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How do I eliminate

Posted: Thu Jan 11, 2018 2:45 am
by Norton1
the track portion of the recoil on the KT? I bought a piece from our german friends and it came with no instructions. Just three wires out the back and a place to plug a 2 pin connector in. And 4 places to put other wires into. It's a lovely unit, and I saw a wiring diagram here but danged if I can find it now. I think it is called an ARM unit?

Thanks and be well,
Steve

Re: How do I eliminate

Posted: Thu Jan 11, 2018 10:59 am
by RobW
Pretty sure it goes between the RX board & the motors. I've got one somewhere and am equally stumped, not least because it looks like I need to solder something....

Re: How do I eliminate

Posted: Thu Jan 11, 2018 2:45 pm
by Norton1
Yep, there is soldering involved. The Modelbau folks sent a set of instructions in German. I have a niece who is German and will likely need to get her to translate for me.

Re: How do I eliminate

Posted: Thu Jan 11, 2018 4:24 pm
by Norton1
Instructions - hmm Nich spreken sie Deutsch
20180111_090851 (700x525).jpg
20180111_090930 (700x525).jpg

Re: How do I eliminate

Posted: Fri Jan 12, 2018 12:11 am
by 43rdRecceReg
Quick precis of the instructions you have there:
!. Check you have an RX14 or RX18 board. This unit only works with HL RX14 or 18 boards.
2. There are three solder points/pins to make. Ensure you look at the diagram carefully, and solder to the correct points.
3. Solder point/pin 1: Ground ( Black cable or Earth)...best thing is to solder it to the Main Switch.
Solder point/pin 2 : Signal (Green cable)...it is the third pin from the left on the little HL board (see picture). Be careful not to make a short circuit. !!!
Solder point/pin 3 : 7.2v (+)...(Red cable).. Should also be soldered to the Main Switch.
4. Cut the red cable from the left motor, and the same for terminals 1a and 1b screws and now the same with the red right hand terminals screws 2a and 2b.
Now you are ready.... "

Hope this helps. It's a bit rough but just about correct, i think. :thumbup:
Roy.

Re: How do I eliminate

Posted: Fri Jan 12, 2018 4:37 am
by Norton1
4. Cut the red cable from the left motor, and the same for terminals 1a and 1b screws and now the same with the red right hand terminals screws 2a and 2b.

I'm with you to this point. And Thank you BTW for your expert assistance!! I will look at the tank tomorrow and see which wires I cut. Just the red ones? And I have the RX-18 board.

Thanks again!!
Be well,
Steve

Re: How do I eliminate

Posted: Fri Jan 12, 2018 11:06 am
by 43rdRecceReg
Norton1 wrote:4. Cut the red cable from the left motor, and the same for terminals 1a and 1b screws and now the same with the red right hand terminals screws 2a and 2b.

I'm with you to this point. And Thank you BTW for your expert assistance!! I will look at the tank tomorrow and see which wires I cut. Just the red ones? And I have the RX-18 board.

Thanks again!!
Be well,
Steve
That's all I could glean from the pic you posted, Steve. I noted that it was page 3 of three, so I've no idea what was written on the other two. :think: I'm glad you're not defusing an unexploded bomb though! :)
I'm pretty sure that my translation is accurate enough; but it's possible that it wouldn't be all that clear even to a native speaker either, if it's a translation- in turn- from Taiwanese or mandarin :D
Roy.

Re: How do I eliminate

Posted: Sat Jan 13, 2018 12:02 am
by Norton1
The cutting of the left red cable then the right one doesn't make sense to me. Am I supposed to run the red from each one through the connector? I mean, cut the red wire from each motor and route them through this unit?
My wiring
My wiring
The picture isn't all that clear.
The instructions
The instructions
Be well and thanks!
I'm glad it isn't a bomb either!!

Steve

Re: How do I eliminate

Posted: Sat Jan 13, 2018 12:39 am
by 43rdRecceReg
I can only go with what was on p.3, Steve. Personally, I've not had any experience with track recoil reduction systems; not do I feel an urgent need to modify them. In a way, I quite like the dramatic moments the create- even if it is just 'ham' overacting.
I imagine cutting the red wires to the motors will prevent the recoil signal getting to them. Then again, the motors will need some source of power from the Battery (+) via the MFU L and R terminals, and so there should still be a direct connection from the MFU to the motors. Then again, it's the MFU providing the recoil signal to the motors. Therefore, the red to the motor has to pass though the recoil nullifying unit before it reaches the motor (+) terminals, I guess. Looking at your wiring, the motors are connected directly to the L and R connects on the MFU. Normally, that's how it goes.
Somehow the unit has to be wired in between the MFU and the motors,,rather like a switch, I guess.
Not having the setup to hand, nor my usual tools (multimeter. continuity tester..etc.) it's hard to proceed in a meaningful way. If the wires somehow pass through it's not made clear here in the text, and the diagrams ..being vague greyscale.. don't make it any easier to see what to do though this iPad I'm using. :think:

Re: How do I eliminate

Posted: Sat Jan 13, 2018 1:01 am
by Norton1
Even on the big screen the picture is pathetic. I sent Model-bau an email asking for a clearer picture and an explanation in
english. My hopes are not high. If they can't help me then I will post a bad experience with them and let it go from there.

I don't mind the recoil so much, but if my tank is shooting to the rear it looks a tad wierd. And I don't know how stout the plastic gears are in 2 of my models. The steel can likely handle it OK but it really jerks hard.

Thanks again for your help on this dang thing. I know someone on here has done this and even posted a workaround that one could build themselves. I was hoping they would come forward. Well at least it isn't a bomb.

Be well,
Steve