LX80L Series Product Manual
43
Parker Hannifin Corporation
EMN Automation - Parker
Irwin, Pennsylvania
Speed Limits
Acceleration of linear servo driven tables is typically limited by three
(3)
factors:
•
Linear Bearings
The linear bearings used in the LX80L are limited to a maximum speed of 3 meters/second.
•
Linear Encoder Limit
The linear encoder has speed limits relative to encoder resolution; these limits are listed below:
Encoder
Resolution
Maximum Velocity
Required Post Quadra-
ture Input Bandwidth (²)
5 micron
5 meters/second (
1
)
2 MHz
1 micron
3 meters/second(
1
)
6.7 MHz
0.5 micron
1.5 meters/second
6.7 MHz
0.1 micron
0.3 meters/second
10 MHz
(¹) When using an encoder with 5 micron resolution, velocity limited by speed dependant force.
(²) This is the bandwidth frequency that the amplifier or servo control input should have to operate properly with the encoder output at
maximum speeds. This frequency is post-quadrature, to determine pre-quadrature divide above values by 4. Above frequencies include a
safety factor for encoder tolerances and line loses.
•
Force / Speed Limit
The available force of the LX80L reduces as speed increases. (Chapter 2,
LX80L Series Techni-
cal Data
)
Summary of Contents for LX80L
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