cutting flatspot help..... - Page 2 - RC-Monster Forums

Dafni · 06.13.2005, 09:30 AM

When I grind the shaft I cover the screw-holes and bearings with tape, to keep shavings out.
Putting the motor in a plastic-bag and sticking the shaft thru it works as well.

Remember: Metal-shavings plus Magnet equals Headache!

06.13.2005, 12:50 PM

Quote:

Originally posted by scoobie doobie
Dont know where I would be without my trusty Dremel...you dont have to get a Dremel brand either, you can get cheap rotary tools almost anywhere now...

I bought this one. Pricing them, I was looking at Home Depot and they sell the flex shaft for $30 alone. The case it comes with is nice too.

Guide Gear Rotary Tool

Serum · 09:50 AM

Yeah, dremel (clones) can't imagine my life without them.. It enriches your life.. it's allmost as famous as 'googling'...

Those hints Dafni posted are very good to keep in mind indeed.

maxxdude1234 · 06.14.2005, 12:57 PM

thanks for the help and tips guys. I brought an aluminium oxide griding wheel - meant for the dremel. Gonna use it in a drill (I don't have a dremel). Hopefully I'll be able to buy some kind of rotary hand tool at some point, they seem so useful. But after shedding out lots of money on my brushless system, I'm taking a bit of time out....;)

RC-Monster Mike · 06.14.2005, 05:08 PM

The drill will work fine. It will just take a little longer (less rpms).

maxxdude1234 · 06.14.2005, 05:31 PM

cool, thanks. I'm definately gonna take into account dafni's suggestion, about covering bearings and holes.

maxxdude1234 · 04:02 PM

just to report to you guys. Ground the shaft, works absolutely fine and holds the pinion nicely.

Just ran my bl maxx for the first time (2000XL/7018/18cells)...All I can say is wow!!! I was cruising along on asphalt in 2nd gear at about 10mph, jammed on the throttle (not all the way), and the truck just lit up. The front end rose off the ground, and the rear twisted round as the tires began to baloon, and I must have been doing over 30mph within a couple or seconds.

After a 5 run the batts were still cold (indicating they have hardly had to chuck out any current and still have loads of charge left), the 7018 was barely even warm, and the motor was fairly warm. From listening to the truck accelarating hard in 2nd gear, I think I can hear the slipper clutch slipping a bit. I'm running a stock slipper with 12pegs, but I'm going to tighten it all the way down - I don't do much jumping, so it shouldn't matter.

Thanks for all your help guys, and special thanks to mike for helping me out with choosing the right set-up and organising shipping direct from bk - cheers!! :D

Serum · 06.15.2005, 04:08 PM

YEAH! those large amount of cells do rock!!!

can you shoot a vid of it in action?

maxxdude1234 · 06.15.2005, 04:15 PM

I will try to get a vid of it in action. Only problem is the only thing I can use to take vid's is a digital camera. The quality is very low, and there's no sound. I'll still try to take one, and post it up here.;)

Serum · 06.16.2005, 02:07 AM

I have never seen an XL2000 on 18 cells, so i am happy with a poor quality movie...

maxxdude1234 · 06.17.2005, 02:08 PM

Just got back from a run. The temps outside are about 30degrees celcius....so hot. After no more than 4-5minutes running the motor was very very hot. I couldn't keep my hand on it for longer than 3 seconds. I noticed that one tooth had been stripped off the spur gear. Could this have caused the motor to overheat, or is it likely due to the high outdoor temps. I have it geared 16/72 on a 10lb-ish maxx, is this geared to high? Or is it quite normal for brushless motors to have much higher temps than brushed motors?

Gonna try again later with 15/72, and the outdoor temps should have dropped by then - 24degrees ish.

Thanks

RC-Monster Mike · 06.17.2005, 06:15 PM

You are most likely undergeared, actually. I would gear up a few teeth (try 20/72 or 22/72 even). On a hot day, the motor will run pretty warm, especially if you are accelerating hard often. Make sure you get some air flow over the motor as well to help keep things cool.

maxxdude1234 · 06.21.2005, 05:35 PM

Sorry to drag this post up again. I got an IR temp gun today. My set-up is 2000xl/7018/18cells geared 18/72 in a 10 1/2 (ish) maxx.T he outside temp was about 80*F

After 15 minutes of some hard running in a parking lot (lots of high speed runs), the motor was 175*F, the batts were about 100*F and I don't know if the 7018 was even working, it felt so cool, about 90*F......:cool: . Mike, you reccomended looking at a 20,22/72 ratio, with this data, would you still reccomend it?

cheers

Dafni · 06.21.2005, 05:41 PM

Great news, man. Glad to hear.

How can you fit an 18t pinion and a 72t spur? (no stock plate, I guess?)

I'm looking forward to try my sparkling brand new XL2400 on 14 cells.

maxxdude1234 · 05:44 PM

Quote:

Originally posted by Dafni
Great news, man. Glad to hear.

How can you fit an 18t pinion and a 72t spur? (no stock plate, I guess?)

Enter the dremel...... :D

Enjoy the lehner btw...;)