00195193-02 SG D4 FSE en (1) - 第188页
Gantry Overview Mechanical Structure of X and Y Axes S tudent Guide SIPLACE D4 (FSE) Gantry EN 09/2006 174 8.1.1 Mechanical Structure of X and Y Axes 8.1 - 2: Mechanical structure of gantries – part 1 Legend 1 Precision-…
Gantry
Overview
Student Guide SIPLACE D4 (FSE)
EN 09/2006 Gantry
173
8Gantry
8.1 Overview
The gantries of the SIPLACE D machines each consist of an X and a Y axis. The Y-axis is driven by a
linear motor with integrated temperature sensor. The X axis is driven by a three-phase servo motor,
equipped with an integrated temperature sensor, and a belt. When viewed from the direction of transport,
the Y motors move from the right to the left side in positive counting direction and the X motors move
from the input conveyor to the output conveyer in positive counting direction. The placement heads are
mounted on the head plates of the respective X axis.
8.1 - 1: Position of gantries in D4 machines
Legend
1 Gantry 1 in placement area 1 7 PCB camera under the X-axis (here: gantry 4)
2 Gantry 2 in placement area 2 8 Y-motor, primary part – linear motor
(here: gantry 4)
3 Gantry 3 in placement area 2 9 Y-motor, secondary part – magnets
(here: gantry 4)
4 Gantry 4 in placement area 1 10 X motor (here: gantry 4)
5 X-axis (here: gantry 1) 11 Belt for X motor (here: gantry 4)
6 Y-axis (here: gantry 1) T Transport direction
Gantry
Overview Mechanical Structure of X and Y Axes
Student Guide SIPLACE D4 (FSE)
Gantry EN 09/2006
174
8.1.1 Mechanical Structure of X and Y Axes
8.1 - 2: Mechanical structure of gantries – part 1
Legend
1 Precision-cast gantry 7 X motor unit
2 Head mount 8 Toothed belt
3 Read unit for Y-axis incremental scale 9 Deflection unit
4 Primary part Y-linear motor 10 Y-axis brake, external
5 Motor bracket 11 Y-axis brake, internal
6 Thrust bearing
Gantry
Mechanical Structure of X and Y Axes Overview
Student Guide SIPLACE D4 (FSE)
EN 09/2006 Gantry
175
8.1 - 3: Mechanical structure of gantries – part 2 -view from below
Legend
X axis
With the help of a toothed belt drive, the rotary movement of the X-axis motor is directly converted into
a lengthwise movement of the placement head, in the X-direction.
The linear guide rails under the X-axis guide the head assembly plate and the placement head along the
X-axis.
The X-motor is cooled by a fan at the Y-axis pickup position and the motor temperature is also monitored
by a sensor.
Y axis
A linear motor positions the entire gantry (X-axis, head assembly plate and placement head) in the Y-
axis direction. This linear motor consists of a primary and secondary part. The secondary part consists
of permanent magnets, which are fastened lengthwise (Y direction) to the machine frame.
The primary part consists of inductors (motor windings), which are directly fastened to the gantry, in a
casing.
Determining the position
To accurately position the axes, the machine uses incremental scales (metal), which are attached
between the linear guide rails (X-axis or under the secondary part, by the Y-axis).
A corresponding incremental encoder reads the increments from the incremental scales and generates
track signals as a result. The encoder transmits the track signals to the axis control card, which uses the
track signals to determine axis position and to control the motor.
1 Y-axis brake 5 2x linear guide rails, each with a linear bearing
2 X-axis brake 6 X-axis incremental scale
3 Digital PCB camera with optical system 7 Elastomer spring 25x10.5x50
4 X axis read unit