OK, I'm part of a team working to come up with and teach a basic robot class. Idea is to buy or create a "kit" to build a simple wheeled 'bot (I have a simple sheet-metal chassis made). Goal is to navigate table top without falling off, maybe follow walls in a MicroMouse maze.
I had GWS S03N 2BB Standard-torque Ball-bearing Servo motors on hand from some Mark III experiments:http://www.junun.org/MarkIII/Info.jsp?item=18
Simple to modify. Setting the pot to deadband at 1500 is not accurate. I have to take the R/C servo apart to adjust. I'm considering replacing pot with a pair of resistors.
I'm open to the 1425CR or other servos. would you say they're better? (Don't need CR mod?)
I was disappointed with the "matching" of the two servos on a little 'bot. Yes, I can create a pair of offsets for better dead-band, but what about the scaling? Does that need an adjustment as well? Goal is to get the pair to track reasonably close across a table top.
Maybe I can qualify them better with an encoder and light load selected. I saw a fixture somewhere...
Other thought is to just use the DC motors in the R/C servos, and drive them with PWM. BasicMicro Nano 18 chip (not much room!) running Basic.
I take it the 1425CR has the HiTec splined shafts?