Seamless Rotary Guidance System: Bishop-Wisecarver 1-Trak Part II

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Motion Without Limits ®
Introducing PRT2 1-Trak: Part II of III
A Seamless Ring and Track Guided Motion System

OUTLINE OF OVERVIEW — PART II OF III
Overview
Driving By Gears
Gear Options
PRT2 Tracks Via 1-Trak Route
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

1-TRAK APPROACH TO DRIVING BY GEARS

1-TRAK APPROACH TO DRIVING BY GEARS
The pinion in a fixed position on the carriage, and the
pitch line of the gear follows the 1-Trak path

DRIVING BY GEARS EXAMPLE

GEAR DRIVEN 1-TRAK SYSTEMS
Gear teeth are surface hardened high tensile steel:
same as the slide vees
Driving forces and durability are excellent
Making these gears is difficult: pitch line follows a
complex path, and the shape of the teeth changes
with path curvature
Utilize dedicated CAM system to generate gear
profiles for any track system and any pinion position

GEAR DRIVEN 1-TRAK SYSTEMS
When the driving pinion is located off-center, the path of
the gear becomes more complex and asymmetrical
There will be no problem for the new CAM system

1-TRAK GEAR OPTION
The production method works best with gears of
MOD3 or larger with the following tooth widths:
MOD3 up to 12mm wide
The most suitable Hepco pinions are in the HDS2
catalogue
We also now have a MOD8 stock pinion for use with
HDRE1656G8: HP8X17

1-TRAK GEAR OPTION
Detailed gear drive calculations will need to be
referred to an Applications Engineer
For provisional sizing:
Use HDS2 figures pro-rated for width, and then add 50%
due to higher specification of gear teeth

1-TRAK GEAR OPTION
The shape of the gears on the track will be defined if
the pinion size (MOD and number of teeth) is defined,
along with the location of its center on the carriage
Ensure that there is enough space to accommodate the
pinion — remember that in designs where the pinion is
away from the carriage center, the gear pitch line will
deviate a long way from the track vees

1-TRAK GEAR OPTION
Specify either a gearbox or a drive flange assembly
(for example from HDS2 catalog)
Lubrication is essential
In some cases it will be possible to use HDS2 automatic rack
lubrication method, directly onto the pinion

PRT2 TRACKS VIA 1-TRAK ROUTE
It is possible to have the benefits of 1-Trak
construction, e.g. one-piece, integral base plate and
structural strength, but using the standard PRT2 track
shapes and FCC or BCP carriages
(which are stronger than three-bearing carriages)
Just specify the track system using the standard PRT2
method, state “made via 1-Trak route”, and then
provide a sketch to show relevant base plate and
customization details

PRT2 TRACKS VIA 1-TRAK ROUTE
The 1-Trak approach may
also be used on more
complex systems
DTS could be made via this
construction
DTS2 also possible

CONTINUED…
Be sure to view part III of III in the 1-Trak overview
series for more information on:
How To Specify 1-Trak
Available on the Bishop-Wisecarver’s SlideShare:
(www.slideshare.net/bishopwisecarver)

THANK YOU
Have questions? Please contact…
An Applications Engineer at (888) 580.8272
Or email info@bwc.com
Learn more on our website at www.bwc.com

Seamless Rotary Guidance System: Bishop-Wisecarver 1-Trak Part II

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