January 2012 6.16 The Control Loop 827
Use MP_minCornerFeed to define the minimum feed rate at block transitions
(corners and line-to-arc transitions). The parameter is intended for
technological purposes, in particular for preventing dwell marks in corners. If
the values are too large, feed-rate optimization becomes ineffective. This
might lead to excessive dynamic load on the machine.
If a value greater than MP_minPathFeed is defined in MP_minCornerFeed,
the value from MP_minPathFeed is used as the minimum feed rate at block
transitions.
MP_minCornerFeed
Minimum feed rate at corners
Available from NCK software version: 597 110-01.
Format: Numerical value
Input: 0.000 000 000 to 600 000 [mm/min]
Default: 30 [mm/min]
Access: LEVEL3
Reaction: RUN
MP_pathTolerance limits the feed rate at corners and curvatures. The
parameter defines the radius of rounding of corners and the maximum
deviation from the circle radius. This keeps the errors of nominal position value
filter within certain limits. The MANUALplus 620 decreases the feed rate at
corners, circles and curved paths in order to maintain the specified tolerance.
MP_pathTolerance includes errors caused by the filter before the position
control loop. The feed-rate override does not affect which jerk or tolerance is
in effect.
The tolerance defined in MP_pathToleranceHi is effective for feed rates
exceeding those defined in MP_maxG1Feed.
MP_minCornerFeed is always limited to the programmed feed rate
between two segments; this means that look-ahead violates the defined
minimum feed-rate value only if a lower value is programmed in the NC
block or is set by the override potentiometer.
To Next Page
Loading...
