44 EZMotion User/Programming Guide
www.controltechniques.com Revision: A8
As an alternative, the cam is initiated in the same manor as jogs, home and indexes.
Figure 56: Camming View
6.6 Motion Timebase (Realtime vs. Synchronized)
The Timebase for a profile determines what parameter is used as the denominator for velocity and acceleration units. The default
Timebase for all motion types (other than gear) is Realtime.
A Timebase of Realtime specifies that the denominator for velocity and acceleration units are units of actual time: Minutes, Seconds,
or Milliseconds (defined on the User Units View). Therefore, units of velocity for a realtime profile are as follows:
Follower Distance Units / Velocity Timescale.
And units of acceleration for a realtime move are
Foll Distance Units / Velocity Timescale / Accel Timescale.
A few examples of these units are as listed below.
Realtime
Based on these units, we see that velocity and acceleration of the motor are dependent upon actual time (minutes or seconds).
Selecting a Timebase of Synchronized means that all units of velocity and acceleration are a function of Master Distance rather than
time. Therefore, the motor velocity acceleration and position are all functions of the position and velocity of the master axis. The
units for velocity of a Synchronized move are as follows:
Follower Distance Units / Master Distance Unit
Therefore, the user specifies the number of follower distance units that the motor will travel per Master Distance
Unit. If the distance units for master and follower are the same, then the user in effect specifies a ratio for the velocity.
The acceleration units for a synchronized move are again a function of Master Distance. Acceleration and Deceleration units are as
follows:
Follower Distance Units / Master Distance Unit / Master Distance Unit
A few examples of Synchronized motion units are listed in the following table.
Follower Distance Units Master Distance Units Vel. Timescale Accel Timescale Velocity Units Accel/Decel Units
Inches N/A Sec Sec Inches/Sec Inches/Sec/Sec
Revs N/A Min Sec Rev/Min Rev/Min/Sec
Degrees N/A Sec msec Degrees/Sec Degrees/sec/msec
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