Description of the Software Modules and Parameters
Parameter manual
b maXX
BM3000
Document no.: 5.12001.07
429
4
Cyclical curve offset
A curve offset is added to the output value of the cam. This offset is reset to 0 at the start
of processing (transmission from active to run). Each complete cam cycle increases the
curve offset by the cyclical curve offset in parameter
.
This results in the following behavior:
1. Cam cycle: Output = Original curve
2. Cam cycle: Output = Original curve + 1 * cyclical offset
3. Cam cycle: Output = Original curve + 2 * cyclical offset
and so on.
If an offset cam is used (inequality of starting and end point), this offset is imported in a
cam file by ProCam and is transmitted to the controller during download. If the generation
of the cyclical offset is selected in the settings of the cam generator
, then the
cam offset is loaded in parameter
at state transition of the cam generator from
init to active.
m
Time control with virtual master axis
Beginning with the greatest table index, the cam can be processed in processing mode
"Time control with virtual master axis" (reverse processing, if
is negative).
Now, the cyclical curve offset is subtracted from the total curve offset after processing
is started.
m
Parameter-controlled processing mode
The cyclical curve offset
is added to the total curve offset, if the table index
overflows. This means, that a jump is made from a great table index to a small table
index. The cam generator recognizes this as an index overflow. The total curve offset
is increased by the cyclical curve offset. If there is a jump from a small table index to a
great table index, then the total curve offset is reduced by the cyclical curve offset.
Example:
Count supporting points = 32
Action:
Jump from table index 25 to table index 7
Consequence:
The jump is detected as a positive overflow. This leads to an
increase of the total curve offset around the cyclical curve offset.
NOTE!
The jump of index 25 to index 7 is interpreted as a jump above table index 31 and not
as a jump within the cam of table index 25 above index 16 and after index 7. This is
the case, because the jump width is greater than or equal to half the count of the sup-
porting points. In this example the jump width (25 - 7) = 18 table indices is half of the
count of the supporting points (32 / 2) = 16 indices.