# OCR Design and Technology A2

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Thread starter 16 years ago
#1
Any one here do this?
any revion placese to go to just went through a past paper and it's hard!
"work out the load in kgs from : The vacuum cups have a diameter of 25mm and operate at a a vacuum level of 600 millibar use formula :
L=V X A / (98100) Where
L = load(kg) V= vacuum(millibar) A = cup area (mm2)"
0
16 years ago
#2
So you have a formula that says

Load = Vacuum x Area

-------------------

98100

Well assuming the cups are have circular bases:

Area = Pi x Radius^2

Radius = 1/2 x Diameter

Giving Area = Pi x 12.5^2 = 490.8738521 mm^2

So Load = Vacuum x Area / 98100

= 600 * 490.8738521

---------------------------

98100

= 294524.3113 / 98100

= 3.002286557

Hope thats right.

Andy
0
16 years ago
#3
product design ?
0
Thread starter 16 years ago
#4
correct,
systems and control!, getting scared lots of hard thing to do
0
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