Stahl 922 help

[Kaf343]

Originally Posted by Lil Giants

No bother, we'll get you squared up & running smoothly.

Sounds like you need to adjust "center" for aux 2 so both tracks travel equal speed, same direction when moving Aux 3 for/rev.

Go to menu - servo adjustment - (travel will appear, click it) scroll to sub trim to fine tune center of Aux 2.

Also under servo adjustment, you may want to adjust turning speed of Aux 2, being that the 3pos switch is +100% > 0% > -100%. Go back to Travel to lower + - for both directions for slower control... but much less than +-100 and the tracks won't spin opposite each other when Aux 3 is engage, rather one track will just slow down. Your preference how you'd like it to work.

I was hoping to get my 2x25 Sabertooth in my JD850 to work just like your's is now, but it didn't... I had to incorporate the flight mode switch & jiggle with the subtrim & travel of both Aux 1 & 3... it's so complicated I can't remember how I did it. So be real careful to never short out that dual esc you have b/c they're extremely pricy to replace.

Well I will mess around with it tonight, but as of this morning still no go. I think part of my problem is not knowing which of the two plugs coming from the ESC should be Aux2 or Aux3, I have tried switching them but still cant get Aux3 to control direction and Aux2 to control steering. Ive tried centering Aux2. There are three adjustment pots on top of the ESC, they seem to fine tune the speed but do not help with the direction.

The best I've gotten so far is Aux3 to control speed forward and reverse, but Aux 2 has to be in the up position. When its in the midle position the ESC does nothing. When putting Aux2 in the lower position the tracks reverse direction. When putting Aux3 in the center position one track goes forward fast and the other goes in reverse faster.

So having said that I think i'm just spinning wheels or tracks (LOL) until I understand what the actual function of the ESC is, in specific there are two wires coming from the ESC that will be plugged into the Reciever, which one gets plugged into Aux2 and which one into Aux3 and is one for forward and reverse and the other for steering or is one for the left track and one for the right track. And lastly what are the three trim pots on the ESC used for?

[Lil Giants]

Originally Posted by Kaf343

The best I've gotten so far is Aux3 to control speed forward and reverse, but Aux 2 has to be in the up position. When its in the midle position the ESC does nothing. When putting Aux2 in the lower position the tracks reverse direction. When putting Aux3 in the center position one track goes forward fast and the other goes in reverse faster.

This sounding like how my Sabertooth behaved in mix mode... your earlier post I thought it was working differently.

So you have been messing with the 3 pots too?

The 2 rx leads from the esc are not marked, but yes, 1 is for for/rev & the other is steering. Can't turn off mix for individual control of each motor.

In order to get the 3 pots properly calibrated again & figure which rx lead does what... plug the two rx leads into throttle & rudder, which will be your left gimbal if the radio is set in Mode 2 configuration.

With two fully proportional chs you should then be able to make the esc perform properly with calibrating the 3 pots on the esc.

Once you know which rx lead is for direction (for/rev), plug that into Aux 3. Steering will be Aux 2.

Then try again to see if Aux 2 will behave properly for steering.