Emerson EZMotion, User Manual

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EZMotion User/Programming Guide
www.controltechniques.com Revision: A8
Figure 145: Camming View
Cam Number
Use the arrows of the spin box to increment or decrement the Cam Number and view the setup information for that Cam number. A
maximum of 32 different cam tables can be created.
Name
The user can specify a cam name (Cam.#.Name) of up to 12 alphanumeric characters. This allows assigning a descriptive name to
each cam table indicating different machine operations.
Cam Type
Cam type (Cam.#.CamType) allow the user to choose from; Master Follower, Absolute MFI, Incremental MFI, Cubic Spline, or Time
Based Index cams. Most data entries are “Absolute” which means each point is an absolute distance from the start of the cam table
which is an implied zero, although the starting value does not have to be zero. The Incremental MFI (Master/Follower/Interpolation)
has the entries as distance deltas from point to point which means the point is relative to the previous point.
Master Follower
Master Follower is an Absolute Master Follower with a fixed interpolation type of Linear for each point. This is convenient when there
are many points entered or are importing data from a CAD system. A large number of data points are required for smooth motion.
Absolute MFI
Absolute MFI allows a different master, follower, and interpolation for each point in the cam. The values are in reference to the
beginning of the cam table (position zero). The master positions must increase from point to point since change in master position
must always be increasing.
The position interpolation types that are valid in this mode are:
Linear – Constant velocity across the complete point.
Square – Velocity increases or decreases linearly across the point. This means that the position changes quadratic across the
point.
S-curve - The velocity and position change along a sinusoidal shape across the point
Cosine – The velocity starts and ends at the same velocity, but increases or decreases along a sinusoidal shape in order that the
proper final position is achieved
Jerk Free – The jerk starts and ends at zero. Jerk increases or decreases in smooth transition.
Incremental MFI
Incremental MFI is different from Absolute MFI in that each point is a delta position. This allows values in the middle to be modified.