Mixer

[domnu_doctor]

Hi ! :)

I have a boat with 2 engines (A and B) and a simple prop RC: no soft, no settings, ... 2 x Speed 480.
And I need a mixer on the boat to make after Rx, the next functions:
1. 2 Inputs : A (1,5 ms +/- 0,5 ms) and B (1,5 ms +/- 0,5 ms)
2. 2 Outpus:
2.1. A+B
2.2. A-B as simple as possible ! :D No sfotware ! If it's possible ! :cool:
Who can help me ? Even a scheme or ... a real mixer ! As fast as possible ! ;) :p

Regards,

[Keith Watson]

Engines? In a sailboat forum? ;)

What you are looking for is commonly called an airplane v-tail mixer (or elevon mixer). Go to the Tower Hobbies website, do a search on "mixer" and you will see some examples.

[domnu_doctor]

The function what I need it's:
Having 2 inputs A and B, I nee:on the outputs:
1. A+B
2. A-b

Regards,

[Keith Watson]

Are you looking for a dual motor speed control? I know of these in the robotics world where there is one speed control which has 2 pwm inputs, may or may not mix them, then drives 2 motors. The ones used in robotics are expensive. I don't know what might be available in the boat world.

An alternative is to use your 2 motors, 2 speed controls (one for each motor), and a mixer (like I mentioned previously) between the rx and the 2 speed controls.

Regards.

[domnu_doctor]

Ok !
I solved the problem with 2 controllers, for each motor and a simple V-mixer.
For one controller must be dissconected red pin, for the "+" output. The inputs (power supply "+" and "-") are conected to the same pack.
There's a problem: because the controller's delay's have different values, with difference between them is about 0,3-0,4 sec. when I give a command there's a short momment when first motor is moving and the second it's off ... :confused:
It is possible to correct this by trimm. But ... not enough ... :(

Regards,

[MILLERTIME]

Post this in Racing - Electric, your in sailboats.