seamless rotary guidance system: bishop-wisecarver 1-trak part iii

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Motion Without Limits ®

Introducing PRT2 1-Trak: Part III of III

A Seamless Ring and Track Guided Motion System



OUTLINE OF OVERVIEW — PART III OF III

1-Trak System Overview

Suitability Checklist

How To Specify

Contact Information



NEW! PRT2 1-TRAK

1-Trak extends the capability of PRT2

Patent pending design with three key innovations:

Create almost any 2D shape of track in one piece

(within the maximum size limits and minimum bend radii)

Three-bearing geometry allows a carriage to run around any

2D shape of track

Available with or without gear drive



SUITABILITY CHECKLIST — YES?

Bends tighter than a PRT2 track?

‘S’ bends or multi-radius curves AND many bogie carriages?

No joints and no assembly?

Integral base plate?

Structural strength of 1-piece construction?

Total flexibility of section, path and customisation?

Gear driven track?

Rectangular section track?

High volumes of small tracks?



HOW TO SPECIFY PRT2 1-TRAK

Systems are made-to-order

Each system will have a drawing for approval(no long part numbers)

The carriage is central to the design — take the usual approach for provisional selection of bearing size:

Bearings from …J13… (60 N) to …J150… (50 000 N)

The single bearing can be larger — this can be helpful for systems with integral base plates open in the middle




As a first approximation of carriage load capacity (LA)

will be the sum of axial load capacity (LA1) for all three

bearings: LA = LA1 + LA2 + LA3

Basic statics calculations will determine bearing loads

Use the load factor (LF) equation to determine life

Amend bearing selection and spacing if required,

and re-calculate life




The shape of the track should be defined by the

path taken by the centres of the pair of bearings

for three-bearing track systems

This is best communicated by a sketch, or by a

CAD file for complex or unusual shapes such as

ellipses, parabolas or B-splines

A point on the carriage which is NOT one of the

pair of bearings can be a defined path and

followed

The design is more complex with extra charge




The maximum sizes for 1-Trak systems are 5.5m x

1m or 1.9m square

Any thickness up to 100mm is possible

Material cost is significant — tracks are machined

from solid so don’t design too big

For economy, make the thickness of the system at or

below a standard thicknesses:

9, 12.5, 18, 25 or 36mm




Consider an integral base plate as a lower cost optionThe track is made from a plate which will otherwise have to be machined away

Consider a wide track section to increase moment load capacity, and makes the track stronger

Otherwise the material will have to be machined away

Good lubrication is important, but it is not always easy to accommodate lubricators

Think about the Bleed Lube Option




Note the number of carriages required

What materials are required?

Stainless steel bearings and SL2 type coating of

aluminium carriages are available

Verify with BWC any surface specification for corrosion

resistant tracks




Applications with a

base plate can be

provided fully

assembled on an

MCS frame

Save work, save time



FOR MORE INFO

Be sure to view the complete series of 1-Trak on

the Bishop-Wisecarver SlideShare library at:

(http://www.slideshare.net/bishopwisecarver)

Introduction

Driving By Gears

How To Specify

Download the product catalog at: (www.bwc.com)

http://www.slideshare.net/bishopwisecarver

http://www.bwc.com/



THANK YOU

Have questions? Please contact…

An Applications Engineer at (888) 580.8272

Or email [email protected]

Learn more on our website at www.bwc.com

seamless rotary guidance system: bishop-wisecarver 1-trak part iii

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