Aerotech UNIDEX 600 Series, Руководство пользователя

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U600 User’s Guide Parameters
Version 1.4
Aerotech, Inc.
C-53
C.3.23. MaxFeedRateIPM
This machine parameter specifies the maximum speed allowed for this axis if it is defined
as a linear Type axis. If the absolute value of the directed speed of the axis exceeds this
value, during contoured, G0, asynchronous or spindle motion, feedrate limiting will
occur, such that, the controller will decrease the speed so that the axis will move at its
maximum speed defined by this parameter. Contoured moves involving multiple axes will
have their vector speed decreased until no axes in the move violates its maximum
feedrate. If a contoured move has its speed decreased for this reason, the UNIDEX 600
MMI, will change the color of the actual feedrate displayed to yellow.
This value must be set in inches per minute, even if the programmer intends to program in
millimeters. If this parameter is set to zero, there is no maximum feedrate for this axis.
This parameter does not limit the speed of any camming motion. If you change this
parameter while a move is in progress, it will not take effect until the move is complete.
The MaxFeedRateIPM parameter will scale down the feedrate, when an axis speed limit
is exceeded. However in some cases, the user may desire to generate a fault when the
speed is violated, rather than scale down the feedrate. To do this, set this parameter to
zero, and set the VELCMDTRAP axis parameter.
A drawback of the MaxFeedRateIPM machine parameter, is the limiting will take place
even if the axis never reaches the commanded speed (never accelerates to full speed). So
for short moves or paths, this parameter can limit the feedrate excessively. In these cases,
when a speed limit is still required, use the VELCMDTRAP axis parameter instead.
This parameter, and the MaxFeedRateIPM parameter can be limited to a lower value than
expected, due to the fact that the velocity value stored internally, in machine counts, is
only 16 bits. Therefore an upper limit to this parameter is:
(65,536,000 * 60) / (CntsPerInch)
C.3.24. MaxFeedRateRPM
This machine parameter specifies the maximum speed allowed for this axis if it is defined
as a rotary Type axis. This parameter is in user units of revolutions per minute. See
MaxFeedRateIPM for linear axes and more details, as it relates to this parameter.
This parameter, and the MaxFeedRateRPM parameter can be limited to a lower value
than expected, due to the fact that the velocity value stored internally, in machine counts,
is only 16 bits. Therefore an upper limit to this parameter is:
(65,536,000) / (CntsPerDeg * 6)
C.3.25. NumDecimalsEnglish
This parameter allows the user to define the position display when the G70 English mode
is active. This is the total number of digits displayed after the decimal point.
C.3.26. NumDecimalsMetric
This parameter allows the user to define the position display when the G71 Metric mode
is active. This is the total number of digits displayed after the decimal point.