412LXR Series Product Manual
Chapter 4 - Performance
28
Chapter 4 - Performance
Acceleration Limits
Acceleration of the 412LXR is limited by four (4) factors:
•
Linear Bearings
The Linear bearings used in the 412LXR have a continuous acceleration limit of 2 g’s. This means that
the bearings are design to take repetitive acceleration of 2 g's and maintain the rated bearing life.
Additionally, the bearings can take a periodic acceleration of up to 5 g’s, however continued
accelerations of these magnitudes will reduce bearing life.
•
Reduced Bearing Life
Bearing loading due to high acceleration may reduce bearing life to an unacceptable application limit.
This is not usually a limiting factor unless loading is significantly cantilevered causing high moment loads
during accelerations. (Chapter 2, 412LXR Series Technical Data to determine bearing load life for your
application)
•
Available Motor Force
This is the primary factor that reduces acceleration. This is simply the amount of motor force available to
produce acceleration. The larger the inertial and or frictional load the lower the accelerations limit.
•
Settling Time
In many applications reducing cycle time is a primary concern. To this end, the “settling” time (the
amount of time needed after a move is completed for table and load oscillating to come within acceptable
limits) become very important. In many cases where very small incrementing moves are executed, the
settling time is greater than the actual move time. In these cases accelerations may need to be reduced
thus reducing the settling time.