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Italy
Asked — Edited

Ezbuilder And Third Party Servos

I tested ezbuilder with hitec servos, and discovered ezbuilder is not able to make them move in their full rotation range, largely exceeding 180.
The full ezbuilder 0-180 range produces a rotation of about 163. And , of course, no corrispondence between the degrees set and the actual servo position.
I was told by DJ Sures, that ezbuilder was made for ezb servos, and compatibility is not guaranteed with hitec servos.
I should suggest EZ to make a software update to ezbuilder to let users configure it to their own servos. I think it shouldn't be a difficult task.
It woulde be useful to many users !


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PRO
USA
#1  
In my humble opinion is not an ARC issue (a new software configuration option) it's a Firmware issue.

The EZB controller has 2 micro-controllers, one is used for the WIFI and the other one manages the hardware ports & speaker.

Both micro-controllers do not support over the air updates, the only solution is to use 3 party tools.

Unless there is an EZR firmware builtin functionality (not advertised until now) to specify the min and/or max servo pulses, i don't see that happening.

currently we are able to flash the WIFI micro-controller :), nothing is impossible but is not so simple.

Let's wait for DJ's answer.
#2  
You're right, the limitation must be in the firmware. We can only ask EZ and wait for a future ezbv5 !....
DJ made me see an oscilloscope skecth, showing the pulse range of ezbv3, that was wider than ezbv4 I have. They changed, mantaining compatibility with EZ servos, but not with hitec's.
PRO
Synthiam
#3  
Unfortunately there will not be changed to ARC to support third party hitec servos. If you wish to use incompatible third party servos, consider adding an arduino or ssc-32 to the ezb as a secondary controller.
PRO
USA
#5  
Yes, the servo stretcher from Servocity is your best bet for Hitec servos.
#6  
I burned up 2 ezrobot mini servos using the ssc-32 by sending 2500us pulse (maximum) to those servos... These servos were possibly pinned against their stops which would of course cause them to burn... After that I restricted my mins to ~600us and max to ~2400us just to be sure to protect from future burned servos....

I have no idea how @DJ set his servo mins and max for ARC and/or firmware, but if it were me doing this I would hard code for a buffer at each extreme to help protect servos from accidently hitting their stops...
#7  
Richard, there are, in ezb script, statements to prevent servos reaching their stops.
Yes, I might use servo stretchers or other controllers.
EZB has greatly reduced my hardware .It does everything !
Unfortunately I'll have to increase my hardware again.
PRO
Synthiam
#8  
I'm sorry to hear that you have to increase hardware again. however, the ezb firmware is hard coded for the servo max/min positions and cannot be altered. While this may not provide full servo range with your application, it assists tens of thousands of other users by providing pre-calibrated ezrobot servos for their revolution robots, specially in schools and educational facilities.

Adding the ssc-32 is only 2 wires - and will free up many digital ports on the ezb for other features... Such as leds or switches , etc
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