| Gallery, Projects and General > How do I?? |
| Electric motor question |
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| David Jupp:
If using wire rope, perhaps consider some kind of safety device in case of rope failure (maybe similar to that in 4 post car lifts). A hydraulic arrangement tends to 'fail slowly' but might still warrant some additional measures. Linear actuators might need a brake to ensure they 'stay put' on power failure. |
| vtsteam:
Fascinating fun! Any use for a counterweight on a pulley to ease the load some on whatever method you choose? |
| appletree:
If its a single acting ram only the rod needs to be smooth/acurate, with a suitable seal in the bore of the gland. The tone just acts as a guide the force is X psi times the cross sectional area of the shaft. Phil |
| RussellT:
For simplicity I'd go for a wire at each corner. It'd be easy to adjust the length with a rigging screw or eyebolt. You could also incorporate counterweights to take the static load. I'd then connect all 4 wires to your chosen actuator so they were always moving together. If you want greater travel than your actuator gives then you could use a pulley to double the travel if the actuator is powerful enough. I think I've seen drawings for similar devices for hoisting model railways up to the ceiling. Russell |
| PK:
Since no one has mentioned it... Wire or chain on each leg, going to a plate which is pulled or pushed by a linear actuator ? You could use a winch too with 4 drums on the same shaft. Both options self synchronise... |
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