testing motor rpm

[Steven Vaccaro]

I'm trying to play with one of these.

My test motor is a leopard 4 pole 3674 2200kv motor.
My question is the poles. The guy in the video says to count the magnets and divide by two to get the poles. If I do that with the Leopard motor it comes out to 12 / 2 = 6 poles. But with testing this cant be right. I tried a 6 pole aquacraft motor and there seems to be 18 magnets. So is he mistaken and we should be dividing by 3, or am I missing something else?

[dana]

well if you divide by 3, is comes out rite… so if i had to guess… i would say he is mistaken. not that i know for sure

[m4a1usr]

Steve

The instructions arent clear and you have to play with it a bit to understand its functions. There are 2 buttons on the right hand side. With battery power applied, you can press the bottom lower button and select the number of poles you have. It will then function normally when it calculates Kv based on RPM/Voltage input. I had forgotten how to use this critter correctly.


John

[m4a1usr]

Here is how I have mine setup. Made some simple connectors/adpaters per motor requirements. Shown are the 5.5mm bullet adapters.

John

[Steven Vaccaro]

thanks for the pictures.

I understand the unit. I'm just missing something with how the magnets work.

If I have 12 "notches" I think I have 12 magnets or 6 pairs. But it doesn't seem to work that way with the meter.

[m4a1usr]

thanks for the pictures.

I understand the unit. I'm just missing something with how the magnets work.

If I have 12 "notches" I think I have 12 magnets or 6 pairs. But it doesn't seem to work that way with the meter.

Did you start testing with the Kv checker set at the number of actual poles of the motor in question?

John