Hofmann EasyBalancer EB 3500 - 9.3 Calculating unbalance and centrifugal force

Glossary - Calculating unbalance and centrifugal force EasyBalancer EB 3500
9 - 4
9.3 Calculating unbalance and
centrifugal force
Examples:
Unbalance: U
U = M  e = 1000 g  0,002 mm = 2 gmm
U = m  r = 10 g  100 mm = 1000 gmm = 100 gcm
Centrifugal force: Fz
Angular velocity: 
 = 2  n / 60 = (2  3000 min
-1
) / (60 s min
-1
) = 314.16 s
-1
Fz = m  r  
2
= 0.01 kg  0.1 m  (314.16 s
-1
)
2
= 98.69 N
corresponds to the weight of a mass of 10.06 kg
 = 2  n / 60 = (2  6000
rpm) / (60 s/min) = 628.32 s
-1
Fz = m  r 
2
= 0.01 kg  0.1 m  (628.32 s
-1
)
2
= 394.79 N
corresponds to the weight of a mass of 40.24 kg
Mass of the rotor: M = 1000 g
Eccentricity of centre of grav-
ity:
e=
0.002
mm
Unbalanced mass m = 10 g
Radius: r = 100 mm
At speed: n = 3000 rpm
Radius: r = 100 mm = 0.1 m
Unbalanced mass m = 10 g = 0.01 kg
At speed: n = 6000 rpm
Radius: r = 100 mm = 0.1 m
Unbalanced mass m = 10 g = 0.01 kg