bigemike

iTrader: (36)

http://cgi.ebay.com/Gauss-Meter-Magn...QQcmdZViewItem

do you think this would work, they say they use them to match slot car motors?

ta_man

iTrader: (168)

It says:

The meter might be out ranged by some Neo traction magnets used in 1/32 scale cars.

If that is the case, it is pretty likely that the powerful Neo magnets used for our brushless motors will also exceed its range.

bigemike

iTrader: (36)

It didn't know what magnets were in the motors, but I know that the range would need to goto 2500~ range to work.

syndr0me

iTrader: (32)

I'm curious if this thing does a decent job. I don't need exact number, I just need to know when a rotor sucks and when it doesn't. I can't remember which ones are new.

http://rc4less.com/Motors,_Brushed_&...duct_info.html

I decided to take a chance and order one. I'm not expecting much, so if it works at all, I'll be pleasantly surprised.

robk

iTrader: (22)

I know some of the numbers quoted to me by guys at the Novak were ~1300, so that ebay meter may work (-1600 to 1600 range). I don't know if $129 is a good price to find out though.

joe of loath

iTrader: (1)

the 'neo traction magnets' they mention are the super powerful neodynium magnets on the bottom of slot cars for holding the car onto the track. more powerful than RC motor magnets by far!

James35

iTrader: (1)

It's spelled Neodymium (A.K.A rare earth). Today's brushless rotors are made with Neodymium.

syndr0me

iTrader: (32)

The Zubak meter seems to be what all the oval guys use. At $279, it's pricey. I'm hoping that RC4LESS meter just lets me know when one is good or bad, I don't care about racing numbers. I'm not convinced the very most powerful rotor means a thing. I do think extremely weak rotors can be a problem, though.

http://www.hobbytalk.com/bbs1/showthread.php?t=187017

JevUK

Would it not be easier to measure the torque required to spin rotor while it is still inside the motor?

To compare different rotors anyway.

I do a rough feel test but I wonder if their is a very sensitve torque gauge available somewhere.

Something like this http://cgi.ebay.co.uk/Tohnichi-BTG-B...QQcmdZViewItem

joe of loath

iTrader: (1)

close, i didn't have my periodic table to hand