by motiondave » Thu 10. Jan 2013, 14:06
You would need SCN6 actuators, i think they are rates at about 20-40 kg each, but EXPENSIVE!
If you are keen on a 4 DOF, consider 12v boat winches on each corner, sure they are noisy, but they should lift 100kg each easy. Considering they are rated to 900 kg each.
I use a converted brick actuator, but at $2000 each replacement, no thanks. They move 50 kg each easy.
the cheapest alternative I have found do far for these is $650 less motors.
Big worm gears may do it, but it hasnt been tested yet on a 4 DOF, however a spring underneath to help support the frame would overcome this.
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