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C&P12 Placement Head Travel Profile - Pickup Z-Axis Up S tudent Guide SIPLACE D4 (FSE) C&P12 Placement Head EN 09/2006 212 9.3.2.3 Benefit s of the Special Mode "Sl ow Speed Upwa rds" and "Creep S …

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C&P12 Placement Head
Z-Axis Up Travel Profile - Pickup
Student Guide SIPLACE D4 (FSE)
EN 09/2006 C&P12 Placement Head
211
9.3.2.2 Special Mode Pickup with "Reduced Speed" Z-axis Upwards
If the reduced Z-axis speed is set to 98.1 % for the nozzle, the SR/MC 40X/501/502 SW will position as
follows in this special mode. from LRU/LRL 503 and SIPLACE Pro 1.4/2.0, this can be separately
selected in the CD programming of stations with SW version SR/MC 503 or higher.
LB down switches:
End position signal for positioning Z-axis
down; Both actions completed? (switched to
vacuum and end position signal Z-axis)
Start signal for upwards movement
Z-axis starts:
Positioning of Z-axis upwards
Special procedure: with low starting speed for
the first mm (takes approx. 20 ms longer) so
that the vacuum in the nozzle has time to
develop completely. After this, the speed
depends on the selected reduced value.
LB up:
Reset the LB down signal
1. vacuum query "CO picked up?"
Start signal for gantry axes
Communication with the CO table: all feeders
(in this special mode): "Close feeder flap" and
feeder lift
Z-axis end position signal (Z-axis at 0 position, DP
station swiveled out):
2. vacuum query "CO picked up?"
Start signal for star axis
C&P12 Placement Head
Travel Profile - Pickup Z-Axis Up
Student Guide SIPLACE D4 (FSE)
C&P12 Placement Head EN 09/2006
212
9.3.2.3 Benefits of the Special Mode "Slow Speed Upwards" and "Creep Speed Standard"
The function change "slow speed" (reduced speed SR/MC 407) offers the following benefits:
Increases the pickup reliability for all nozzle types and for heavy/exotic COs. During the slow start,
the vacuum has the chance to develop its full holding force. An exotic CO and /or a heavy CO will
therefore remain safely on the nozzle!
There is no danger of head contamination for nozzle types with large openings.
However, this option makes the pickup procedure around 20 ms longer than the standard pickup
procedure.
Irrespective of the special modes, the acceleration values in the nozzle handling from SW version
503 onwards can be reduced further if required.
You can also specify the Z-axis down waiting period if you are using special feeder constructions.
The current Siemens feeders do not need this option.
ATTENTION:
The mode "creep speed standard" does not usually provide any additional
benefits (except in the case of pickup from surftape) but does reduce the
placement performance considerably.
C&P12 Placement Head
Z-Axis Down Travel Profiles - Placement
Student Guide SIPLACE D4 (FSE)
EN 09/2006 C&P12 Placement Head
213
9.4 Travel Profiles - Placement
9.4.1 Z-Axis Down
9.4.1.1 Standard Mode - Placement: Z-Axis Down
The placement force is roughly 2.4 N in this
operating mode, with light barrier down on the
C&P12.
End position signal for X/Y and star axes:
All 3 end position signals available
Perform vacuum test "before placement". This
determines whether the CO is at the nozzle.
Z-axis starts:
Positioning of Z-axis downwards
LB up switches:
Electromagnetic valve for air kiss ON
Release signal for function LB down
LB down switches:
End position signal for positioning Z-axis
down;
And valve adjusting drive pickup/placement
position ON for air kiss