Mechanical HT help needed
Posted 19 September 2009 - 03:49 AM
I'd like to figure out how to get 2 of the channels (1 gimball assembly) onto channels 5 and 6 in my Futaba 7C. Using my buddy cord. I believe similar to the manufactured HT. Or is a 6 channel donor radio needed?From there I'll be going mechanical for my Myvu glasses. Thanks for any and all suggestions.
Similar to http://rcexplorer.se...eda83de-75.html He's using Ch 4 and 5, I'm hoping to find 5 & 6. Feasible at all??
Posted 19 September 2009 - 04:10 AM
What your 7C will do when enabling trainer on channels 5 and 6 is take the corresponding channels from the trainer port. So, the channel numbers need to match.
Posted 20 September 2009 - 06:04 AM
Posted 28 September 2009 - 05:39 AM
The amount of throws with the stock 5 and 6 channel turning knobs was say 90 degrees or so. Now I went and removed the knob pots and hooked up to the gimbal pots and my movement is less than 30 degrees. The turning knob pot was 10ohm and I believe the gimbal pots are 5ohm.
Is my next step to change to 10ohm pots on the gimbals or am I missing something here. Thanks for any and all help.
Posted 28 September 2009 - 07:08 AM
Didn't actually think of that earlier, but indeed the transmitter might have circuitry (resistors) between the gimbal pots and the processor that doesn't exist on the CH5-6 inputs. You might want to check if you see something that could be replicated. Or, which is more likely, it's just software calibration, in which case you'd be out of luck...
Edited by Kilrah, 28 September 2009 - 07:09 AM.
Posted 28 September 2009 - 07:16 AM
I believe I saw where someone had adapted a gearing setup to the gimbals and pots, I believe I know why now. I'll check the mount of movement on the gimbal pots later today and compare. Thanks
Posted 28 September 2009 - 01:01 PM
Posted 28 September 2009 - 01:25 PM
A ten turn pot would make the problem ten times worse.
If I was to use a 10 turn pot would that make a difference??
Time to see what can be hacked in the Tx. What Hitec Tx are you using? What is the FCC ID?
Posted 28 September 2009 - 04:17 PM
FCC ID IFH FOC456
Also I have no servo movement on either 5/6 unless a pot is hooked to both channels. When I hooked up the gimbals I removed all the trim tab stuff. I'm direct wiring to the gimbal pots.
The good news is I got my 5way splitter in today and all is fine with the ground station. 7' monitor, Myvu glasses, Sandisk recorder and MP5 player. All being powered from a 2200ma 3cell w/lipo monitor and only the DVR had to have a voltage regulator (20amp brushed esc with a heat sink)
Posted 28 September 2009 - 05:08 PM
Posted 28 September 2009 - 06:01 PM
Posted 29 September 2009 - 07:27 AM
Posted 29 September 2009 - 08:12 AM
I also have found the mechanical gearing style:
More tinkering later today.
Posted 29 September 2009 - 08:22 AM
That wouldn't work. The module expects and outputs servo signal pulses, not an analog voltage like you're dealing with in the TX.
Thanks again. I'm thinking just wiring it in between the pots and my donor TX board.
One of those modified with custom software for 3x gain instead of 2x (or even 6x, while we're at it, to get 180° servo movement) and put between the receiver and servo would indeed compensate for the loss of throw. However, resolution might be noticeably low.
Posted 29 September 2009 - 08:44 AM
I pretty much stripped the donor Tx board down already, meaning removed the excess stuff that did not affect the ch 5 and 6. Reverse engineering the existing ch 1 thru 4 will be tough. The gear setup looks feasible. Thanks again
Posted 29 September 2009 - 04:39 PM
With a Mechanical tracker is it better to have the gimbal return to center and install the springs again or leave it with a little friction and no centering? Thanks
Posted 30 September 2009 - 01:01 AM
Posted 30 September 2009 - 02:42 AM
Posted 01 October 2009 - 11:49 AM