Parker MX80S Series, Product Manual

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MX80S Series Product Manual
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Parker Hannifin Corporation
EMN Automation - Parker
Irwin, Pennsylvania
Chapter 4 - Performance
Acceleration Limits
Acceleration of linear servo driven tables is typically limited by four (4) factors:
•
Linear Bearings
The linear bearings used in the MX80S have a continuous acceleration limit of 2 g ’ s. This means
that the bearings are designed to take repetitive accelerations of 2 g ’ s and maintain the rated
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, MX80S Series Technical Data to determine bear -
ing load life for your application).
•
Available Motor Force
This is the primary factor that reduces acceleration. This is simply the amount of motor force avail
able to produce acceleration. The larger the inertial and or frictional load the lower the accelera -
tions 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 ac
ceptable 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.
Speed Limits
Acceleration of the MX80S table is limited by the maximum screw speed:
Screw Lead Maximum Velocity
1mm Leadscrew 20 mm/second
2mm Leadscrew 40 mm/second
10mm Leadscrew 200 mm/second
2mm Ballscrew 100 mm/second