Australian RC Forums banner
1 - 9 of 9 Posts

·
Registered
Joined
·
405 Posts
Discussion Starter · #1 ·
I was working on my TXT-1 kit tonight, and I was putting the two motors
on the motor plate, and aligning their pinions with the spur gear, and
I couldn't find an allen key that would fit snuggly into the Robinson
Racing 9t pinion grub screws - seemed like a non standard size??
So
I thought - why don't I just put the stock 15t pinions on for now, and
work it out later - so I put them on fine - direct connected the motors
to a 7.2 battery (Is this bad?) and the motors both spun up fine. Then
I mounted the spur and set the Pinion spur distance. If I have
only either the left or the right pinion touching the spur it'll spin
it - but if I set both on it - when I connect the battery - the motors
just sit still not moving and get hot.
I checked and they're both
spinning the same direction. Any ideas to what's happening?


 

·
Registered
Joined
·
405 Posts
Discussion Starter · #2 ·
It's almost like the motors are spinning in opposite directions.
But they can't be - they're both wired up identically!


Again this morning I tested - no spur(both motors spin fine) - right
motor on spur(spins spur) -left motor on spur(spins spur) both motors
on spur - humming noise and sparks and wires get hot?




I probably should have done this earlier, but I'm going to try getting
to a LHS and buy myself a Tamiya battery plug for my ESC so I can hook
the Super Rooster properly to the motors rather than touching a battery
terminals on their deans plug.
 

·
Registered
Joined
·
472 Posts
u say they are both spinning one diection but shouldnt the be spinning oposite so the left one is goign clockwise and the right one is going anticlockwise, therefor both are spinning the spur? or was that what you were trying to say...cos if they were both spinning anti clock wise they would cancel each other out
 

·
Registered
Joined
·
47 Posts
Hey,


Jono is right, The motors have to be spinning in opposite diresctions to allow the spur gear to spin freely. I am not sure how you will be wiring your mtors (parrallel or series) but you need to reverse the wiring on one motor for it to run in reverse i think.


If you r planning on making your txt-1 into a series crawler and havent already seen this i recommend you do the the mods mentioned on the webpage link below.


http://www.rccrawler.com/article2.html


I have a rcguy gecko 2 and love my crawler.


c ya
 

·
Registered
Joined
·
405 Posts
Discussion Starter · #6 ·
Ok, if you look at the photo I have above with the arrows on it. If one
pinion spins clockwise, and the other spins anticlockwise - they're
just going to push the spur from opposite directions causing no
movement whatsoever.



In a clod based crawler you use a reverse motor because they're mounted to the axles and they face different directions.



On futher investigation my motors are spinning in opposite directions
despite my ordering 2 x normal Magnetic Mayhems. So I'm just going to
try running the 1 x motor with the normal rotation.
 

·
Registered
Joined
·
472 Posts
if one of the motors is spining in the wrong direction, could it be wired wrongly? if it isnt (noob at elec so excuse the next comment) can you run the motor on reverse polarity?Edited by: JoNo-vs-SAVAGE
 

·
Premium Member
Joined
·
6,579 Posts
jerrah said:
...my motors are spinning in opposite directions despite my ordering 2 x normal Magnetic Mayhems.

Could well be you've replaced that endbell (that came loose earlier) the wrong way round.


Turning the endbell around 180 degrees is the same as swapping the cables. (Electricity don't know & don't care what colour the wires' insulation is.)


CONVENTION is, if you put +ve at the red wire, the motor should turn anti-clockwise when seen from the pinion end.





I don't know if the Magnetic Mayhem has any advance timing.


If they are zero timing (like a silvercan 540), you can run them in either direction.


Motors with advanced timing should not be operated in reverse - this is bad for them as it is very inefficient. If they have advanced timing you should "re-time" them correctly ie advanced in the other direction.
 

·
Registered
Joined
·
405 Posts
Discussion Starter · #9 ·
zoomer said:
Could well be you've replaced that endbell (that came
loose earlier) the wrong way round.
I presumed that the motor
could be reversed somehow like that, thanks Zoomer.


<>
zoomer said:
CONVENTION is, if you put +ve at the red wire, the
motor should turn anti-clockwise when seen from the pinion end.
Unfortunately it's the motor that I had to put back together
which is turning anticlockwise, and the motor which came intact is a
clockwise motor. This is all very strange.
I'm not sure what the
timing on the MM's is, but I'm pretty sure that they're not zero
degrees.

</>
 
1 - 9 of 9 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top