Current draw of servos
Archiver
Posts: 46,084
It depends upon the servo. Some of them will pull upwards of 500 ma or more.
This has been an issue with micro electric airplanes as the servo draw will
starve the receiver or enough current. Other servos by the same size by a
different manufacturer will often not draw as much current. If I remember
correctly the units produced by GWS and sold under many brand names were the
worst. In slow fly circles it is not unusual to put a current limit resistor
in line with the motor to get around this problem. Also, adding a good size
cap to the power lines of the servos may limit the peak draw the regulator
sees.
Tim
[noparse][[/noparse]Denver, CO]
>
Original Message
> From: Don Brunner [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=pAhucwEm4putyKalgkBuWd9Mn0IEYQKbetHdxk2tjrSw19GcMfE0sFK15VSuw5fuGbBHJtdV]drb@c...[/url
> Sent: Saturday, October 07, 2000 4:10 PM
> To: basicstamps@egroups.com
> Subject: [noparse][[/noparse]basicstamps] Current draw of servos
>
>
> Does anyone know the current draw of a servo. I am using three of them
> in one project and they are overheating a 5V voltage regulator rated at
> one amp. I can not seem to find any doc's on it.
>
> Don Brunner
>
>
>
>
>
This has been an issue with micro electric airplanes as the servo draw will
starve the receiver or enough current. Other servos by the same size by a
different manufacturer will often not draw as much current. If I remember
correctly the units produced by GWS and sold under many brand names were the
worst. In slow fly circles it is not unusual to put a current limit resistor
in line with the motor to get around this problem. Also, adding a good size
cap to the power lines of the servos may limit the peak draw the regulator
sees.
Tim
[noparse][[/noparse]Denver, CO]
>
Original Message
> From: Don Brunner [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=pAhucwEm4putyKalgkBuWd9Mn0IEYQKbetHdxk2tjrSw19GcMfE0sFK15VSuw5fuGbBHJtdV]drb@c...[/url
> Sent: Saturday, October 07, 2000 4:10 PM
> To: basicstamps@egroups.com
> Subject: [noparse][[/noparse]basicstamps] Current draw of servos
>
>
> Does anyone know the current draw of a servo. I am using three of them
> in one project and they are overheating a 5V voltage regulator rated at
> one amp. I can not seem to find any doc's on it.
>
> Don Brunner
>
>
>
>
>
Comments
in one project and they are overheating a 5V voltage regulator rated at
one amp. I can not seem to find any doc's on it.
Don Brunner