New Mamba software (beta) posted today - RC-Monster Forums

nuz69 · 09:24 AM

hello guys, here are my first impressions :

- the Kv test of the motor didnt work for me, it says 3840Kv and I run a 1520/1Y "1600Kv" and i did the test twice, maybe we have to run it with specific voltage ???

- the torque limiter seems to total cancel the effect of the punch control, and like one of you said before, generate some strange crawling/cogging à start

- the power limiter works perfectly ! And it's a good thing for people who want different power/speed for their different applications without changing pinion or voltage

My setup : 70% punch control, 4 timing, no drag brake...

==> I noticed that the fan is always on since the new firmware, and I wonder if it has something to do with the power limiter. Indeed, correct me if I am wrong, limiting the power will heat a little more the FET of the ESC no ?

NuZ

Pdelcast · 10:32 AM

Quote:

Originally Posted by nuz69

hello guys, here are my first impressions :

- the Kv test of the motor didnt work for me, it says 3840Kv and I run a 1520/1Y "1600Kv" and i did the test twice, maybe we have to run it with specific voltage ???

- the torque limiter seems to total cancel the effect of the punch control, and like one of you said before, generate some strange crawling/cogging à start

- the power limiter works perfectly ! And it's a good thing for people who want different power/speed for their different applications without changing pinion or voltage

My setup : 70% punch control, 4 timing, no drag brake...

==> I noticed that the fan is always on since the new firmware, and I wonder if it has something to do with the power limiter. Indeed, correct me if I am wrong, limiting the power will heat a little more the FET of the ESC no ?

NuZ

NuZ --

The Kv test reports Kv as electrical Kv. So it will show "true" Kv on a two pole motor. Your 1600Kv motor is a 4pole, so it will show exactly double the "real" Kv. So, with timing (as programmed) the Kv of your motor is about 1900.

The torque control software should be set to a pretty high value in a setup where there is little wheel spin (low torque control). If you have a lot of wheel spin, set it lower (high torque control.)

For torque control, low values mean low torque, high values mean high torque. For a high voltage system, you will want to run pretty high values.

Torque control works completely differently than punch control. Punch control limits throttle change rate -- so if you go from "off" to "full" throttle, punch control will slowly raise the throttle to full over, say, half a second.

Torque control works by limiting the amount of torque the motor is allowed to make. It's a true closed-loop torque control.

Thomas Porfert · 10:35 AM

@Nuz 69: You're running a 4-pole motor, so you will need to divide the result by 2.

If I understand the setting correctly, because it's limiting the torque of the motor, it will supersede the effects of punch control; which is more of a voltage/RPM limiter. (correct me if I'm wrong Pat)

I'll let the engineers know about the issues with the torque control start-up.

The fan should not be running the entire time, torque control should actually reduce motor and ESC temps. Not sure why, but that is what I was told be Richard (our software engineer). Hopefully Pat can shed some light on the how and why.

I'll check with Richard and find out why the fan is running continuously. Was it a Mamba Monster or Mamba Max Pro??

@Fg101C: Did the problem persist when you turned off torque control? Or did you have the issue with it turned off as well?

Thomas Porfert
Castle Tech Support

nuz69 · 10:54 AM

Thx for your feedbacks P. and T.

==> My ESC is a Mamba Monster.

==> The torque control is in fact a current limiter, as the torque depend of the current ?

==> the cogging/crawling problem occured only with the torque control activated, so it's not due to the new firmware.

==> When I said that activate the torque control cancels the effect of the punch control, it's really the case IMO. For example, like you said Patrick, when you hit full throttle quickly without punch control, the motor will reach instantly its max RPM. With punch control you will see a delay until the motor reach the max RPM. When I activated the torque control (I set the value to 3.0), I did some throttle test, and the motor went instantly to max RPM, when I deactivated the torque control it was'nt the case anymore. That's why i said that.

Give me the time to run some other tests without punch control and I will post more feedbacks.

Pdelcast · 07.20.2010, 10:57 AM

Quote:

Originally Posted by nuz69

Thx for your feedbacks P. and T.

==> My ESC is a Mamba Monster.

==> When I said that activate the torque control cancels the effect of the punch control, it's really the case IMO. For example, like you said Patrick, when you hit full throttle quickly without punch control, the motor will reach instantly its max RPM. With punch control you will see a delay until the motor reach the max RPM. When I activated the torque control (I set the value to 3.0), I did some throttle test, and the motor went instantly to max RPM, when I deactivated the torque control it was'nt the case anymore. That's why i said that.

Give me the time to run some other tests I will do more feedbacks

Cool, thanx!

The torque control will give instant response to throttle changes (unlike punch control...)

So if you hold the model, you will see the wheel RPM change almost instantly. There is very little torque required to change the wheel RPM.

But on a track, the torque control will make the car/truck act as though it has a lower torque motor -- wheelspin will be more controlled.

Traction will be greatly increased, with no impact to throttle response.

We've got a little more work to do to finish the full traction control implementation, but this is a good step forward towards full traction control.

Thanx!

Patrick

nuz69 · 07.20.2010, 11:02 AM

Escuse my french language, but "wheelspin" design the fact that the wheels spin with no grip ? Like while a drift ?

Pdelcast · 07.20.2010, 11:05 AM

Quote:

Originally Posted by nuz69

Escuse my french language, but "wheelspin" design the fact that the wheels spin with no grip ? Like while a drift ?

yes -- that's what I mean by wheelspin. For example, when pulling full throttle from stop, the wheels will spin much faster and harder without torque control. Acceleration will be more controlled and faster (with less wheel spin) with torque control adjusted correctly.