Help please!! 1st BL experience going south - RC-Monster Forums

sapper_triple6 · **Help please!! 1st BL experience going south -** 02.24.2007, 07:58 AM

I was running my e-maxx last night for only the 2nd time and I was having bad cogging problems. Then after about approx. 5min smoke shot out from under the body so I immediately shut down. I was running a 9xl on 16 elite 3600 cells with a 16tooth pinion, strobe slipper, and hb diffs. after everything cooled down I plugged it back in and ran it on my stand and it still seems to work. Motor temps got extremely high, about 290f. The first time I mounted the motor the stock titan screws were toolong and I put them in a little far. Could I have damaged somethng then and it is now causing me all the problems?

Serum · 02.24.2007, 08:04 AM

Are you using an external UBEC/receiver pack? what controller are you using?

Serum · 02.24.2007, 08:04 AM

If it's a warrior, you need to use an external BEC above 12 cells.

sapper_triple6 · 02.24.2007, 08:07 AM

sorry forgot to mention that part. It is a 9920 and yes I am running the UBEC.

Serum · 02.24.2007, 08:17 AM

Where did the smoke cam from? the larger Ubecs Mike carries tend to give some smoke from time to time.

Any melted heatshrink on the controller or ubec?

A hot motor; you might want to check on the connection from the controller to the motor. The cogging/heat might be the result of 1 poor connection. I had issues like you are describing, and the problem was that 1 of the 3 magnets on the XL motor turned around.. Giving the motor poor power, cogging (distortion of the EMF feedback) and a lot of heat.

sapper_triple6 · 02.24.2007, 08:21 AM

The heatshrink on the controller is partially melted and all distorted. The ubec is fine.

Serum · 02.24.2007, 11:05 AM

A hot motor; you might want to check on the connection from the controller to the motor. The cogging/heat might be the result of 1 poor connection. I had issues like you are describing, and the problem was that 1 of the 3 magnets on the XL motor turned around.. Giving the motor poor power, cogging (distortion of the EMF feedback) and a lot of heat.

sapper_triple6 · 02.24.2007, 11:18 AM

I checked the connections and they seemed to be fine. When I get a chance tonight I will re-solder them and see what happens.

Serum · 02.24.2007, 11:22 AM

Okay, one other thing before you jump the Weller; Check for binding in the drivetrain.

sapper_triple6 · 02.24.2007, 11:43 AM

already checked that everything is running smooth. could I have possibly damaged the motor with longer screws the first time I mounted it?

Serum · 02.24.2007, 11:49 AM

Yes, using long screws is a way to ruin a motor. Can you check how long they are and how far they stick in the motor.?

sapper_triple6 · 02.24.2007, 11:52 AM

I got rid of the longer screws after i tried mounting it the first time but I did screw them in pretty far. They were stock screws for the titans. The screws I am using now are working just fine.

sapper_triple6 · 02.24.2007, 11:54 AM

I tried running it with the long screws and it didnt want to move at all though.

Serum · 02.24.2007, 12:07 PM

Yep, sounds like you damaged the windings!

worst case the controller is damaged too.

squeeforever · 02.24.2007, 12:10 PM

Yup. You damaged the windings for sure. Don't feel bad, I did it to a $150 Lehner a couple years ago.