[FuzzyJack]

Hi all,

Wiring up the TCB to the Henglong Sherman and I've made a couple of adapters so I can connect the existing Henglong plugs to the TCB, including one to allow the two XH connectors from the BB unit motor and trigger switch to connect to the 3 pin RECOIL connector on the PCB. 

Basically it just puts the two black wires to pin 1 and then wires the red from the motor to pin 2 and the red from the trigger switch to pin 3.

When operating the cannon the motor seems to try at least to spin and makes a horrific noise doing it but the mechanism doesn't fire so it never hits the trigger switch.  After a while it stops.

I've tried with an old spare BB unit as well and it did the same thing.    Am I missing something?

Obviously the Airsoft rewiring instructions are for the Taigen unit but I assumed the henglong would be the same as it's just a motor and a microswitch.

Cheers,

Chris.

[LukeZ]

Hi Chris, have you tried swapping the motor wires? I haven't tested one of these units, but I wouldn't be surprised at all if Heng Long decided to use a red wire for negative...

[FuzzyJack]

That is entirely possible...  I traced the wires through after I realised that the gearbox on the BB unit is one directional.   Swapped the motor wires and yeah it works ok now.  Doh!

Also I am going from the BB unit through the 360 slip ring so it's possible it got swapped over there as well.   I just turned the XH connector on my adaptor round.

[LukeZ]

Thanks for reporting back, I'm glad that's all it was!