MagnaTran 7.1 User’s Manual
Subsystems
MN-003-1600-00
Mechanical System
Brooks Automation
Revision 2.2
4-7
Z Axis Drive Assembly
The Z axis drive is coupled beneath the T1/T2 drive assembly. A mechanical bellows
located between the mounting flange and the top of the drive assembly isolates the
vacuum allowing the Z axis drive to move the T1/T2 drive along the Z axis.
The Z axis drive consists of a brushless DC servo motor and ball screw system that
moves the T1/T2 drive assembly along a vertical plane causing the arm set to move
up and down. Control electronics coupled with the rotary encoder allow precision
movement in the Z axis. A fail-safe brake freeze the movement of the drive when
power is removed. The Z axis drive is attached and located below the T1/T2 drive
assembly and is surrounded by the printed circuit boards.
The Z-axis drive assembly and related components which pertain to Z axis movement
of the arm set are listed below:
•
Z-axis drive carriage (part of frame)
•
Z-axis linear slides (part of frame)
•
ball screw
•
fail-safe break
•
direct drive D.C. motor
•
two Z-axis over travel sensors (part of frame)
•
Z-home flag (part of frame)
•
Hall Effect sensor
The frame of the robot has a carriage and rails. The motor driven ball screw is
mounted to the bottom of the T1/T2 drive assembly.
