MMPro question
 

Hi,

I have this setup:
MMpro, 0 punch, medium start power
1790kv 4 pole motor
Lightweight LST2: 5kg rtr
Geared for 30mph, on 5s4000mah45c

The truck hesitates to take off. If I start really slow on the throttle the car starts moving and if I then apply more throttle the car will take off.

But if I try to take off with more or half to full throttle the truck just crawls. I have tried 0, 5 and 10 degrees timing with no effect.

Once the trucks drives normally there's no problems at all.

Any idea what could cause this? It can't be the battery because it works fine in another setup with a MMM.

Hmm...look at all your connections really well. Motor to esc, battery to esc and make sure they are tight and not loose if they are bullets. If you have some resistance in the system somewhere it can cause stuttering/cogging.

That's the first place to look, if all seems well then I would try to swap with your MMM and see if the problem goes away. If it doesn't then I would say the motor might be suspect somehow.

Just removed the pinion and pushed the truck around. Didn't feel like there was any binding. Also pulled all the connectors hard. They're all firm, so maybe a cold joint.

I remember I had the same thing with this controller on a different motor, a 6 pole.

Really don't want to resolder all the connections right now...

Oh yea I forgot to ask, what firmware version are you using? Anything beyond 1.24 has always had major throttle problems. My MMM was having throttle glitch issues just like you say after I upgraded to the latest firmware and I did not know that was the problem till I read on the forums of other people having the same problem so I went back to 1.24 and the problem went away.

I was on 1.32
Went back to 1.24 and looks like it solved the problem.

THANKS!

Castle, please look into this.

No problem, glad I could be of help :great: As soon as I received my MMPro and put it in my evader I upgraded to the latest firmware but did not like how on startup it would surge the throttle when trying to crawl around. Went back down to 1.24 I can now drive around my evader at a baby's pace with no constant surging.

Some here and i stay on the 1.22 firmware ...
Works but just bad for Torque Control