Day 12 - Begin Glue-up
Today is straightforward: you need to start gluing your hydraulic arm pieces together to get some structural rigidity. Before you attach any of your syringes, however, you need to fill them with water and bleed out as much air as you can (air compresses, which will then reduce the overall distance your hydraulic system will be able to move). Remember that when you fill a syringe system, the tube and one of the syringes must be filled with water; the other syringe should be fully plunged in. Once you put one of them together you will see what I mean.
By the end of the bell you should have a working hydraulic arm. Tomorrow I wll expect you to build the claw attachment (or whatever mechanism you are using to grab the cups), so do not slack on today's assembly work.
Hydraulic calculations
- calculate the area of a circle (Acircle = πr2).
- calcuate the mechanical advantage of a system (M.A. = Fout/Fin)
- know that in general, output distance traveled must be multiplied by M.A. of the system to know input distance traveled
- calculate the volume of a cylinder (Vcylinder = πr2h)
- calculate the radius of a circle given its diameter (r = d/2, or d = 2r)
- know that in general, M.A. = Fout/Fin = Aout/Ain = Δhin/Δhout
- hydraulics
- the branch of engineering concerned with the conveyance of liquids through pipes and channels, especially as a source of mechanical force or control.
