Lenze EVS93xx CrossCutter - Manual (Page 86)

Cross Cutter
Features of the "Cross Cutter" prepared solution
 Prepared Solution Servo PLC / ECSxA 1.1 EN 2-72
2.5.11 Manual X trimming
Manual X trimming allows the machine operator to shift the cutting position in a positive or
negative direction. This is usually carried out during machine setting-up operation. The machine
operator can move the cutting position by pressing two pushbuttons until the required format is
reached (see Figure27). Two bits are available to the user for this operation in the application
status word. For trimming in a positive direction, bit 19 in application control code C4135/000
needs to be activated (g_bXAxisTrimmingPosDirection global variable = TRUE). For trimming in
a negative direction, bit 20 in application control code C4135/000 needs to be activated
(g_bXAxisTrimmingNegDirection
global variable = TRUE). Code C3678/000
(g_nXAxisTrimmingFactor_v global variable) contains the inching speed value for trimming in a
positive and negative direction. The acceleration ramp and the deceleration ramp for inching are
specified in codes C3676/000 and C3677/000. Where long cutting lengths are concerned, we
recommend performing X trimming by entering a value directly. Users can enter an absolute
target position in code C3674/000 (g_dnSetXAxisTrimmingTPPos global variable). To enable
the absolute positioning bit 25 in application control code C4135/000 needs to be activated
(g_bLoadSetXAxisTrimmingTPPos global variable = TRUE). As soon as the value in the code
changes, the new position will be approached. With Code C3671/000
(g_dnXAxisTrimmingTPPosOut global variable) the user can see the actual trimming position.
The speed and ramp times for this positioning operation are set in codes C3673/1-2 and
C3672/2-3 respectively. To work with manual X trimming, operation usually has to be activated
via bit 18 in application control code C4135/000 ( g_bUseXPositionTrimming global variable =
TRUE). When X trimming is activated, the value calculated for the distance between the mark
sensor and the cam zero position is replaced by a value generated by X trimming. This means
that X trimming can even be performed when mark correction is active. X trimming is only
permitted in cutting operation.
Figure27: Representation of manual X trimming
Manual X trimming enables the user
to make the cut at the right position.