RC Tank Warfare community hobby forum

I might be totally wrong here (assuming this is a bb tank), is the gun switch on?

If yours is like a HL there should be a switch under the loaders hatch, it might have got a bit damp and not be contacting correctly?

hth

Rob

Rob, yep the gun is switched on it just won't fire.

Alpha I'm gonna swap the turrets between my Tiger and King Tiger and see if it fires then. If the gun fires when hooked to the Tigers RX and the Tigers gun doesn't fire when hooked up to the KT then I know the RX is bad. One way or another I'm figuring this out today.

jackalope wrote:
Alpha I'm gonna swap the turrets between my Tiger and King Tiger and see if it fires then. If the gun fires when hooked to the Tigers RX and the Tigers gun doesn't fire when hooked up to the KT then I know the RX is bad. One way or another I'm figuring this out today.

Good thinking Jack...hope it works out

ALPHA

If you have a multimeter, switch it to 20v, DC, and test where you are getting current. Start at the multi pin socket and work your way through the wiring. You will need to establish which are the + and - for the gun activation.

You should get a around 5v at each +/- . If there is power at the plug, but not at the motor, you know that the problem is somewhere in between (apart from a flat battery?). Shared circuits are a pain as you have to trace the power supply through various components, but at some point you will find the fault.

If you had a pic of the internals so that we can see what you have in the tank it would great.

If an RX fails its usually the fets on the motor drives, rather than the circuits to the turret.

Assuming that it was all working before, there is an outside chance that a wire or a solder joint has come loose, so a quick check that everything is secure might identify the problem, the other is to check the trims on the tx are central.

Microswitches sometimes stick, they will cut power.

I recently did a custom wiring job on a scratch build, the elevation motor would only operate one way. I tried three elevation units, I stripped them down to check for jammed cogs, I tested the 8 pin socket. Everything was fine. I was absolutely stumped. I knew the board was ok as I had elevation on up and down in another tank.

The only thing that it could possibly be was the 8 pin plug and wiring that I had pulled from an old board. The continuity was ok, but for some inexplicable reason current would only go one way through the +/- on the plug?? I swapped it out for another 8 pin plug and wiring, and everything worked perfectly.

RobG

It was the STUPID damn switch to turn the gun on, it was broken! I bypassed the switch and hard wired it together and it works every time now like it should. Damn that thing made me madder then hell!

I took the turret from my Tiger and put it on the King Tiger and it worked so I knew it wasn't the transmitter or receiver but the King Tigers turret still wouldn't work. So I started checking the wires and where they were soldered and thats when I found the switch had come apart on the back side and could no longer make contact. I quick 2 snips and some solder and heat shrink and all better!

Thanks for the help guys.

Glad you found it, and yes, I understand your 'kick myself around the room' moment.

wibblywobbly wrote:Glad you found it, and yes, I understand your 'kick myself around the room' moment.

More like wanted to kick the damn tank around the room but then I'd just have more to fix!

jackalope wrote:It was the STUPID damn switch to turn the gun on, it was broken! I bypassed the switch and hard wired it together and it works every time now like it should. Damn that thing made me madder then hell!

I took the turret from my Tiger and put it on the King Tiger and it worked so I knew it wasn't the transmitter or receiver but the King Tigers turret still wouldn't work. So I started checking the wires and where they were soldered and thats when I found the switch had come apart on the back side and could no longer make contact. I quick 2 snips and some solder and heat shrink and all better!

Thanks for the help guys.

....................


ALPHA

Glad you got it sorted, must have been frustrating.