LA Series Linear Actuator Manual
- 7 -
(3)Short stroke positioning accuracy
A. Actuator rod moves toward pushing direction until the stroke center.
The position is assigned to “Base
position”.
B. Form the base position, the rod moves pushing direction 100 steps by 0.4
m pitch measuring every position.
(Total measuring range is 40
m.)
C. Position errors are calculated for every position by subtracting the actual position value from its ideal value.
The full stroke positioning accuracy is obtained as the difference of the maximum error and the minimum error.
(4)Lost motion
A. Actuator rod moves toward pushing direction until the stroke center. The position is named [A
0
].
B. Form [A
0
], the rod moves 1mm toward pushing direction. The position is named [A
1
].
C. The rod draws 1mm toward pulling direction, and the position is measured. The position is named [P
1
].
D. The rod draws 1mm toward pulling direction [A
1
’] in succession.
E. Then it moves 1mm toward pushing direction, and the position is measured. The position is named [P
1
’].
F. Above push-pull motion is repeated seven times in total. Then seven pairs of positions (P
1
, P
1
’, P
2
, P
2
’, …, P
7
,
P
7
’) are measured. The lost motion is obtained as the difference between the average of [P
1
, P
2
, … P
7
] and
[P
1
’, P
2
’, …, P
7
’].
