GT3B Hack Question and Answer Thread

[losikid]

https://youtu.be/efqxwYHM8dU

I made a video on how to set up 4WS (with Crab) and DIG (with reset button). Hope this helps someone:

Quick tip. Go into the global menu, scroll to H, press enter change EN to ER. Then exit the menu

This reverse the encoder so scrolling right actually scrolls right.

 

[dweano]

Quick tip. Go into the global menu, scroll to H, press enter change EN to ER. Then exit the menu

This reverse the encoder so scrolling right actually scrolls right.

Thats awesome! I always wondered what that setting was. Makes sense now that I think about it

 

[toka100]

A few quick questions. Sorry I just haven't read all 230+ pages yet.
Will hacking the gt3-b allow me to get rid of the 70-30 throttle?
Losikid. You are still selling kits. I see you are still posting in here in the last week or so. I know this has been around for a long time Really didn't think this was still being done.

 

[MiniMorris]

Is there a way do the dual ESC mixing (tank steering) and also map a channel for a regular 'steering' servo? Don't need the key strokes, just an overview. Thx!

 

[losikid]

A few quick questions. Sorry I just haven't read all 230+ pages yet.
Will hacking the gt3-b allow me to get rid of the 70-30 throttle?
Losikid. You are still selling kits. I see you are still posting in here in the last week or so. I know this has been around for a long time Really didn't think this was still being done.

No, it will still be a 70/30 throttle. That is a mechanical system.

Is there a way do the dual ESC mixing (tank steering) and also map a channel for a regular 'steering' servo? Don't need the key strokes, just an overview. Thx!

You can do tank steering by assigning the DIG mix to channel 1. The steering wheel becomes the mix adjuster and lets you turn left/right.

What are you doing with the steering servo?

 

[MiniMorris]

You can do tank steering by assigning the DIG mix to channel 1. The steering wheel becomes the mix adjuster and lets you turn left/right.

What are you doing with the steering servo?

I'm building an amphibious tank so it will have tank steering until I go into the water, then a remote switch on an extra channel would turn off the ESC's and the steering servo would be the jet drive rudder.

I don't know if this is possible but I could put two receivers in the tank and map a button to switch models so I could quickly transition.. :shock:

Ideas?

 

[losikid]

I'm building an amphibious tank so it will have tank steering until I go into the water, then a remote switch on an extra channel would turn off the ESC's and the steering servo would be the jet drive rudder.

I don't know if this is possible but I could put two receivers in the tank and map a button to switch models so I could quickly transition.. :shock:

Ideas?

There is currently no way todo what your want.

But, I took a quick glance at the code and I think I can make it so when you also activate 4 wheel steer, you can control an auxiliary servo with the steering wheel.

I might have some time next week to test this idea.

As a side note. Why do you need a rudder? Why wouldn't spinning the tracks on one side or the other turn the boat? It would be like rowing on one side of the boat, which will make you go in circles.

 

[dweano]

His post says it is a jet drive rudder. So a jet drive will move a boat/amphibious tank alot faster than spinning treads haha.

Couldn't you still just hook up the rudder to one channel of the tank tread and let it move back and forth (it will be out of the water anyways) with the tank steering. And then in the water the rudder will keep steering?

 

[losikid]

Couldn't you still just hook up the rudder to one channel of the tank tread and let it move back and forth (it will be out of the water anyways) with the tank steering. And then in the water the rudder will keep steering?

This would only allow you to turn in one direction.

 

[dweano]

This would only allow you to turn in one direction.

Don't the tank motors go forward and back in tank steer mode? So neutral would be straight rudder, forward would be left rudder, and reverse would be right rudder? Or no?

 

[losikid]

Don't the tank motors go forward and back in tank steer mode? So neutral would be straight rudder, forward would be left rudder, and reverse would be right rudder? Or no?

No, It's the same as DIG mix but using the steering wheel to control biasing. So you just slow down one track or the other.

 

[MiniMorris]

His post says it is a jet drive rudder. So a jet drive will move a boat/amphibious tank alot faster than spinning treads haha.

Couldn't you still just hook up the rudder to one channel of the tank tread and let it move back and forth (it will be out of the water anyways) with the tank steering. And then in the water the rudder will keep steering?

This would only allow you to turn in one direction.

Yes, the plan was to have a jet drive. This discussion made me realize something else. I was planning to have the jet drive esc tapped to channel 2 and operate with throttle trigger with a remote switch to deactivate the drive escs but it sounds like the dig bias would cause me to lose power when turning one direction correct?

1 6ch receiver would be preferred but if this is something you don't think I can get around, is there a way to set a hot key to switch model so I can have a boat mode and tank mode? Then I would be relying on a properly-set fail safe to keep the tank drives from going haywire.

 

[losikid]

Yes, the plan was to have a jet drive. This discussion made me realize something else. I was planning to have the jet drive esc tapped to channel 2 and operate with throttle trigger with a remote switch to deactivate the drive escs but it sounds like the dig bias would cause me to lose power when turning one direction correct?

1 6ch receiver would be preferred but if this is something you don't think I can get around, is there a way to set a hot key to switch model so I can have a boat mode and tank mode? Then I would be relying on a properly-set fail safe to keep the tank drives from going haywire.

You can't switch models with a button.

I know people do dual motors on boats for steering and they use the same tank mix. Can you put your jet drive assembly on the left and right hand sides to steer that way?

Alternatively, My wantAmix can create a mix that you need. You would plug the inputs into the throttle and steering channels. then it will give you two outputs for the tracks. Then you directly connect the throttle and steering channels to your boat drive and rudder.

 

[MiniMorris]

You can't switch models with a button.

I know people do dual motors on boats for steering and they use the same tank mix. Can you put your jet drive assembly on the left and right hand sides to steer that way?

Alternatively, My wantAmix can create a mix that you need. You would plug the inputs into the throttle and steering channels. then it will give you two outputs for the tracks. Then you directly connect the throttle and steering channels to your boat drive and rudder.

This is my understanding, correct?

Ill fix a servo to a 4PDT switch to control which esc's are on.

*Correction - I will probably fix two 4PDT Switches to a servo so I can have all 3 esc's on at once, or just tank, or just boat.*

How does wantAmix handle trim/endpoint adjustments?

 

[losikid]

This is my understanding, correct?

Ill fix a servo to a 4PDT switch to control which esc's are on.

*Correction - I will probably fix two 4PDT Switches to a servo so I can have all 3 esc's on at once, or just tank, or just boat.*

How does wantAmix handle trim/endpoint adjustments?

Yes, that drawing is what I think will work....


The wantamix has calibration pots to work with the trim and end-points...

 

[ribaja]

Another noob question I tried finding but no luck can the end or back button be set up as a 3 position switch

 

[losikid]

Another noob question I tried finding but no luck can the end or back button be set up as a 3 position switch

You can assign it to Multi-Position which will let you cycle through 3 positions

 

[ribaja]

You can assign it to Multi-Position which will let you cycle through 3 positions

losikid thank you could you tell me how to do this

 

[nedmo]

i have a twin hammers and a new mamba X and want to utilise the AUX wire rock crawler/racer function.

Currently, with a y harness and the 2 speed servo and AUX wire hooked up to Ch4 and programmed as SWI on 3rd channel button, I get

Low Speed - Rock racer mode
High Speed - Rock crawler mode

So completely backwards to be functional.

Is there a way to reverse the signal from the RX for the channels? I have tried reversing the channel from REV menu and also changing the SWI settings from NOR to REV

 

[NWHavok]

A read protection is on, a window will pop up reading the "Device is Protected." I don't have the STVP software in front of me, but that's a good place to start.

Still can't find where I can change the protection using the STVP.... I'm at a loss..