Asked
— Edited
I was about to order a couple of servos from the EZ store, but was shocked to see how much the shipping was from China. More than the cost of two servos. So i did a quick search and found Brookstone is offering buy one get one free on certain bits, ie servos orientation sensor etc. I ended up doubling up the servos for the same price from the EZ Store. Not sure how long the sale will last.
Don't order things you don't need, but if you order an uneven number of 2 items (ie 3 lever servos, and 3 rotation servos) you may end up with extras. They packaged items for storage in 2 packs, I guess expecting that everyone would order 2 of the same thing, but the BOGO is for any EZ-Bit, mix and match. I got an extra servo and an extra orientation sensor at no charge when I ordered from them.
Alan
The normal customer that purchased from Brookstone didn't do any research and thought that they were buying a toy more than an expandable robot. Because of this, there were more damaged parts and far more support given to these users. There were returns because the customer didn't understand what they were purchasing and didn't really fall into the education or hobby type customer that EZ-Robot is geared to working with. Brookstone didn't really have the staff to support this product because it isn't simply a "unbox and put batteries in" type product. They are not geared toward supporting a product that they sell as much as most re-sellers. I am sure that there were a lot of customers who loved the robots but from talking to EZ-Robot and talking to Brookstone, it simply wasn't a great fit. Most customers who buy something in the mall aren't the same customers who buy something to really mess around with, expand on and really get to know the inner workings of the device.
Anyway, you can find last years parts cheap at Brookstone right now. Last years parts are what is being sold by EZ-Robot right now, so if you can't wait, Brookstone is a good option. They do ship the products quickly and I have had no issue yet with any of these parts.
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.
http://www.ez-robot.com/Community/Forum/Thread?threadId=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.
As far as a digital servo being quiet my experience has been opposite. When they hold a load every dog in the neighborhood barks!
voltage problem ? I tried an EZ-Servo HD with 5V 10A, and the servo didn't work.
my comment is related to the digital too: more noisy and use more power.
Sorted by time
post #9
https://www.ez-robot.com/Community/Forum/Thread?threadId=6761
post #2
https://www.ez-robot.com/Community/Forum/Thread?threadId=6768
post #9
https://www.ez-robot.com/Community/Forum/Thread?threadId=8943
post #4
https://www.ez-robot.com/Community/Forum/Thread?threadId=9282
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)
Interesting that the micros are digital and the big ones are not. But explains the price differences in the two.