Delta DVP-15MC Series, Руководство по эксплуатации

Страница: 661 / 972

Chapter 11 Motion Control Instructions
11-191
11

Absolute mode
When the MasterAbsolute parameter is TRUE, the master axis position and its cam phase are in
the absolute relationship. At any time, the master axis cam phase is equal to the remainder got by
dividing the master axis position at that time by the maximum value of the master axis cam phase
in the cam relationship.
For example, the master axis is in absolute mode and the maximum value of the master axis in
the cam relationship is 360. So its cam phase is 100 as the master axis position is 100
(100=100%360); its cam phase is 140 (140=500%360) as the master axis position is 500 and so
on. The master axis position corresponds to its cam phase as shown in the figure below.
When the SlaveAbsolute parameter is TRUE, the slave axis position and its cam phase are in the
absolute relationship. At any time, the slave axis cam phase is equal to the remainder got by
dividing the slave axis position at that time by the maximum value of the slave axis cam phase in
the cam relationship. When the slave axis is in absolute mode, the corresponding relationship
between the slave axis position and its cam phase is consistent with that between the master axis
position and its cam phase when the master axis is in absolute mode.

Offset and Scaling
The cam relationship between the master axis and slave axis is preplanned. But as the cam motion is
executed, the position offset or scaling based on the preplanned cam relationship can be performed
through setting the
Offset and Scaling parameters. For example, there are various sizes for the same
product which is processed. Just one cam relationship need be planned and then changing the values
of
Offset and Scaling fits the processing of products of different sizes.
The MasterOffset parameter is valid only when the master axis is in absolute or relative mode.
( MasterAbsolute =TRUE or FALSE). The SlaveOffset parameter is valid only as the slave axis is in
absolute mode ( SlaveAbsolute =TRUE). The SlaveOffset parameter is invalid as the slave axis is in
relative mode ( SlaveAbsolute =FALSE).
The position offset and scaling of the master axis and slave axis determine the actually executed cam
relationship. The effect is described in the following example. The planned cam relationship is shown
as the figure below.
S
lave axis cam phase
Slav e ax is p osi ti on
0
100 - 260 - 620 460
360
Slav e ax is phas e
Mast er
axis phase
0
180 360
300
Plan ned C a m Cu rve
Cas e 1
S
lave axis cam ph as e
S
lave a xis position
0
260 - 100 - 460
360
S lave axis ph ase
M as te r
axis phas e
0
360
P lan n ed C am Cu rve
C ase 2
200
200
100
Master axis cam phase
M aster axis position
0
360 -360 -720 720
360