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Chapter 3 - Python Linear Module Descriptions
Linear module repeatability is a function of linear resolution, servo performance, ball
screw linear clearances, friction, payload, etc. Unidirectional and bidirectional
repeatability values as measured per ISO 232 for Python modules are specified in the
following table.
Ground Screws:
Unidirectional
Bidirectional
Rolled Screws:
Unidirectional
Bidirectional
Thrust
Python linear modules are capable of generating significant intermittent axial thrust
forces for applications such as insertion. As long as the thrust force is applied slowly (i.e.
non-impacting) and the resultant pitch moments are within the Carriage Maximum
Transportable Moments specified in table
successfully perform millions of repeated operations. The maximum non-impact thrust
force capabilities are dependent upon the ball screw lead. See the following table for
details.
Table 3-11. Maximum Non-impact Axial Thrust Force
Module
L18
L12
L08
NOTE: Continuous thrust values are approximately 30% of the values
listed above, limited by the motor duty cycle limitations.
Brakes
Python linear modules can be configured with or without payload-holding brakes. The
brakes used on L18 and L12 modules are ball screw shaft-mounted brakes and are located
at the end of the module, opposite the motor. L08 modules use motor-mounted brakes.
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Table 3-10. Linear Module Repeatability
In-Line Motors
±6 µm
±8 µm
n/a
n/a
Table 3-3 on page
5 mm Pitch
n/a
200 kg
n/a
200 kg
140 kg
70 kg
Adept Python Modules User's Guide, Rev. E
Wrap-Around
Motors
±15 µm
±20 µm
±20 µm
±50 µm
40, the modules can
10 mm Pitch
20 mm Pitch
100 kg
100 kg
35 kg
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