Servo Limits, lets consolidate them

Help & Support Robot Parts
1

I finally got my first 4 CS160s in today. No sooner was it out of the pack then it was doing servo jumping jacks (hit the extents as far as it can back and forth relentlessly) with my other types of servos.

Well, on the Basic Atom Pro, here are the limits I am finding on servos (using HSERVO 8.0.1.7):
Futaba S3004: Responds to commands all the way from 12,000 to -12,000
Futaba S3151 Digital: Responds from 11,000 to -11,000
Hobbico CS160 Digital: Responds from 11,850 to -11,850*

None of those three servos did a full 180 rotation.

*: Curious note about the Hobbico. It interprets the directions opposite what the Futabas do. I wonder if thats a Hitec versus Futaba battle?

2

The hitec servo has a CW rotation with a longer pulse length, where the Futaba is the opposite. It’s been that way from day one.

The actual pulses you are sending to the servos are:

(12000 * 0.0625) + 1500 = 2250uS
(-12000 * 0.0625) + 1500 = 750uS

That’s a pretty good range, but you may need to expand it a bit to get the full 180° from the analog servos. The CS150 is a Hitec servo, but it’s not able to do 180° nor is it able to be programmed to do so with the Hitec programmer.