motor cogging issues
 

im running a castle sidewinder (original) and a 1/10 velenion 3500 motor in my 1/16 slash. yes its absolutly insane, but its a lot of fun. anyways, to the point, im having problems with cogging. on one stock traxxas battery (1200mah) it would stutter real bad from a stop at hard throttle, sometimes not even hardley move. if rapidly pulled and l;et of the trigger it would get out of the dead spot, take off and go. i figured i had battery issues so im now running 2 in parallel, the problem changed completely. now from a dead stop it takes off like a bat outa hell, however when im slowly rolling and hit the throttle it stutters and comes to a stop. if im rolling and feather the throttle itll pick up and go. i thought again batteries may be the issue, however i tied a 4200mah 2s lipo to it with no change whatsoever.

right now ive got the esc set up to save the drivetrain as much as possible. ive got punch control at 50%, timing at 0 and reverse power at 50%. i havent gone through the process for the torque limiting settings. i have tried changing gearing with no change.

anyone have any advise? in 13 years in the hobby this is the first time ive had a brushless setup (had the sidewinder in a crawler for 5 years). i know a sensorless brushless setup will always have some cogging, however this seems excessive. had a chance to run a friends 1/10 slash with complete velenion system and its nowhere near what mine is like for cogging.

Sensorless systems cog. The only way to eliminate all of the cogging is to get a sensored system.

i know all sensorless brushless systems will have some cogging, however this just seems excessive. as i said before, im comparing it to a 1/10 slash vxl with the velenion esc and motor, that has a slight bit of cogging on take off and cleans right up.

Disable punch control, set your start power at high and use good batteries

Once you calibrate the ESC with trims / EPA's set correctly you may eliminate some cogging by adding a small amount of throttle trim

Cheers

Does your friend's vxl have a lower gear set than you? High gearing will cause heavy cogging at low rpm. Never mind...you did try different gearing.

i have played around with gearing. also keep in mind this is a 1/16 scale mini slash with a 1/10 scale velenion 3500. ive been told run any gearing you want because it wont get anything even warm due to the small size and weight.

The vxl system I have cogs at low rpm. Then I swapped it out for a sensored system. Smooth now!!