Danfoss VLT Series Programming Manual page 53

Servo Drive Operation
blend
Master
dist
relative
0 1
Change CAM imm=1
Use blend dist=1
Active
CAM 2 CAM 3
CAM
InSync
End of
pro le
Illustration 2.70 Change CAM immediately = 1.
Use blending distance; Blending distance ends after the end
point of the new CAM.
Master relative
Slave absolute
Non- cyclic
Master
blend
relative
dist
0 1
Change CAM imm=1
Use blend dist=1
Active
CAM 2
CAM
InSync
End of
pro le
CAM
Error
Illustration 2.71 The end of the blend distance is not on the
new CAM.
The transition is rejected and the servo drive acts as if the
command was never issued.
MG36D102
Programming Guide
Master relative
Slave absolute
Cyclic
Blending
2
Guide value
cycle
2
Guide value
cycle
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Blending
Master blend dist
relative
0 1
Change CAM imm=1
Use blend dist=1
Active
CAM 2 CAM 3
CAM
InSync
End of
pro le
Illustration 2.72 Change CAM immediately = 1.
Use blending distance; Blending distance is shorter than the
new CAM profile.
Relative master position, relative slave position
The processing starts as soon as the CAM profile is
st
activated. The 1 point of the CAM profile is moved to the
current position and guide value. The behavior when
switching to non-cyclic CAM profiles is the same as shown
in section Relative master position, absolute slave position in
chapter 2.4.5.4 Basic CAM. Option slave absolute or slave
relative has no influence in these cases and is therefore not
mentioned again in this chapter.
Master relative
Jump in
velocity possible!
0 1
Change CAM imm=0
Use blend dist=0
Active
CAM 2 CAM 3
CAM
InSync
End of
pro le
Illustration 2.73 CAM profile with relative master and relative
slave positioning.
A jump in velocity may occur if the CAMs do not match.
Master relative
Slave absolute
Guide value
cycle
Master relative
Slave relative
2
Guide value
cycle
51
2 2