LM-901 machine from FRITSCH is used for the most
important process in PCB manufacturing. The LM-901 series is the basis of the
FRITSCH manual mounting systems. The machine is mainly used for :
- Ø
Picking and placing of SMD Components
- Ø
Solder paste application
- Ø
Manual Optical Support
Accuracy in placing the SMD components is maintained
due to the smooth functioning of the mounting head device.
FEATURES:
- Ø Universal circuit board holder
- Ø Component
flipping station
- Ø
Ergonomics
- Ø
Assembly head
- Ø
Dispenser
- Ø
X/Y/Z locking
- Ø
Camera
- Ø
Head Lighting
- Ø
Component dispenser
- Ø Carousel
COMPONENT FLIPPING STATION
SMD components are exceedingly small in size and are
not easy to handle by hand. Hence, this machine comes to the rescue. As the
below picture depicts, there are 3 points marked, indicating the order of
process for flipping a component. Initially, the component is placed at point
1. At point 2, an optical sensor is placed. After placement, the sensor enables
the turning mechanism and hence the component is flipped and placed at point 3.
UNIVERSAL CIRCUIT BOARD HOLDER
Adjustable screws facilitate perfect placement of PCB
Boards. In our lab, we worked by placing 3 boards at a time.
ERGONOMICS
Relocatable hand rest, facilitating component
placement with very less human error. This way, shaky hands won’t be a problem.
ASSEMBLY HEAD
The assembly head is provided with a patented
constant-force trapezoidal spring. The spring tension is distributed equally
over the entire range of the Z-axis.This assembly head consists of the main
unit that sucks up the component with a vacuum on the first click and releases
the component on the second click. If these two operations are not done, the
machine gives a “click” sort of sound.
Compressor
suction capacity: 50 l/min
DISPENSING UNIT
There is a dispenser system available to integrate
into all manipulators. Besides soldering paste and adhesive, other media can
also be dispensed. The dispenser system automatically switches on the
dispensing process as soon as the slanted dispenser needle comes into contact
with the PCB. The vertical syringe ensures that the dispenser needle does not
slip sideways when touching the PCB. Three programmable dispensing times are
available for the dispensing on different pad sizes. They can be preset in the
menu as required.
X/Y/Z LOCKING
The
X/Y-locking provides precision while placing components or dispensing paste or
glue. Individual axes can be locked. An automatic function independently locks
the X and Y axes when the component is lowered or dispensing a dot. The Z-locking enables the holding of the components in a
position of levitation close to the PCB. This simplifies the assembling of
Fine-Pitches and non-standard components because an exact calibration between
PCB and component is possible.
LED INDICATORS
The first LED represents the power ON/OFF. The third LED goes ON when the vacuum sucks up the component and holds tight. The second LED goes ON when the component is released.
CAMERA ,MONITOR
The camera helps in viewing the component
and the PCB board on the monitor. This way, we can check the component placement.
COMPONENT FEEDER
Light
Manipulators are equipped with the FRITSCH rail system. Various feeders can be
installed and exchanged fast – even as complete sets. This means the whole
range of SMD shapes can be processed
HEAD LIGHTING
The LEDs are
placed on both sides of the nozzle ,enabling constant and permanent lightening
under the assembling head.
CAROUSEL
Offers
smooth acceleration to transport the components gently. By using this
manual carousel ,bulk components can be supplied to the machine.
TECHNICAL DATA:
- Ø Assembly capacity is 300-600
smds/hour
- Ø Dimensions: 600 mm x 600 mm
- Ø Max. Size of PCB: 245 mm x 440 mm
- Ø Max. Assembly area: 245 mm x 350 mm
- Ø PCB thickness: 0,5 mm bis ~ 4 mm