Invoice # 812405
ordered June 18, 2015
The servo, which initially worked, has gradually developed an intermittent failure to turn the gear set. The motor runs, but the gears do not move. If I "assist" it by hand it will sometimes unstick for a while.
This may be a problem with this model. I had previously purchased the same motor from another source, and it failed the same way, eventually never turning the gear set..
Running off the 5v output of an Arduino Micro, which is in turn supplied by a 9v battery.
FS90R Continuous Rotation Servo fails
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Please be positive and constructive with your questions and comments.
- adafruit_support_bill
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Re: FS90R Continuous Rotation Servo fails
Does the problem persist if you run the Micro powered via USB?
- DaveKay
- Posts: 6
- Joined: Fri May 08, 2015 11:17 am
Re: FS90R Continuous Rotation Servo fails
Yes.
I run it for a few turns in each direction (+/- 30 degrees from 90), with pauses. Code below:
I run it for a few turns in each direction (+/- 30 degrees from 90), with pauses. Code below:
Code: Select all
#include <Servo.h>
Servo myservo; // create servo object to control a servo
// twelve servo objects can be created on most boards
int pos = 0; // variable to store the servo position
void setup()
{
myservo.attach(9); // attaches the servo on pin 9 to the servo object
}
void loop()
{
myservo.write(90);
delay(2000);
myservo.write(120); //ccw
delay(2000);
myservo.write(90);
delay(2000);
myservo.write(60); //cw
delay(2000);
myservo.write(90);
delay(2000);
}
Last edited by Franklin97355 on Thu Jul 23, 2015 5:14 pm, edited 1 time in total.
Reason: Added [code] tags
Reason: Added [code] tags
- adafruit_support_bill
- Posts: 88093
- Joined: Sat Feb 07, 2009 10:11 am
Re: FS90R Continuous Rotation Servo fails
So the motor is spinning, but the output shaft does not move? What do you have the servo shaft connected to?
- DaveKay
- Posts: 6
- Joined: Fri May 08, 2015 11:17 am
Re: FS90R Continuous Rotation Servo fails
There is nothing on the servo shaft.
The (apparently) brass gear on the motor shaft is not driving the nylon gear set at all.
My guess is that there is too much play in the gear that meshes with it.
The (apparently) brass gear on the motor shaft is not driving the nylon gear set at all.
My guess is that there is too much play in the gear that meshes with it.
- adafruit_support_bill
- Posts: 88093
- Joined: Sat Feb 07, 2009 10:11 am
Re: FS90R Continuous Rotation Servo fails
If you contact [email protected] with a link to this thread we can send a replacement.
- DaveKay
- Posts: 6
- Joined: Fri May 08, 2015 11:17 am
Re: FS90R Continuous Rotation Servo fails
Great. Thanks for your help!
- DaveKay
- Posts: 6
- Joined: Fri May 08, 2015 11:17 am
Re: FS90R Continuous Rotation Servo fails
Thank you for the replacement unit. Unfortunately, it has failed in the same way.
Speculating as to cause: While there is no load in the current setup, it is possible that the motors were briefly (<2s) stalled during mechanical tests when the shaft was out of alignment.
I would not think that a stall should cause a gear train failure, however. Is it your experience that stalls damage micro servo motors?
Speculating as to cause: While there is no load in the current setup, it is possible that the motors were briefly (<2s) stalled during mechanical tests when the shaft was out of alignment.
I would not think that a stall should cause a gear train failure, however. Is it your experience that stalls damage micro servo motors?
- adafruit_support_bill
- Posts: 88093
- Joined: Sat Feb 07, 2009 10:11 am
Re: FS90R Continuous Rotation Servo fails
Unfortunately, yes. The gear trains on the micro servos are pretty delicate - even on some of the expensive, premium brands. I've stripped more than a few myself.
The metal gear models are more robust. But I don't know of any continuous rotation metal gear micros offhand.
If you contact [email protected] we can issue a refund for the servo.
The metal gear models are more robust. But I don't know of any continuous rotation metal gear micros offhand.
If you contact [email protected] we can issue a refund for the servo.
- DaveKay
- Posts: 6
- Joined: Fri May 08, 2015 11:17 am
Re: FS90R Continuous Rotation Servo fails
Thanks for the help.
Please be positive and constructive with your questions and comments.