Delta RMC101 User Manual Page 139

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Curve Tool 3.9
Using RMCWin 3-89
Time (Master Units)
By default this quantity is labeled Time (sms) and refers to actual time in short milliseconds
(sms). A short millisecond is 1/1024th of a second. This term is used because, when the RMC
follows a curve based on time, it processes one time unit every 976 microseconds, or 1024 time
units per second. However, in many applications this quantity actually refers to a master position.
Therefore, this label can be changed. For example, a general label that fits most geared curve
applications would be Master Pos (pu). For details on changing this label, see Curve Axis
Labels.
Position (Slave Units)
By default this quantity is labeled Position (pu) and refers to position units of the axis following
the spline. In applications in which the curve is being followed with respect to another axis, it may
be useful to change the label to help differentiate it from the axis it is geared to. Therefore, this
label can be changed. For example, a general label that fits most geared curve applications
would be Slave Pos (pu). For details on changing this label, see Curve Axis Labels.
The units for this field will always be position units, as defined for the axis from the main RMCWin
screen and used throughout the RMC product.
Velocity
This quantity appears on the velocity scale bar, in the Detail window, in the data tips, in the Point
Properties dialog box, and in the Options dialog box under the General tab for setting the speed
limit. The label for this quantity cannot be changed.
The speed units are position units per 1024 time units. Therefore, if a curve is followed with
respect to time, each time unit is 1/1024th of a second, so the speed units are position units per
second.
If the curve is followed with respect to another axis, then the speed units are less clear: the speed
will be slave position units per 1024 master position units. For example, a 1:1 gear ratio would
have a speed of 1024.
Acceleration
This quantity appears on the acceleration scale bar, in the Detail window, in the data tips, in the
Point Properties dialog box, and in the Options dialog box under the General tab for setting the
acceleration limit. The label for this quantity cannot be changed.
The acceleration units are position units per 1024 time units per 1024 time units. Therefore, if a
curve is followed with respect to time, each time unit is 1/1024th of a second, so the acceleration
units are position units per second per second.
If the curve is followed with respect to another axis, then the acceleration units are less clear: the
acceleration will be slave position units per 1024 master position units per 1024 master position
units.
See Also: Curve Tool Topics
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