3Flex Service Manual
Elevator
Aug 2013
2-17
Elevator
The elevator module consists of a stepper motor controller/driver, a stepper motor, three sensors, drive
shaft, guides, and mechanical support blocks, framework, and cabling. The elevator is designed so that
it can be connected to a power source (+24 VDC) and to a controller via RS-232, and operated
independent of any system. There are no PCB assemblies associated with this elevator design.
The three sensors detect upper-bound travel, home position, and over-travel in the downward position.
the upper-bound position sensor location is adjustable for different travel-length applications. .
The elevator is capable of lifting a full Dewar of liquid nitrogen (approximately 37 lbs). It moves
slowly to prevent spilling and is shielded to prevent the operator.
In normal operation, the elevator moves between home and EOT-up positions. It can be stopped at
intermediate positions using manual control.
Proximity
sensors (3)
Left side of assembly
(from rear of unit)
Right side of assembly
(from rear of unit)
Stepper motor
Drive control
stepper
Dewar tray
