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I'm building some ghouls in the style of Pumpkinrot's Tin Man shown in the image below and I'm trying to devise a way to animate the arms to create a swinging motion.
The plan is to have a pick in the ghoul's hand digging a grave.
I want the arms to raise slowly or at a normal speed but then fall forward under their own weight so the pick strikes, or appears to strike, the ground.
Though this could be done with a cam/follower mechanism but I'd like to keep the mechanics within the upper torso if at all possible.
Next I thought of some sort of linkage with an actuator on a wiper motor that pulls the linkage attached to the shoulder downwards thus pulling the arms up. Once the rotor spins past a point it releases the linkage and drops the arms to the starting point.
Needs to be continuously running, electric, no pneumatics.
Seems like this would be the most compact and doable with a wiper motor.
Any ideas would be appreciated.
Creature reference courtesy Pumpkinrot...
The plan is to have a pick in the ghoul's hand digging a grave.
I want the arms to raise slowly or at a normal speed but then fall forward under their own weight so the pick strikes, or appears to strike, the ground.
Though this could be done with a cam/follower mechanism but I'd like to keep the mechanics within the upper torso if at all possible.
Next I thought of some sort of linkage with an actuator on a wiper motor that pulls the linkage attached to the shoulder downwards thus pulling the arms up. Once the rotor spins past a point it releases the linkage and drops the arms to the starting point.
Needs to be continuously running, electric, no pneumatics.
Seems like this would be the most compact and doable with a wiper motor.

Any ideas would be appreciated.
Creature reference courtesy Pumpkinrot...
