I have an idea for a conveyor belt. Not sure if it works though, and my fortress is not far enough to build it yet... (Yeah, I'm new to this game. Can't build mechanisms yet).
Drawbridges toss items when closed right? So, put item on one end, trigger it, and the item will fly off. With a ceiling, and walls to the side, there is no where else to go except where you want it to be.
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?[-----II]P
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Where = is the walls, P is a pressure plate to trigger a fluid logic to get the bridge going up/down. I is the item to move (set as stockpile here?)
So, dwarf walks over the plate, causing the bridge to do down (might need to move the plate further to prevent atom smashing him). Sets the item on bridge, goes back for more and walks over the plate again, triggering the bridge to fling the item. (I'm not too sure of the fluid logic involved, but I think
http://dwarffortresswiki.net/index.php/Pressure_plate#Permanent_Effect_Pressure_Plate_System works. And items can't be smashed on walls right?
Does this work? If it does, we can use this to quickly move items around the fortress. In my map, the sand area is very far away from the magma pipe, and I'd rather not reroute the magma so far...
I also wonder if it is possible to rig this for Z-levels also (elevator)? Keep tossing the item up 1 z-level. I think this might smash the item though, since it'll be on a tile with an up drawbridge which needs to come down for it to have somewhere to drop on.