What happens if 7.2 volts is used on micro servos?
Which of the servos on the Lynx 6 arm are digital? and which are analog?
Does any one think the Lynx 6 can grip and move at least 4 pounds?
You trying to pick up your cat?
Honestly, I don’t know what would happen if you consistently ran 7.2 volts to the micro servos in the wrist wrotation and grip, but I suspect you’d either eventually be looking at a <foom!> situation, or they would quite readily strip out the gears if you overran the physical end-of-travel. (I admit, I’ve heard the “unhappy grinding noise” a couple of times before I properly adjusted the end-of-travel values in software - gotta be careful about that with the micros)
I run the positive leads to mine through a 5-volt regulator module (a 7805 and a couple of capacitors) that I had laying around, and they work quite happily that way. One could easily replace the 7805 with a 7806 to get that extra volt out of the system, but I’m not really subjecting my arm to the kind of loads where that makes any difference anyway.
As to the payload capacity, I’d think that four pounds is a bit out of the envelope for the Lynx 6.
Mostly they get jittery. I don’t think it’s fatal though.
The L5 and L6 are all analog servos.
No servo based arm will be able to move 4 lbs. The strongest servo based arm actually comes from the Servo Erector Set. I was able to move 13.7 ounces (full can of Coke) with the aluminum arm (although shorter tubes were used), but it is challanging. You will need to use digital servos and load balance the arm with springs. The work envelope will be restricted a bit though. There are also issues with duty cycle when heavily loading the servos. They can and do heat up when doing this, so you will have to limit how long the servos are working this hard.