HS50_advance_level 2 - 第223页
Stud ent Gu ide HS-5 0 Adva nced II 07/2 002 Ed ition 8 Y- Axis 5 < $ [ L V 2YHUY LHZ The placem ent syst em is equi pped wi th four gan tries. Thes e enab le the fo ur coll ect&place h eads to be posi tion…
1 - 4
Contents Student Guide HS-50 Advanced II
07/2002 Edition
4
Student Guide HS-50 Advanced II 07/2002 Edition
8 Y-Axis
5
<$[LV
2YHUYLHZ
The placement system is equipped with four gantries. These enable the four collect&place heads
to be positioned in the x and y directions with great accuracy and independently of one another.
(1) Gantry 1 (2) Gantry 2
(3) Gantry 3 (4) Gantry 4
1
4
2
3
07/2002 Edition Student Guide HS-50 Advanced II
8 Y-Axis
6
The structure of the gantries makes them very torsionally rigid. Precise mechanical movements
of the axes are produced by axis recirculating ball screw units.
High-precision positioning systems determine the positions of the x and y axes. To do this, the
graduations on metal scales are optoelectronically scanned and the track signals are sent to the
axis control in the control unit.
Direct drive units are used to position the placement heads in the x and y directions. This elimi-
nates friction losses, for example, which are typical when complex gearing is used. In addition,
there is none of the wear that can significantly affect the accuracy of positioning systems over the
course of time.
<D[LVGULYH
The translatory movement of the placement head in the y direction is generated by a linear motor.