The specs seem to claim that they have a 1.6kg stall torque. They seem so small I'm very curious if they'll actually be able to get anything close to that. So I've devised an extremely primitive load test.
I taped together 50g worth of coins. 1 twonie, 2 loonies, 5 quarters, 1 nickel and 1 penny. I put them on the end of a 10cm boom arm. When the servo has the arm parallel to the ground it should be experiencing
t = 10 x 0.05 x sin(90) = 0.5 kg cm of torque.
Time to see how it holds up.
Edit:
PASSED! with flying colours! with the 0.5kg cm load it did not even blink. The servo rotated just as quickly as it did with no load at all. I'm impressed.
Quick note about the Dagu Servo... it's definitely much lower quality than the DFRobot one. I won't be ordering any more of them. Especially when they cost that much more.
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