Galaxy EX ProFlow Module - 第3页
PR O FLO W MO DU LE OVERV IEW Ch apte r Issue 4, J un 18 Tech nical Ref erenc e Ma nual 11.3 Th e sen sor us ed to de te ct pas te ma y be one of two t ypes : • Pro F low C asse t te Low S en sor - Ree d Sw itch (war ns …
PROFLOW MODULE
OVERVIEW
11.2 Technical Reference Manual Chapter Issue 4, Jun 18
The ProFlow mechanism is driven backwards and forwards across the screen
by the print carriage applying printable material directly onto the screen. This
alleviates the need for squeegees and a paste dispenser.
The ProFlow mechanism is raised and lowered, to the screen by means of a
stepper motor, applying a downward force directly onto the screen providing a
positive seal between the transfer head and screen. This eliminates leakage of
print material above the screen.
Paste pressure (pneumatic), is applied to the piston crosshead exerting a
force onto the print material which, in turn, forces print material into the
ProFlow conditioning chamber and into the screen apertures.
As the unit moves across the screen the trailing wiper, within the transfer head,
lifts the print material from the screen surface, clearing the screen of print
material. In addition, the trailing wiper creates a rolling movement of material
within the conditioning chamber.
Figure 11-7 ProFlow Cross Section (with cassette option)
ProFlow Pressure
Mechanism
Transfer
Head
Stencil
Board
ProFlow M ovem ent (YAxis)
Wiper
Piston
Crosshead
Pneum atic
P ressure
S ystem Pressure
Print Material
Side Chambers
Cassette
Nozzle
Cassette
Plunger
PROFLOW MODULE
OVERVIEW
Chapter Issue 4, Jun 18 Technical Reference Manual 11.3
The sensor used to detect paste may be one of two types:
• ProFlow Cassette Low Sensor - Reed Switch (warns the operator when
the paste reaches a certain level)
• ProFlow Paste Level Sensor - Giant Magneto resistive (displays to the
operator a percentage of paste remaining (time-to-go))
In both cases the sensor is fitted to the left hand side pressure mechanism
pneumatic actuator, as shown in the figure below.
Figure 11-8 ProFlow Sensor and Stepper Motor Locations
View on R ear of ProFlow Printhead M echanism
ProFlow Home Sensor
Drive Belt
Stepper Motor
View on Front of ProFlow P ressure M echanism (cover rem oved)
Pneumatic Actuator
15
0
30
Paste Level Sensor
or
Cassette Low Sensor
PROFLOW MODULE
OVERVIEW
11.4 Technical Reference Manual Chapter Issue 4, Jun 18
The following configurations of ProFlow are available for use on the machine:
Cassette The ProFlow cassette is available in 300mm size only (capacity approximately
800g - 850g solder paste).
Transfer Head The table below lists the types of optional transfer head units and sizes
available, for use with ProFlow:
NOTE
All of the above cassette transfer heads are fitted with the standard 300mm
cassette and 300mm piston crosshead. A dedicated piston crosshead is
required for each rechargeable transfer head size.
Transfer Head Type
Transfer Head Sizes (mm)
150 300 350 400 450 500
Cassette Type (single conditioning chamber)
Yes Yes Yes
Cassette Type (dual conditioning chamber)
Yes Yes Yes
Rechargeable Type (single conditioning
chamber)
Yes Yes Yes Yes Yes
Rechargeable Type (dual conditioning chamber)
Yes Yes Yes Yes Yes Yes