The EZ-Robot EZB / Iotiny controllers PWM are compatible with EZ-Robot servos (1-180) and specific us range (not advertised) but I measured before and is specific for the EZ-Robot servos not the common 500-2500 us with middle point @ 1500us.

ARC's EZB' PWM protocol is limited to 180 degrees.

Two options:

1. Custom firmware (Arduino)
2. EZB + servo board.

I found this specs: https://nenovtechnic.eu/electronics/td-8135mg-waterproof-35kg-180-degree-large-torque-digital-coreless-servo.html

It's a 180 degrees using the standard range 500-1500-2500 us.

thanks PTP I guess I will look at arduino. I appreciate the help.

Hey DJ remember when we used to get points for answering questions and we could buy stuff.  How about points towards subscription fees

if you want to do a quick test:

Pick an arduino firmware and change the attach method: https://www.arduino.cc/reference/en/libraries/servo/attach/

.attach(... , 500, 2500)

Then send 1, 90, 180 to test the limits of your servo.

Those 270 degree winch style servos use the same pwm range, in my experience. The degree number and range of the hardware are not actually related. We ,arduino, etc just added an abstract value to the pwm range so it appears a standard servo has 180 degrees

I really like that you’re pushing the limits of what a robot can do. It’s tough with trying to find mechanical pieces that work together - wish there were more robust kits for this sort or thing. Made of light metal or even strong plastic. But mostly I think it’s the tradition servo that needs to be changed. We need some sort of diy joint building kit that reduces the strain on servos. So the torque doesn’t need to be as high with because if the high fulcrum.

So many robot companies have spent hundreds of millions of dollars and bankrupted. Meanwhile you’re sitting at home doing more than they ever did lol. It’s awesome

Thanks I am just having fun while locked up with covid and winter. I agree that hobby servos are a problem. I think the work Mickey and PTP are doing with FOC BLDC motors and Planetary drives will enable a lot more capabilities.  I am hoping the low cost off the shelf BLDC will be the game changer for robotics. The controllers will be commoditized and they should come down in price.

My fingers are crossed as well. It seems robotics is such a slow industry. It’s suffering from broken promises of past robot companies. Expectations were high but nothing useful or reliable was created. And of course the cost of full stack product development bankrupted everyone

I was hoping during covid that we’d see a bunch of useful robot products - also from this community. There’s a higher usage than normal of ARC but not many products in development.

I feel like it’s related to lack of hardware - and as you said, the cost is too high for what is available.

Maybe 2021 is the year? The media has been saying that for many years this is the  year of robots LOL. Okay I’ve done my part by making robots super easy to program, now someone has to take care of the hardware! Anyone?! LOL

Am trying ! A cost effective robot hardware platform , either assembled or in kit form, that can actually be useful in the home is something Ive wanted to do for sometime, like giving arms and legs to an Alexa. A basic off the shelf platform for "some" basic simple home maneuvers. Which of course would require a quick easy to do navigation setup for the home that the robot will reside in. Just getting it to take the trash bag to the trash can would be money maker alone I think. Carry grocery's, home sentry, some education and entertainment function, verbal companionship, would be some other great features, who knows... can buy your home robot from Sharper Image, Best Buy or Walmart in the future It just needs to be  simple design and do simple task, maybe add the ability for the robot owner to add on stuff over time. That's all I ask.