimbal, as people above have done (cutting the PCB by 2-3 mm and resoldering the contacts).

Wiring is straight forward ([GND SIGNAL VCC] on the right side , left to right). Vertical gimbal is left connector, horizontal is right connector.

Other than that, you need to reverse throttle direction in software.

I also found a reasonable solution to trim switches. Disassemble the central bridge to get the trim PCB out. Unsolder the connector completely (mark one of the signal (white) wires with red dot..) then cut the PCB like this: (make sure not to cut the outer trace!)

DSC04774.JPG

Then, rotate the PCB by 180 degrees, and by cutting a little plastic, you can position it like this:
(Note that on the left, all necessary plastic has been cut. On the right (where the PCB is), some cuts still need to be made)

DSC04775.JPG

Solder the wires, make sure to swap the two signal wires (because of board rotation).
It all just fits nicely when you reassemble the switch.
DSC04778.JPG

Some other views on the bridge with plastics cut:
DSC04769.JPG
DSC04772.JPG


This is the gimbal adapter, mounted on gimbal (replaces aluminum plate):

DSC04776.JPG
DSC04766.JPG

It just fits inside:

DSC04756.JPG


This is the final look (printed in black ABS:)
DSC04782.JPG

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