How to prevent Servo twitching?

[Shobhit Jaipurkar]

I have been encountering certain issues with the HK15298B servos for the fingers. (I am still powering the servos with 5v)

I notice that there is some severe twitching when I power up the servos. While the movement is smooth and accurate for one finger, whenever I define multiple fingers, the servos continually twitch until they come to the 0 degree position (rest is 180 degrees for my hand), and then the program resets due to power issues.

Could you help me with this problem? I have a feeling this might be due to insufficient voltage being given to the servos but that doesn't really explain the soft reset. Is this a problem with the servos or my threading of the tendons, or is it just a voltage issue? 

[RobotGuy6]

Sounds like you have a power problem... More specifically not enough of it... What is the amp rating of your 5v power supply?

[Perry S]

Without hearing more I can say you have a problem with not supplying enough current. RobotGuy6 and I answer this question once a week. Que him posting a link to the power supply he bought on ebay (which I am getting now)

[gael langevin]

Also make sure your servos are grounded to the Arduino and the power supply.

Gael Langevin

Creator of InMoov

InMoov Robot

@inmoov

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[Shobhit Jaipurkar]

Thanks for the immediate and prompt response! I will change the voltage to a 6v one and try. Does this mean that I do not need any specific servo motor drivers? I had a feeling that the twitch was because of a clocking mismatch between the Arduino and the Servo. (I'm using a Mega instead of the Uno for the hand)

[RobotGuy6]

If you are using the standard arduino servo library then how would that be possible? An Arduino will drive any hobby servo just fine.... I am still saying your issues are power or lack of common ground....