Lenze Cam Designer Professional getting started Manual de usuario descargar pdf (Pagina 72)

Cam Designer Professional

70 Cam Designer Professional DE/EN 2.0

6 Laws of motion and mathematical

background

6.1 Specification of movement

According to VDI document 2143 “Laws of Motion fo r Cam Profiles”, movement can be specified as

follows:

Type of movement Abbreviation Velocity Acceleration Graphical

representation

Stop R v=0 a=0 Line

Constant velocity G v ≠ 0 a=0 Line

Turning point U v=0 a ≠ 0 Point

Movement B v ≠ 0 a ≠ 0 Point

These four motion types can be used to specify the

physical parameters for all practical motion problems.

The selected boundary values are required to calculate

the connecting profile sections between t he defined

segments:

• Since the acceleration f or motion types R and G = 0,

they can be graphically represented as a line. In t his

case, the boundary values on the left and on the right

end of the line are identical.

• Fo

motion t

esUandBtheaccele

ation ≠ 0. These

•

≠

two elements can be graphically represented as a

point.

After specifying the basic elements for the required

motion and selecting the required boundary values, the

interconnecting curves can be calculated according to

the laws of motion. Depending on the selected

connection t ype, it is possible to achieve jerk and

jolt-free motion profiles.

Tip!

Only specify motion parameters which are absolutely necessar y to solve the problem! The higher the

degree of freedom for Cam Designer in automatic generation of connections, the smoother the motion

profile.

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Lenze Cam Designer Professional getting started Manual de usuario Pagina 72