Motor trouble

[big_dave]

Ok, ive been using a Epic Binary2 9x1....it ran fine until i switched brushes.....the brushes that came with the motor were soldered on to the endbell, after about 12-15 runs they were worn out.....i didnt know how else to get them off except to cut them..... so i cut them off and theres still solder and some brush wire left on the endbell...so i went and put the new brushes in my motor..and it ran fine for about 3 mins then slowed down drastically....the endbell was extremely hot..but the rest of the motor was at normal heat.....i took a look at the brushes and after the first run they were already black/pink/purple/blue (discolored due to heat)......???????? would anyone have a clue as to what the problem is?

[sosidge]

Running a 9x1 it needs more than just new brushes. It will need a thorough clean, and ideally the comm cut as well.

A racer will never replace brushes without cutting the comm.

[big_dave]

i cleaned it with a comm pen.....how do i cut the comm? also, i used a brand new team orionrush 11x2 to see if the same thing would happen and it did same exact thing as the binary2...and remember the rush motor is brand new

[Dephcon5]

That 9 turn motor draws a boat load of current. Clean the comm again, if you cant cut it then use a 250 to 300 grit sand paper, pinch the sand paper on the comm with your thumb and index finger and spin it with your other hand. Try soldering the brush leads on as the originals were and use a soft brush compound with the original springs. And break in the new brushes with a single 1.5 volt battery for about 4 or 5 minutes. A good LHS should be able to do a basic rebuild if this fails for a reasonable fee.

[big_dave]

Thanks [] i will give this a try.....but there must be something else wrong too because when i ran the brand new team orion rush 11x2 it did the same thing as the older epic 9x1 would you happen to know the problem to that then too?

[theshopkeeper]

If the new motor had the same fault it suggests the gears are binding. Perhaps you need to check everything is free rolling in there.

[big_dave]

Yup this was the first thing i did.......nothing seems to be binding because i rolled it down a 2% downgrade......and if something was binding the whole motor would probably heat up instead of jus the endbell, thank you for your input []

[big_dave]

The rush motor is a machine wound motor and isnt constructed as well as the binary......could it be possible that the rush motor just cant handle the current thats going through it?