4 Units Description 
4-9
4.2.3.2  Probe Drive Assembly 
Figure 4-9 Probe Drive Assembly 
 
 
Dismounting steps are discribed as follows. 
A.  The horizontal stepping motor is fixed to the motor support with four M3X12 hexagon 
socket  head  screws  allocated  with  plain  pad  and  spring  pad.  First,  remove  the 
horizontal stepping motor by loosening the four screws, and then take out the horizontal 
synchronous belt,  and  then remove  the horizontal  synchronous belt  wheel which  is 
fixed to horizontal stepping motor by loosening two M3x5  hexagon socket head  set 
screws. 
B.  The vertical stepping motor is fixed to the bracket with three M4X16 hexagon socket 
head screws allocated with plain pad and spring pad. First, remove the vertical stepping 
motor by loosening the three screws, and then remove the vertical synchronous belt 
wheel which is fixed to vertical stepping motor by loosening two M3x5 hexagon socket 
head set screws. 
C.  Remove the dustproof cover by loosening four M3x6 cross pan head screws, and then 
remove the press plate by loosening two M3x6 cross countersunk head screws, and 
finally take out the vertical synchronous belt. 
D.  The horizontal senor is fixed to the motor support with one M3X6 hexagon socket head 
screw. Remove horizontal sensor by loosening the screw. The vertical sensor is fixed to 
the bracket using one M3X6 hexagon socket head screw. Remove vertical sensor by 
loosening the screw. 
E.  The limited position plate which is fixed by three M3X6 cross pan head screws can 
adjust horizontal position of the probe arm assembly.   
F.  Reverse the steps described above to mount the probe drive assembly.