Danfoss MCO 305 Design Manual page 73

MCO 305 Design Guide
__ PC Software Interface __
How to Insert or Delete Fix Points in the Table
Fix Points can be added by clicking the "Add"
button in the Fix Points table. This will display the
dialog for adding points. Points must be specified
as pairs of master and slave values and multiple
pairs can be defined at the same time. The Fix
points can be entered in any order; they will be
automatically ordered as they are being added to
the curve.
Note that if Snap on Grid has been activated, then
the master values will be snapped onto the inter-
polation grid as they are being added.
Fix points can be deleted by clicking on desired
point in the Fix Points table to select it. Then press
the [Del] key.
Fix points can be modified by double clicking on the
desired point in the Fix Points table. This will
display the dialog for modifying points.
Type: Curve and Tangent Points
The curve will be calculated as spline interpolation between curve points. For sectors where the velocity
must be constant and the acceleration = 0, you should use the tangent points. A straight line instead of a
spline will be placed between these points.
The CAM-Editor will always try to make a smooth transition from one sector to the next. For this reason, at
least one curve point is required between adjacent tangent sectors. This allows the CAM-Editor to generate
a spline between the two tangents. Hence, tangent points will always only come in pairs.
To change a sector from a curve to a tangent, simply double click on the "Type" column in the Fix Points
table of the second Fix point of the tangent. This point and the previous point will then be changed to
tangent points. To change a tangent sector back to a curve, double click on the "Type" column of either of
the two tangent Fix points.
You can execute the same action in the diagram: Move the cursor to the point until the hand icon appears.
Click on the right mouse button and select Change Type. Here, both points are changed immediately, too.
Using Start Stop Points
Start Stop Points are used to define point pairs for engaging and disengaging the slave during the syn-
chronization. You need one point pair to determine the master position where the synchronization should
start and where the engaging should take place. You can determine with an additional point pair from what
point the disengaging should be made and where the synchronization should be stopped.
You can define several point pairs (a maximum of 25), for example for multiple starts and stops in a cycle in
order to take account of different situations during the start. With the commands SYNCCSTART pnum and
SYNCCSTOP pnum slavepos, you can determine in your program which point pair is to be used.
If the Start and Stop points are identical, the slave will be engaged with the set maximum velocity, i.e.
without curve, as soon as the master has reached this point.
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