Mamba Firmware V2.02

[DavidH]

Originally Posted by nedmo

well that sucks. My truck is far too jammed already electrickery.

If I get one, where would it go?

Between shift servo and y harness?
Between AUX wire and y harness?
Between Y harness and RX?

The Expert Electronics EXRA320 reverser has an integrated y-harness. The reversed output would go to the servo.

Alternatively, you could try to find a shift servo that rotates the opposite direction from the one you have now.

I was fortunate to have the room inside my rig to mechanically flip the servo horn to the other side of the servo to resolve this issue. I'd hesitate to attempt that in a TH.

[nedmo]

Originally Posted by DavidH

The Expert Electronics EXRA320 reverser has an integrated y-harness. The reversed output would go to the servo.

Alternatively, you could try to find a shift servo that rotates the opposite direction from the one you have now.

I was fortunate to have the room inside my rig to mechanically flip the servo horn to the other side of the servo to resolve this issue. I'd hesitate to attempt that in a TH.

Nah no room to swap the servo since I am using a nitro style linkage on the gear shifter.

My work around is to plug aux into another channel of my flysky and use a 3 pos switch with forward on the switch to change gears and back on the switch is crawler/rock race modes. Probably better this way so that if I wanted to be doing some fast rock sections but need full drag brake, I can.

[DavidH]

Originally Posted by nedmo

Nah no room to swap the servo since I am using a nitro style linkage on the gear shifter.

My work around is to plug aux into another channel of my flysky and use a 3 pos switch with forward on the switch to change gears and back on the switch is crawler/rock race modes. Probably better this way so that if I wanted to be doing some fast rock sections but need full drag brake, I can.

Just need to be careful then when you let the throttle trigger go after a top speed run so that you don't have the drag brake on when you were expecting it to coast to a stop.

[nedmo]

Originally Posted by DavidH

Just need to be careful then when you let the throttle trigger go after a top speed run so that you don't have the drag brake on when you were expecting it to coast to a stop.

yep happened a few times yesterday. Brake is strong!
I think it killed my HS5645MG shift servo.

[JatoTheRipper]

I just upgraded to 2.20 from 1.8. I'm going to, finally, try the Rock Racer mode today.

As others have said, my Holmes Hobbies Puller Pro has gotten very loud! Hopefully Castle is able to fix this.

[JatoTheRipper]

I'm in love with the Rock Racer / Crawler mode!

[bilinvic]

I finally got a Mamba X... in RR/Crawler mode, is the drag brake always at 100% in crawler mode? When a drag brake percentage is assigned with the Castle link, i.e., 5%, is this value being applied the Rock Racer mode? I want to be able to have my drag brake at 25% on crawler mode and be at 5% on RR mode with braking. I'm quite confused as to what input exactly is triggering the aux wire input signal. I have my DX4S "E switch" set to Aux 1 2P. Any assistance is greatly appreciated.

[bilinvic]

Spent some time searching RCC this morning and found what I needed to know.....

From Robert@castle:

I know it works on a DX4C. There is 3 modes for each of the AUX ports on the transmitter. 2p, 3p, and Lin. 2p and 3p stand for 2 and 3 position. Lin stands for linear.

In 2p mode, pressing the button one way will set the output to 1.0ms and pressing the other way will set the output to 2.0ms.
In 3p mode, pressing the button up and down with move it between 3 values, 1.0ms, 1.5ms, and 2ms.
In lin mode, pressing the button up and down will move it between something like 100 values in between 1.0ms and 2.0ms.

The ESC reads the ms of the pulse on the port to determine the setting value to use. Anything below 1.1ms will be 0%, anything above 1.9ms will be 100%, and the value will linearly scale for any value between 1.1ms and 1.9ms. So 3p mode will give you 0%, 50%, and 100% drag brake.


From Thomas Porfert at Castle:

Not to complicate matters, but you're not locked into just 0% and 100%; there is setting you can adjust on the transmitter to change the drag brake percentage in each position.
You can adjust the Travel value on the Aux channel to change the Drag brake % in each position. By default the Travel values are at 100% for H and 100% for L; this will cause the drag brake to be at 0% or 100%.
Lowering the H value will reduce the drag brake percentage from 100% to a lower value; decreasing the L value will increase the drag brake from 0% to a higher value.

Thomas Porfert
Tech Support
Castle Creations

[E. Bryant]

I finally got my Yeti XL up and running this weekend with the V2.02 software installed in a Mamba Monster X. Yep, it's definitely loud at lower speeds, but the Rock Racer/Crawler mode is so cool that I'm now looking to put X-series ESCs in all my crawlers. Setup for the aux channel was super-easy on my Futaba 4PLS.

In any sort of rock racer that combines some decent speed with a fair amount of mass, it'd be helpful to have a way to limit the motor speed in Crawler mode to prevent going full speed and then dropping the throttle only to have max drag brake kick in For now, I'll just need to exercise some trigger discipline in Crawler mode.

[JatoTheRipper]

Originally Posted by E. Bryant

I finally got my Yeti XL up and running this weekend with the V2.02 software installed in a Mamba Monster X. Yep, it's definitely loud at lower speeds, but the Rock Racer/Crawler mode is so cool that I'm now looking to put X-series ESCs in all my crawlers. Setup for the aux channel was super-easy on my Futaba 4PLS.

In any sort of rock racer that combines some decent speed with a fair amount of mass, it'd be helpful to have a way to limit the motor speed in Crawler mode to prevent going full speed and then dropping the throttle only to have max drag brake kick in For now, I'll just need to exercise some trigger discipline in Crawler mode.

Turn the drag brake off with the Auxiliary Wire when going fast.

[DavidH]

Originally Posted by E. Bryant

...
In any sort of rock racer that combines some decent speed with a fair amount of mass, it'd be helpful to have a way to limit the motor speed in Crawler mode to prevent going full speed and then dropping the throttle only to have max drag brake kick in For now, I'll just need to exercise some trigger discipline in Crawler mode.

I have the AUX wire connected in parallel with the two-speed servo.

[E. Bryant]

Originally Posted by DavidH

I have the AUX wire connected in parallel with the two-speed servo.

I'd do the same if I had a two-speed trans, but my Bomber and Yeti XL are both set up with single-speed transmissions. Maybe this is simply a good excuse to upgrade

[JohnRobHolmes]

The added bulk is better put in a larger motor IMO, but transmissions with more than 2.5x ratio between gears are pretty fun.

[tuanies]

Originally Posted by DavidH

I have the AUX wire connected in parallel with the two-speed servo.

I like this idea. Can you please provide details on the config? Any idea if I could make it work on the shifting servo with the Traxxas TRX-4 with the stock TQi radio?

[E. Bryant]

Originally Posted by JohnRobHolmes

The added bulk is better put in a larger motor IMO, but transmissions with more than 2.5x ratio between gears are pretty fun.

One of these days, I need to build a proper Simulink model and compare the benefits and drawbacks of each approach.

[tuanies]

Woot, I can confirm splitting channel 3 on the TRX-4 with the stock TQi radio for the aux wire let's you have crawler mode in low gear and rock racer in high gear. Loving it.

[thewildblue77]

Originally Posted by tuanies

I like this idea. Can you please provide details on the config? Any idea if I could make it work on the shifting servo with the Traxxas TRX-4 with the stock TQi radio?

Hi, I would be interested in this as well. Ive just built a bomber as my first kit, I went with the mamba X. I only have 3 channels and the 3rd channel is used for the gear servo. It would be great to have drag brake in 1st and off in 2nd...plus i like the idea of not having to buy another transmitter....

[84yoda]

Just hook up servo plug and the aux wire using a Y harness then plug it into 3rd channel. If it works, sweet. If it doesnt then the signal is backwards and you'll need to swap the Y harness for a servo reverser.

[thewildblue77]

So using a Y splitter should be ok. I assume that I need to enable the drag brake using the castle link ? Im currently awaiting for my usb link to be delivered.

[magic_yeti]

using a y splitter is to give the aux the signal. but of cause you have to configure the functionality of the aux via castle link. love the rock race / crawler mode.

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