Subscribe to our free, weekly email newsletter!


Lift uses actuating screw to create stable rise

Custom lift provides safer ride, more controlled vertical movement of satellites at Boeing manufacturing facility.
By Josh Bond, Senior Editor
October 02, 2012

Precise movement is a way of life for satellites, and at a Boeing manufacturing facility just outside Los Angeles International Airport, the precision begins on the very first trip a completed satellite takes. The trip, all of 3 feet, is from the assembly deck to the main floor on the platform of a custom designed vertical lift.

Designed to move very sensitive loadPfls, the lift uses an actuating screw to elevate an 18.5-foot by 20-foot platform without the subtle bounces or deflections that can occur with a hydraulic or mechanical lift. The satellites made at the facility range in size from 10 feet to 20 feet in diameter, with heights up to 60 feet and weights up to 60,000 pounds. They are assembled in a cleanroom environment before the 80,000-pound capacity lift transports satellites and/or component parts from the assembly deck to a testing area and finally to shipping.

The 3-foot trip takes approximately 3 minutes in each direction, with horizontal step displacements of no more than 0.01 inches during vertical movement, and horizontal variations of less than 0.02 inches over any 10 feet of travel.

A variable speed drive is installed on each of the motors, ensuring that each motor starts and stops smoothly and moves at a steady, coordinated speed. The screws are also electronically synchronized to make sure the motors are in the same position on each screw, keeping the platform perfectly level. If the screws become out-of-sync, an audio alarm is triggered.

The screw lift replaced an older hydraulic lift, providing smoother movement, more stability and control, and a reduced likelihood of product contamination by hydraulic oil.

Pflow Industries
414-352-9000
http://www.pflow.com

Read more from the 2013 Casebook.

About the Author

Josh Bond
Senior Editor

Josh Bond is Senior Editor for Modern, and was formerly Modern’s lift truck columnist and associate editor. He has a degree in Journalism from Keene State College and has studied business management at Franklin Pierce University.


Subscribe to Modern Materials Handling magazine

Subscribe today. It's FREE!
Find out what the world’s most innovative companies are doing to improve productivity in their plants and distribution centers.
Start your FREE subscription today!

Recent Entries

You’ve heard the old saying, it was the best of times, it was the worst of times. Rob Handfield sees this as the best of times for procurement professionals, who have an opportunity to deliver real value to their organizations.

While core metrics were down from a very impressive July, the August edition of the Non-Manufacturing Report on Business from the Institute of Supply Management (ISM) was still very strong.

Company's multi-tenant SaaS solution enables quick onboarding of new trading partners and omni-channel capabilities.

The Institute for Supply Management’s (ISM) August edition of the Manufacturing Report on Business saw its PMI, the ISM’s index to measure growth, fall 1.6 percent to 51.1, following a 0.8 percent decline to 52.7 in July. Even with the relatively slow growth over the last two months, the PI has been at 50 or higher for 31 consecutive months.

Global demand remains stable as packaging equipment providers of all sizes shift focus.

Article Topics

News · Fixed Path · Casebook 2013 · Pflow · All topics


© Copyright 2015 Peerless Media LLC, a division of EH Publishing, Inc • 111 Speen Street, Ste 200, Framingham, MA 01701 USA