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This pages future name..."Building an affordable model using servos". That doesn't cost an arm and leg to
build.
New Plans for Excavator: I have recently dicovered modifing servos to either 180 degrees or continuious rotation. I had
originaly planned to connect a reverseable ESC to just the motor contacts underneath the bottom of servo cover. I did test
that method but I wasn't sure if that was the cheapest way to control the model with Pulse Width Modulation. So
now all I need to do is run a extension from the sevo connector to the receiver. I tested It with the modified servos
and it runs perfect and I didn't even need to buy ESC's. I think i'm on my way to building a cheap r/c excavator finally.
This is my Cat 225. It stopped working a while back decided to bring it back to life. I took it apart and gutted the whole
thing. I tested all the motors and found just the stick motor was completely inoperable. So, I added servos for both the stick
and bucket. Now I'm waiting on electronic speed controls and a 6CH tansmitter to compelet the model. The boom and track motors
still worked so I left them alone. As for the swing motion, well it did not come with that action. So I mounted a servo in
the uddercarriage and connected the upper struture to the horn of the servo. I choose servos beacause I have a bunch extra
servos lying around and they are alot cheaper than ball screw actuators.
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