Maker Pro
Maker Pro

brushless gimbals

J

Jamie M

Jan 1, 1970
0
Hi,

I am looking into a gimbal mount and came across these brushless gimbals
for R/C quadcopter video cameras:

http://www.ebay.com/itm/DJI-Phantom...-Motor-Controller-for-Gopro-3-2-/370894124775

Apparently the brushless motors are similar to brushless outrunners
from R/C, but are rewound so they are useable as gimbal motors.
I was wondering how they would be rewound likely? Also what would
the expected angular resolution of a motor like this be? Also could
"regen braking" be used to operate the gimbal in a quick oscillation
mode for 2D laser scanning?

cheers,
Jamie
 
J

Jamie M

Jan 1, 1970
0
Hi,

I am looking into a gimbal mount and came across these brushless gimbals
for R/C quadcopter video cameras:

http://www.ebay.com/itm/DJI-Phantom...-Motor-Controller-for-Gopro-3-2-/370894124775


Apparently the brushless motors are similar to brushless outrunners
from R/C, but are rewound so they are useable as gimbal motors.
I was wondering how they would be rewound likely? Also what would
the expected angular resolution of a motor like this be? Also could
"regen braking" be used to operate the gimbal in a quick oscillation
mode for 2D laser scanning?

cheers,
Jamie

Well I did some more research and they are just rewound for more torque
(more wires) to hold the camera in position. Also the speed controller
is probably just a normal speed controller with the addition of PID
feedback. Any idea on the positional accuracy these motors could have?

cheers,
Jamie
 
L

Lasse Langwadt Christensen

Jan 1, 1970
0
Den torsdag den 26. september 2013 20.49.48 UTC+2 skrev Jamie M:
Well I did some more research and they are just rewound for more torque

(more wires) to hold the camera in position. Also the speed controller

is probably just a normal speed controller with the addition of PID

feedback. Any idea on the positional accuracy these motors could have?

they basically use them as stepper motors, low number of steps and microstepping probably more smooth that a usual stepper

the rewind is probably to get torque at a reasonable current for the
driver, many BLDC are tens of turns, <1R, tens of amps

the absolute accuracy is probably not very good, just like steppers
the accuracy when micro stepping isn't very good but non-cumulative
from one step to the next.

with feedback probably very accurate

-Lasse
 
Top