Go Back   oOple.com Forums > General > Electrics

Reply
 
Thread Tools Display Modes
  #1  
Old 18-08-2015
paulainscow paulainscow is offline
Member
 
Join Date: Dec 2013
Posts: 131
Default Help please on over heating motor issue

Hi there

Im running a Speed Passion combo of Reventon Pro and 6.5t motor. The firmware is fully up to date.

I have gone through 4 motors in a few months on what seems to be an over heating issue. I have replaced the ESC yet last night it cooked another motor. Im running low boost and mid range braking. The car seems to have decent air flow from a few cut offs, and theres no obvious cabling issues or loose connections.

The motor now wont pull away, but if I press the throttle, then manually spin two wheels it kicks in, almost like its killed the sensor boards.

The mesh seems fine, and its geared on a 23 tooth pinion.

I run indoors so it is quite warm. Last night as the car cut out, the temp gauge showed it at mid 130 degrees, and the ESC was fine for heat.

If anyone can give me any pointers on how I can prevent losing yet another motor, it would be very much appreciated.

I am at work at the moment, but can post pictures of the internals of the car so you can see how its set up tonight

Thanks so much in advance
Paul
__________________
Back racing after a 10 year gap.... And loving it!

Currently running Schumachers Cat K1 Aero and Cougar KF, with my son running the Cat K1
Reply With Quote
  #2  
Old 18-08-2015
Xracer's Avatar
Xracer Xracer is offline
Member
 
Join Date: Jul 2014
Location: Derby
Posts: 162
Default

What static motor timing and boost timing are you using?

The two values added together should not exceed the maximum recommended timing for the motor!

I assume all of the transmission/bearings are free running and the belt is not over tight?!
Reply With Quote
  #3  
Old 18-08-2015
paulainscow paulainscow is offline
Member
 
Join Date: Dec 2013
Posts: 131
Default

Thanks for taking the time to reply

I will hook the ESC up tonight and reply with the full settings, as to absolutely honest, being still new to this scene I have no idea.

Both belts are a nice tension, not tight at all. Front diff is slightly hard, but nowhere near enough to cause issues I would think. Running a pretty standard oil in both, and regularly clean and service them
__________________
Back racing after a 10 year gap.... And loving it!

Currently running Schumachers Cat K1 Aero and Cougar KF, with my son running the Cat K1
Reply With Quote
  #4  
Old 18-08-2015
cmgreen's Avatar
cmgreen cmgreen is offline
Mad Member
 
Join Date: Dec 2006
Location: Gods Country-Tyne & Wear
Posts: 1,114
Default

You may be well over geared...

95 spur and 23 pinion is a ratio of 7.43
98 spur and 23 pinion is a ratio of 7.67

I would try a 19 see what happens from there
__________________
'There are two choices in life-Take it or leave it !'

Yokomo - Nemoracing
Sb Designs
http://www.fairfueluk.com/
Reply With Quote
  #5  
Old 18-08-2015
Dkfream's Avatar
Dkfream Dkfream is offline
Senior Member
 
Join Date: Apr 2014
Location: co durham
Posts: 520
Default

It has to be a gearing issue Paul, I run the same kit with ridiculous amounts of boost and never have a heating issue or motor issue, with you having to manually spin the wheels to move have you checked sensor cable and the solder joints on motor wires both ends, if one is a dry joint you will have to push car to get to work !!!
__________________
Schumacher K2
Schumacher KC
Hobbywing XR10 Pro V4 - Xerun V10 - Sanwa - Highest HV



www.racing-cars.com
Reply With Quote
  #6  
Old 18-08-2015
paulainscow paulainscow is offline
Member
 
Join Date: Dec 2013
Posts: 131
Default

Ive checked, and replaced the sensor cable and its ok. I have a spare motor which is a 10.5t and when connected to the existing wiring it runs fine, then as soon as put one of the problem ones back in, it wont fire without pushing the wheels off

Ill get a 19 pinion. What spur would you suggest, and Ill try that at same time too?
__________________
Back racing after a 10 year gap.... And loving it!

Currently running Schumachers Cat K1 Aero and Cougar KF, with my son running the Cat K1
Reply With Quote
  #7  
Old 18-08-2015
beale's Avatar
beale beale is offline
Senior Member
 
Join Date: Apr 2011
Posts: 371
Default

Sounds like you've lost a phase in the motor i.e burnt out a winding so probably a lost cause, I have a heat issue with a SP6.5 in a DEX410 but only when using shorties saddles are fine? Yes bizarre 3 different shorties same problem but must have something to do with C rating and gearing as everything is free running when motor removed.
Reply With Quote
  #8  
Old 18-08-2015
SlowOne SlowOne is offline
Mad Member
 
Join Date: Oct 2007
Posts: 1,549
Default

I think the clue is in the word "braking". When you brake a BL motor it has to fire the coils to work. That generates a lot of heat. If you have drag brake set then take it off. Try just using the brake manually when needed.

If you combine that with your potential over-gearing and over-timing issue, then it would be my view that you are bound to fry the motor every time. HTH
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 02:46 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
oOple.com