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MY3A - SMC

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Series <strong>MY3A</strong>/3B<br />

Model Selection<br />

The following are steps for selecting the MY3 series which is best suited to your application.<br />

Calculation of Guide Load Factor<br />

1 Operating Conditions<br />

Cylinder •••••••••••••••••••••••••••••••••••••• <strong>MY3A</strong>25-500<br />

Average operating speed υa •••••••••• 300 mm/s<br />

Mounting direction ••••••••••••••••••••••• Horizontal mounting<br />

Cushion •••••••••••••••••••••••••••••••••••••• Rubber bumper (δ = 4/100)<br />

W: Work piece (0.8 kg)<br />

Mounting Direction<br />

1. Horizontal z 2. Wall<br />

mounting<br />

mounting<br />

Page 948<br />

x<br />

y<br />

x<br />

y<br />

z<br />

3. Ceiling<br />

mounting<br />

Page 998<br />

x<br />

z<br />

y<br />

4. Vertical<br />

mounting<br />

Page 1042<br />

z<br />

x<br />

y<br />

2 Load Blocking<br />

<strong>MY3A</strong>25-500<br />

Refer to the pages mentioned above for actual examples of calculation for each orientation.<br />

Y<br />

Work Piece Mass and Center of Gravity<br />

Z<br />

5<br />

X<br />

Work piece<br />

no.<br />

W<br />

Mass<br />

(m)<br />

0.8 kg<br />

X-axis<br />

5 mm<br />

Center of gravity<br />

Y-axis<br />

10 mm<br />

Z-axis<br />

20 mm<br />

20<br />

Y<br />

10<br />

3 Calculation of Load Factor for Static Load<br />

m1: Mass<br />

m1 max (from q of graph <strong>MY3A</strong> ⁄ m1) = 10.7 (kg) • ••••••••••••••••••••••••••••••••••••••••<br />

m1<br />

Load factor 1 = m1 ⁄ m1 max = 0.8 ⁄ 10.7 = 0.08<br />

M1: Moment<br />

X<br />

M1 max (from w of graph <strong>MY3A</strong> ⁄ M1) = 4 (Nm) ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••<br />

m1<br />

M1 = m1 x g x X = 0.8 x 9.8 × 5 x 10 -3 = 0.04 (Nm)<br />

Load factor 2 = M1 ⁄ M1 max = 0.04 ⁄ 4 = 0.01<br />

M1<br />

M2: Moment<br />

Y<br />

M2 max (from e of graph <strong>MY3A</strong> ⁄ M2) = 0.8 (Nm) ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••<br />

M3 = m1 x g x Y = 0.8 x 9.8 x 10 x 10 -3 = 0.08 (Nm)<br />

m1<br />

Load factor 3 = M2 ⁄ M2 max = 0.08 ⁄ 0.8 = 0.1<br />

M2<br />

1130

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