ShaunManners
New Member
Hi All,
I am working on a project and bought myself a couple of Hitec servos. I have now built an astable circuit using a 555 timer and controlling it with an input thats between 0 and 10v (10v makes the pulse 2ms and 0v makes it 1ms).
When I tested it, the servo arm didn't move the 180 degrees I was expecting (when no power applied I can move it 180) I had a look at the datasheet for the servo and it says it has an operating angle of "40? one side pulse traveling 400usec"
I am new to servos (as you can probably tell) and I was wondering, what does the "one side pulse" bit mean? I am uncertain as to whether it should travel only 40, or 80. yet while it doesn't travel the full 180 I was expecting, its certainly more than 80.
The other thing is that in the instructions is says a control pulse of between 0.9ms and 2.1ms, if my circuit is giving out 1-2ms do I need to tune it to make the servo move further or is it moving to its fullest extent already.
I appreciate you probably cant answer all of this, but any comments would be welcome!
Cheers
Shaun
I am working on a project and bought myself a couple of Hitec servos. I have now built an astable circuit using a 555 timer and controlling it with an input thats between 0 and 10v (10v makes the pulse 2ms and 0v makes it 1ms).
When I tested it, the servo arm didn't move the 180 degrees I was expecting (when no power applied I can move it 180) I had a look at the datasheet for the servo and it says it has an operating angle of "40? one side pulse traveling 400usec"
I am new to servos (as you can probably tell) and I was wondering, what does the "one side pulse" bit mean? I am uncertain as to whether it should travel only 40, or 80. yet while it doesn't travel the full 180 I was expecting, its certainly more than 80.
The other thing is that in the instructions is says a control pulse of between 0.9ms and 2.1ms, if my circuit is giving out 1-2ms do I need to tune it to make the servo move further or is it moving to its fullest extent already.
I appreciate you probably cant answer all of this, but any comments would be welcome!
Cheers
Shaun