D-serie LEVEL II.pdf - 第132页
C&P6/12 Placement Head Travel Profile - Pickup Z-Axis Down S tuden t Guide Advanced Level 2 SIPLACE D Series C&P6/12 Placement Head EN 05/2007 8-6 8.3.1.2 Special Mode "Cont actless Pickup" Z-Axis Down …
C&P6/12 Placement Head
Z-Axis Down Travel Profile - Pickup
Student Guide Advanced Level 2 SIPLACE D Series
EN 05/2007 C&P6/12 Placement Head
8-5
8.3 Travel Profile - Pickup
8.3.1 Z-Axis Down
8.3.1.1 Detailed Standard Pickup Procedure: Z-Axis Down
8-4: Star position 0°: detailed pickup procedure: Z-axis down
Start gantry axes to pickup position of next feeder
and communication with changeover table: Start
signal to gantry axes
Start signal X & Y axis to next feeder/this
opens the feeder flap
End position signal for X/Y and star axes:
End position signal for star axis
Enables vacuum query: "segment airtight?"
before pickup
X/Y end position signals available.
Z-axis starts:
Z-axis starts positioning downwards
Light barrier (LB) up switches:
Release signal for function LB down, (after a
waiting period of approx. 3.6 ms, depending
on the DIP switch, special function, currently
not active as a default)
LB down switches:
End position signal for positioning Z-axis down
and valve positioning drive ON for vacuum.
Legend
1. End position signal for Y-axis (position to
feeder pickup position)
2. End position signal for star axis
3. Uncommutated motor current for Z-axis
4. End position signal for Z-axis
Section 1: move down
Section 2: move up
8 ms after the end position signal for the Z-
axis, the system switches over to vacuum and
the Z-axis is restarted and moved upwards.
C&P6/12 Placement Head
Travel Profile - Pickup Z-Axis Down
Student Guide Advanced Level 2 SIPLACE D Series
C&P6/12 Placement Head EN 05/2007
8-6
8.3.1.2 Special Mode "Contactless Pickup" Z-Axis Down
Pickup procedure for "contactless pickup":
Start gantry axes to pickup position of feeder and communication with changeover table:
– Start signal to gantry axes
– Signal for next feeder / this opens the feeder flap
End position signal for X/Y and star axes:
– End position signal for star axis
– Enables vacuum query: "segment airtight?" before pickup
– X/Y end position signals available.
Z-axis starts with operating mode "positioning type - absolute" to saved nominal height:
– Positioning of Z-axis down
Light barrier (LB) up switches:
– Release for function LB down (although not needed))
Legend
1. End position signal for X-axis (position to
feeder pickup position)
2. End position signal for star axis
3. Uncommutated motor current for Z-axis
4. End position signal for Z-axis
Section 1: move down
Section 2: move up
In contrast to the previous diagram, a delay of
typically 2 ms occurs for early vacuum.
8-5: Special mode Z-axis down with "early vacuum ON in top position"
In the case of LRU/LRL 503 and SIPLACE Pro,
contactless pickup can only be programmed in the
CS for SR/MC 503 stations and higher.
When the component track, for which contactless
pickup has been programmed, is accessed for the
first time, the following is performed:
The Z-axis is taught the pickup height with
increased force. The Z-axis moves until it
mechanically stops.
This pickup height is then reduced by 1.13 mm
(602) to give the nominal height (path of
segment deceleration and ...) and is saved.
The component used for the teaching
procedure is rejected.
C&P6/12 Placement Head
Z-Axis Down Travel Profile - Pickup
Student Guide Advanced Level 2 SIPLACE D Series
EN 05/2007 C&P6/12 Placement Head
8-7
Axis controller switches:
– When the taught pickup height is reached, end position signal for Z-axis positioning is issued.
The machine controller switches:
– Valve positioning drive for switching over to vacuum ON.
The positioning procedure for "upwards" is identical to that for standard pickup.
Benefits of special mode "contactless pickup"
The function option "contactless pickup" offers the following benefits:
Prevents touching of component feeder unit and the possible resulting component shift/jump.
Increases the pickup reliability for small COs, lightweight COs and exotic COs. The nozzle "hovers"
about 0.1 mm above the component surface. When the vacuum is switched on, the nozzles sucks
up the component from the tape pocket!
No time loss during pickup (compared to standard pickup).
The function is NOT limited to 0201 component shapes, certain nozzle types or feeder types.
In this programming mode, early vacuum is also
programmed, which is illustrated by the time
between "end signal downward" and "Start
upward".
Legend
1. Light barrier signal Z-axis LB top
2. Light barrier signal Z-axis LB bottom
3. Uncommutated motor current for Z-axis
4. End position signal for Z-axis
1. Section : Z-axis down (20 ms)
2. Section : Z-axis up (18 ms)