question about brakes on the mamba max pro - RC-Monster Forums

DwightSchrute · **question about brakes on the mamba max pro -** 04.15.2011, 07:19 AM

i've noticed that my mmp dosen't have any where near the brake capacity as other escs i've seen.

i've changed the brake settings to 100% and i still feel like it's no where near what it's supposed to be.

Do i need to re calibrate my esc everytime i change the brake setting on the castle link or field programmer? that's the only thing i can think of that i might not be doing.

any help is appreciated.

DwightSchrute · 04.15.2011, 08:14 AM

also, i'm using old firmware could this be an issue as well?

BrianG · 04.15.2011, 09:57 AM

Out of all the MMPros I have used on different software versions, I've never had brake issues. If I max them out, the vehicles all but flip over forwards or lock the tires when I jam on the brakes. If I ease into them and/or lower the brake force in the ESC, the brakes work fine.

Sounds to me the ESC is not seeing the full brake signal. Set ESC brakes to 100%, set radio throttle trim to 0 (centered), and any EPA setting to 100% in both F and R directions. Then, recalibrate the ESC and radio.

DwightSchrute · 04.15.2011, 03:39 PM

thanks Brian, i'll try that. much appreciated.

DwightSchrute · 04.15.2011, 03:54 PM

on my spektrum dx3, i have a travel setting that allows throttle and brake to 150%.

when i turn those up to 150%, i don't get 100% brakes, but i get full speed. when i set it to 100% on both, i get full brakes and not full speed.

So i'm wondering where the both meet? am i missing something?

suicideneil · 04.15.2011, 05:42 PM

Are you recalibrating after you change the epa each time?

Can you set 150% for throttle & 100% for brakes independently, or is there one setting/adjustment which affects both brakes and throttle at the same time?..

DwightSchrute · 07:37 PM

Quote:

Originally Posted by suicideneil

Are you recalibrating after you change the epa each time?

Can you set 150% for throttle & 100% for brakes independently, or is there one setting/adjustment which affects both brakes and throttle at the same time?..

yeah, i tried re-calibrating after every change. maybe the brakes not being as good on 150% as 100% is in my head. i am afterall going faster than the 100% setting on the throttle i just figured i'd see a bigger difference in brake because the top end difference is large.

i changed the brake curve to an almost vertical line and that helped alot.

so i think i'm going in the right direction now...thanks to Brian and Neil for the advise.

DwightSchrute · 04.15.2011, 09:04 PM

aiiiiight...i'm an f'ing moron.

i forgot to say i was running a sensored motor....a novak ballistic 5.5 on the mmp.

i took out the novak and put in a castle sensorless motor and it was back to full brakes. i know the throttle is much smoother in a sensored motor, but i had no idea the brakes were softer as well.

no biggie. thanks for the help guys.

BrianG · 04.15.2011, 09:17 PM

That shouldn't make a difference. The Tekin system in my Ten-T brakes really well, actually better as it acts more like ABS.

DwightSchrute · 04.15.2011, 10:30 PM

Quote:

Originally Posted by BrianG

That shouldn't make a difference. The Tekin system in my Ten-T brakes really well, actually better as it acts more like ABS.

when i say brakes, i mean their maximum stopping ability. i run 1/10 buggies on a very tight track with alot of technical sections and hairpin turns. if i overshoot a jump, i need to hit the brakes almost on a dime and be able to turn...that's not what i'm able to do. their too soft. it's like they take too long to respond.

so...when i went back to the sensorless motor, it was night and day, Brian. I wonder if maybe the novak motor is sketchy?

but it's brand new, barely one practice on it....it was on a ten scte.

fast foward a bit...i went to the track with my buddy and we were running identical B4 buggies wth the same motors, gearing, suspension, everything...except this time he was running the RS pro, and i was on another mmp.
my trinity D3 had less brakes than his D3. we took the laptop to check settings and it was all setup properly.

100% brakes, sensored only, 10 degrees timing, everything else was default on the mmp...even the brake curve. I even had the local track pro check my radio. he said it was perfect.

the only thing that made the brakes better was to run the linear brake curve like a vertical line.

so....while i know the sensorless motor i have works better in my mmp, i still have yet to know why his rs pro has better brakes than my mmp.

i'm baffled.

E-Revonut · 04.16.2011, 08:55 AM

I run sensored motors on my MMPs for racing as well. In my SC10 and B4.1 the brakes are pretty good, but they aren't as good as when running a sensorless motor. Both are running Ballistic 17.5 right now and I have run 13.5 for outdoors. However my 1s MMP in my carpet car with 17.5 or 13.5 has THE WORST brakes ever! I would think that in suck a light car it would be able to just lock up the tires...nope! Barelt stops the car. Even if I'm doing about 3-5MPH is still takes a good 10-15 feet for the car to stop.

I really don't understand why braking with sensored motors is so much weaker but maybe because they have smaller rotors made with weaker magnets.

DwightSchrute · 04.16.2011, 11:05 AM

Quote:

Originally Posted by E-Revonut

I run sensored motors on my MMPs for racing as well. In my SC10 and B4.1 the brakes are pretty good, but they aren't as good as when running a sensorless motor. Both are running Ballistic 17.5 right now and I have run 13.5 for outdoors. However my 1s MMP in my carpet car with 17.5 or 13.5 has THE WORST brakes ever! I would think that in suck a light car it would be able to just lock up the tires...nope! Barelt stops the car. Even if I'm doing about 3-5MPH is still takes a good 10-15 feet for the car to stop.

I really don't understand why braking with sensored motors is so much weaker but maybe because they have smaller rotors made with weaker magnets.

thanks for the post. that's exactly how i feel. maybe the answer is to try and find a 4 pole,high kv motor for racing my b4 and b44 and just abandon the sensored motors.

snellemin · 11:32 AM

I'm using a 3.5T X11 LRP motor in my FLM Rustler with some big tires. Brakes are very good, even with that crazy silly setup. Rotor is 14mm. Gearing 86/9 32P, or something like that running on 2s. The MMpro has no problems stopping that sucker.

Rustler is the one in red.