@WBS00001, @CochranRobotics:

I missed that, can someone post the link (digital servo announcement).

generally speaking:

both servos have Gears and analog Potentiometers both use PPM signals both use string of pulses to move the motor to the desired position.

The main difference is the servo electronic (inside the servo) http://www.futabarc.com/servos/digitalservos.pdf

analog servo: controlled via custom chip 50 Hz pulses

digital servo: controlled via a micro controller. 300 Hz pulses

A digital servo allows higher motor updates (300 Hz) which gives more precision, fast control, constant & high torque

BUT there are some complains much more noise, more power consumption.

Every servo is different, and each manufacture has their secret servo algorithm, and different hardware quality,

the biggest issue is the power.

I have doubts if is a good choice for small battery robots.

I wasn't for sure if it had been posted or not on the forum but here is another thread making reference to the fact that EZ-Robot has been working on these.

https://synthiam.com/Community/Questions/6768

It is evident that the digital servos were announced at some point due to the comment made by WBS. I can say that what I have been told is that these servos were/are very quiet. There may be other issues that I am not aware of.

Interesting. The board that runs the jaw sync for audio with the ALAN line of robots uses only analog servos. I tested an EZ HD servo with it (as I'm converting over the robots to EZ servos). The EZ servos would not work at all with the board. So I assumed that it was the servo was digital. Maybe it's another issue.

As far as a digital servo being quiet my experience has been opposite. When they hold a load every dog in the neighborhood barks!

That may be true. I didn't actually see these, but am just going off of what I was told. I can say that you can get good deals on the analog servos at Brookstone right now though

@fxrtst

Quote:

The EZ servos would not work at all with the board.

voltage problem ? I tried an EZ-Servo HD with 5V 10A, and the servo didn't work.

Quote:

As far as a digital servo being quiet my experience has been opposite.

my comment is related to the digital too: more noisy and use more power.

Google is your friend...

Sorted by time

Quote:

... We will be offering full range digital servos made specifically for ezrobot in our store in the new year.

Quote:

The micro servo we currently offer is actually a digital servo. Digital servos don't provide feedback to the controller unfortunately they just have higher resolution, holding torque, and are usually programmable to take different timing signals.

Quote:

All EZ-Robot servos in April will be a new digital version. They include safety shut off and do not emit any noise when holding position. Jeremie and James have just completed their final testing this week. Significantly different compared to the analog versions. Also, they are better aligned from factory and generally do not require servo profiles.

Quote:

... EZ-Robot has been working on a torque monitoring servo that also contains stall detection and heat detection. It's a digital servo as well. We have quite a few prototype, but still have a few more hurdles to accomplish before it is available to the public. ...

the last post is really good news, it will solve common problems.

I'm working on a solution to manage the stall detection (Gripper), and is not easy with an analog a servo.

EDIT Gripper has a micro servo (digital)

Thanks for all great info. I checked and you are correct. It's a power issue. The board only supplies 5 to 6 volts directly to the servo. I would have to power the servo separately to use them.

Interesting that the micros are digital and the big ones are not. But explains the price differences in the two.