Uncommanded servo twitch on powering up. No twitch in a Hyperion digital servo.

The servo on the left (yellow sticker) is a "Hyperion DS12ACP Digital".
The servo on the right (bigger servo horn) is a no name analog servo.

The Hyperion digital servo never makes any uncommanded movements.

I have also tested "Spektrum DS821" digital servos, they do make a small twitch on powering up.

This video is a follow-up to this: http://www.youtube.com/watch?v=INHMyLuQ8GA , where there was one know-it-all-dick "vizzuleyes" (claimed 19 years of RC experience) insisting that ALL servos have this behavior during power-up, even his "$150 jet servos".

Personally, I might never have a need to pay a lot just for this "feature" of the DS12ACP, but I imagine it might be useful for models with fragile landing gear setups. This particular servo is also supposedly programmable with their proprietary card so for things like a reduced maximum speed for landing gear. I've had these servos from long before I posted the first video: v=INHMyLuQ8GA .

Category:

Science & Technology

Tags:

• servo
• twitch
• RC
• radio control
• digital
• Spektrum
• Hyperion
• analog
• PWM