Epsilon EP-P Drive Reference Manual
149
Revision A4
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Cam Table In Motion
Cam.#.CamTableInMotion
This parameter is active (on) when the specified cam table is executing. Note this source may be on even when no physical
motor motion is occurring. For example the master may not be moving, but the follower is still considered to be in a
Commanding Motion state.
Cam Table Size
Cam.#.CamTableSize
This parameter is the number of elements entered in the specified cam table.
Writable Check Box
Cam.#.CamTableWritable
Moves the cam table into ram memory so the user can change the cam table values using a program.
Cam Type
Cam.#.CamType
Cam types to choose from are; Master Follower, Absolute MFI, Incremental MFI, Cubic Spline, or Time Based Index. 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.
Decel
Cam.#.Decel
This parameter is the maximum deceleration for the Timed Index. The timed index will not decelerate faster than this value.
Distance
Cam.#.Dist
This parameter is the incremental distance the timed index will move.
Final Velocity
Cam.#.FinalVelocity
The cam table profile will exit at this velocity. See Initial Velocity for more information. When using a single cam table, with no
chaining, simply set the Initial Velocity to zero.
Forward Chain
Cam.#.ForwardChain
This parameter holds the next cam table to initiate when this cam table is completed. If no cam table is to be initiated, this
parameter should be set to -1 (negative one) to stop the cam at the end of the current table. The cam will then conclude
execution.
Forward chain and Backward chain can be dynamically changed by a user program. For example, a program monitors the
cam motion flow and alters the forward and backward chain variables to switch the flow. You can have a start up sequence of
tables, a running sequence of tables, a shut down sequence of tables and a alternate operation sequence of tables. The
monitoring program adjusts the chains to dynamically change the cam sequence.
The cam tables themselves can be altered on the fly as long as you are altering the non-executing cam table. Each cam point
is accessible by the user program provided the Writable check box has been selected.
Index Time
Cam.#.IndexTime
The Timed Base Index will slow down the index velocity so the index will run for this parameter value. The acceleration and
deceleration will be reduced to meet the distance and index time of this timed base index.
Initial Velocity
Cam.#.InitialVelocity
This is the entry point velocity for the cam table. For Master Follower this is a calculated value. The user should take care in
matching the velocity transitions when chaining one cam profile into another.
For MFI and Spline cam tables: If the first segment interpolation type is Linear, the initial velocity is the calculated velocity of
the first segment. When using a single cam table, with no chaining, simply set the Initial Velocity to zero.
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