Epson G3 Series User Manual

Page of 92
Setup & Operation  4. Setting of End Effectors 
 
G3 Rev.1 
45 
(c) Moment of inertia of a sphere 
 
m r 
2
+ m 
× L
2
 

Sphere’s center of gravity 
Mass (m) 
Rotation center 
 
 
 
4.4    Precautions for Auto Acceleration/Deceleration of Joint #3 
When you move the Manipulator in horizontal PTP motion with Joint #3 (Z) at a high 
position, the motion time will be faster.     
When Joint #3 gets below a certain point, then auto acceleration/deceleration is used to 
reduce acceleration/deceleration. (Refer to the figure below.)    The higher the position of 
the shaft is, the faster the motion acceleration/deceleration is.  However, it takes more 
time to move Joint #3 up and down.    Adjust the position of Joint #3 for the Manipulator 
motion after considering the relation between the current position and the destination 
position. 
The upper limit of Joint #3 during horizontal motion using Jump command can be set by 
the LimZ command. 
 
Automatic acceleration/deceleration vs. Joint #3 position 
 
120 
100 
80 
60 
40 
20 
0     -30 
-60   -90   -120   -150  (mm) Shaft height 
(%) 
*  Figures on the graph (%) are 
the proportion to the 
acceleration/deceleration speed 
at the shaft upper limit position.
100
60 
100 
100
30
G3-25*** 
G3-30*** 
G3-35*** 
 
 
When moving the Manipulator horizontally while the shaft is being lowered, it may cause 
over-shoot at the time of final positioning. 
)
NOTE