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Eagle Tree Systems Onboard data loggers, telemetry, and OSD support


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Old 07-13-2009, 09:19 PM   #1 (permalink)
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Default Brushless Motor Calibration

I've got everything hooked up correctly for the brushless sensor (at least I think so). I am getting readings on the rpm, but they are WAY off. It's saying 3000ish when I know it's probably around 2100. When it asks for the poles, I am taking that from the Scorpion 890 data and entering 12. Then on the gear ratio conversion, I am taking the 170 tooth main pinion for a trex 600 and dividing by the 13T pinion I have.

Any suggestions for what I might be doing wrong here?
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Old 04-18-2010, 11:13 AM   #2 (permalink)
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Question

I'm having the exact problem .....
Trex600 with 12s
scorpion 4025-630 (8 poles)
Main gear 115T - Pinion 11T - ratio=10.454545
ESC Kontronik Jive 120+

I have swithed the wires between the ESC and Motor a few times......
I even tried it with a different motor (4035-630 with 10 poles) but the same problem.

when my friend download the data on his laptop he gets the same readings....
So i think there is nothing wrong with the software or laptop.

With a Skytach gauge I get ; 2130 rpm.... BUT THE EAGETREE says 3400 rpm....
i'm sure the Eagletree is wrong.


But WATs the PROBLEM ???????

Please help me.....
Marco
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Old 05-03-2010, 03:01 PM   #3 (permalink)
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try to enter as 10 poles
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Old 05-12-2010, 06:03 PM   #4 (permalink)
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I think the problem lies with the Kontronic, I solved my problem by just using one wire for sensor. You need to test what wire and to what cable on the motor.

Felipe
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Old 04-08-2018, 12:41 PM   #5 (permalink)
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Hey guys, I have the Eagle Tree software reading the motor with the brushless sensor but I don't understand what each of the calibration settings do. Could somebody please help?

The motor has 32 magnets, 16 pair poles.
The motor has an internal gear reduction ratio of 5:1
The wheel diameter is 20"
RPM (at the wheel) should be about 140, multiplied by 5 this is 700 at the motor. The readings I'm getting are in the thousands though.
For more info on my project: Wiring for the Mountain Wheelchair is Coming Along | Mountain Wheelchair
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