Artisan bakery - DPN Staff

40 Pages·2008·11.39 MB·English

Inside: Adhesives & Fasteners ■ Power Transmission ■ Bearings ■ Materials
Design
March/April
2008
ProDuCT
news
Covering the total design engineering function in Canada
Artisan bakery
Programmable controller
The CP 2xx/3xx HLC from Phoenix Con-
tact is a combination controller/display adopts advanced
that can be programmed using Microsoft
Visual Studio .NET without having to pay
a license fee. Units have an Ethernet I/O in-
automation
terface and integrated TCP/IP stack.
phoenixcontact.ca
▼
Pro/engineer wildfire 4.0
PTC has announced Pro/ENGINEER
Wildfire 4.0, a release of its integrated
3D CAD/CAM/CAE software. Enhance-
ments include: Auto Round technology;
improved large assembly performance and
data exchange; ribbon cabling; and, an
ECAD-MCAD Collaboration Extension.
ptc.com
PLCs enhance motion control
SEW-Eurodrive Company of Canada Ltd.
has introduced the MOVI-PLC Basic, a
programmable logic controller that uses the
international PLC programming standard,
IEC 61131. The MOVI-PLC also includes ▼
the additional graphical programming lan-
guage, continuous function chart (CFC).
sew-eurodrive.ca By Mike Edwards types of bakery equipment. According to me-
chanical engineer Robert Casasanta, VP of Engi-
W
hen people think of artisan bak- neering (above), the company “started manufac-
Volume 36 Number 2 ing, the image of solitary bakers turing in a small capacity” in 1988 after it moved
sliding loaves in and out of stone to a larger facility to accommodate growth.
ovens in the wee small hours of The company’s latest innovation, a patent-
the morning springs to mind. But a Canadian bak- pending 100-ft automated oven designed by
ery equipment manufacturer has launched oven Casasanta, has been up and running at commer-
technology that automates this traditional practice cial baker Italian Home Bakery Ltd. in Toronto
2 with no sacrifice in product quality and taste. (ihbakery.com) since the latter half of 2007. IHB
60 LC Bakery Equipment Services Ltd. of Brant- specialty breads, from kaiser rolls and ciabatta
3
6
00 ford, ON (lcbakery.com), was established in 1984 buns to Italian loaves and pita breads, can be
4
M# as a 24/7 family-run maintenance business for all baked simultaneously in the hundreds by the
P
PAP Registration No. 10773
Continued on page 8
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Untitled-1 1 2/22/08 8:38:34 AM
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Untitled-8 1 2/21/08 11:20:10 AM
44 DDeessiiggnn PPrroodduucctt NNeewwss ddppnnccaannaaddaa..ccoomm NovembeMr/Daercche/mAbperirl 22000087
In this issue
DePArTMenTs:
6 By Design
Designfusion acquires Mobius
to extend CAD coverage
10 Power Transmission
The linear guide choice:
round or square?
20 CAD industry watch
review evaluates Battle of
6 28
the CAD Labs: solidworks vs.
Autodesk
38 Advisory Board Directions
Phoenix Contact Canada celebrates electronic wedge Brake design passes
CADmech’s Bozena Kunowski
25th anniversary with expansion plans test in wintery road track conditions
takes a detailed look at
knowledge-based engineering
Andreas sobotta noted that continued growth has meant the we are on the brink of a significant change in vehicle
company needs a larger facility to accommodate an expanded braking systems, says Automotive scene columnist Bill
warehouse, a training centre and to provide room for value-add- Vance, to the point where traditional hydraulic brakes
ed design and assembly of industrial automation components. may eventually fade away.
Advertisers
Index
Ace Controls Inc ...................................17
Alpha Gear Drives Inc ..........................10
Altair Engineering ................................16
Amacoil Inc ..........................................12
Associated Spring Raymond ................27
Autodesk Canada...................................7
16 22
AutomationDirect .................................3
Balluff Canada Inc ...............................34
Baumer Electric ....................................37
san Francisco hosts Autodesk sneak Plastic bearings find their way into Bimba Manufacturing Co .....................11
preview of 2009 CAD software public transit vehicle wheelchair ramps Birde Marketing ...................................30
Bosch Rexroth Canada Corp ..................5
Carl Bass, Ceo of Autodesk, warned of the global trend toward orion model buses designed in Mississauga, on, Brecoflex Co., L.L.C. .............................12
“ruthless commoditization,” and demonstrated why product employ iglide bearings from igus inc. to provide pivot Carlo Gavazzi (Canada) Inc ..................26
developers need to employ digital prototyping tools. point and resist dirt from city streets.
Chartwell Electronics Inc ......................22
Clippard Instrument Laboratory ...........40
Conec Corp ..........................................35
Inside: Enterprise CAD ■ Power Transmission ■ Sensors ■ Enclosures ■ Fluid Power
Cords Canada ......................................25
Craftech Industries Inc .........................23
DESIGN
Creaform Inc ........................................34
November/ Daemar Inc ..........................................30
PRODUCT December 2007
General Magnaplate Corp ...................18
GGB LLC ...............................................37
NEWS Harmonic Drive LLC .............................12
ifm efector Canada ..............................29
Interpower Corp ...................................39
Covering the total design engineering function in Canada
D I G I T A L  E D I T I O N Linak U.S. Inc ........................................37
M.W. Fasteners ....................................34
March/April 2008
Master Bond Inc ..................................30
Nabtesco Precision USA Inc .................33
Omega Engineering ...............................2
Please go online to dpncanada.com to fully explore and enjoy
Ontario Drive & Gear Ltd .....................17
the Digital Edition of Design Product News. This user-friendly
Miniature IR transmitters
Oriental Motor USA Corp .....................17
Omega has annonunecedw the fOoS10r0mE seraiest , with every item linked to other websites, videos
of miniature infrared transmitters measure Pamensky Canada Inc ..........................14
a temperature raangen ofd -18 º3 toD 538 ºPC. FDea-Fs, will help you get even more invaluable design
tures include adjustable emissivity, field- PennEngineering ..................................35
adjustable alarme onutpgut, iannde RSe-23r2i nPCg information from DPN.
interface. Available analog outputs include Pepperl + Fuchs ...................................15
4 to 20 mA, 0/5 Vdc, 0/10 Vdc, 1 mV/º,
and Type K thermocouple. Pivot Point Inc ......................................27
omega.ca Info Card 340 PTC Inc .................................................21
DPN editor
PTDA ....................................................38
Mike Edwards
Ringball Corporation ............................36
Interactive stuff SEW Eurodrive .....................................31
Notice that as you move your mouse over certain parts of the magazine or over Siemens PLM Software ........................19
the DPN 3D and video player buttons, in some editorial stories and in some SKF Canada Ltd ....................................14
▼
advertisements, a grey box appears. That means you are one click away from a Smalley Steel Ring ...............................28
Microstep motor drivers
new window opening up that takes you to a website or rich media we’ve linked to. SolidWorks .............................................9
Oriental Motor USA Corp. has announced
an RBK 2-phase bipolar stepping motor Spirol International Corp ......................27
and drive package that features dc input
and a variety of control functions. The THK Canada ...........................................8
smooth drive function divides the basic 1.8º
stepD anglie ugp toi 1t28a µstelps ine 16 sdelectiabtle ion sponsored by: Tolomatic .............................................13
resolutions.
orientalmotor.com Info Card 341 ▼ Trans-Quip Inc ......................................18
Wago Corporation................................13
Motion feedback

Power entry modules gets touch and feel
Interpower Corp. has introduced a line
of three-function IEC 60320 power entry
modules. The module ratings are 6 A/250
Vac for North America and 10 A/250 Vac
for international applications. Features in-
clude a fuse holder to accommodate one
5 x 20 mm fuse and a voltage selector to By Mike Edwards Haptics is a technology that allows human inter-
choose between 110 and 220 V input. faces, such as joysticks, to provide force feedback
interpower.com Info Card 342 MARKHAM, ON – What if a neurosur- cues to operators performing the procedure from a
geon could calibrate the sensitivity of his distance, making them feel physically connected to
Volume 35 Number 6 instrument so that hand tremors could be the remote system. Haptic technology even allows
filtered out? What if a crane operator in a seaport for precision robotic tools to act like a surgeon’s
could unload giant shipping containers much faster arms, hands and fingers.
and with a miniscule pendulum effect on loads? Previous haptic interfaces, developed over the
What if a recovering stroke patient could do phys- years, have limited or non-driven degrees of free-
iotherapy at home to regain coordination, strength dom (DOF). Quanser’s 5- and 6-DOF haptic inter-
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PAP Registration No. 10773 Continued on page 8
DPN Nov_07.indd 1 11/12/07 10:20:16 AM
March/April 2008 ddppnnccaannaaddaa..ccoomm DDeessiiggnn PPrroodduucctt NNeewwss 55
Renderings
Better 3D printing price points and materials
making rapid prototyping more attractive
By Mike Edwards, Editor “The popularity of 3D printers is driv- according to the report. includes 50 co-authors from around the
ing the growth of the industry,” said Terry The report reveals that an estimated world, including Canadians Vesna Cota
Wohlers, principal author of Wohlers Re- 77.4% of the 3D printers sold in 2006 of Tyco Electronics and Millan Yeung of
As little as 10 years ago, owning a port 2007 and president of Wohlers Asso- came from Stratasys and Z Corp. Additive the National Research Council, 56 ser-
piece of rapid prototyping (RP) ciates. He defines 3D printers as the low- systems from these two companies have vice providers, and 29 system manufac-
equipment was beyond the reach cost variations of additive systems that are been the most popular in recent years and turers assisted with the development of
of most small and medium sized busi- office friendly, easier to use and less expen- have led much of the industry’s growth. the report.
nesses. The hulking units tended to start sive to operate. According to Wohlers, rapid manufac-
at $500,000 and go up to the stratosphere “3D printing grew from nothing to turing – the direct production of finished
from there. nearly 15% of the installed base in its first goods from additive fabrication – is the
In the past couple of years, however, four years,” Wohlers added. 3D printers next frontier. Wohlers Associates believes
RP machines have morphed in more ways sold over the past four years (2003–2006) that rapid manufacturing will eventually
If you found renderings interesting, please send
than one. First, the additive process tech- represent 68% of the total number of ad- grow to become the largest application of
a message to [email protected].
nology (as opposed to subtractive CNC ditive systems installed during this period, additive fabrication. The 220-page report
machine tools) has become to be known as
3D printing. The term is a natural progres-
sion from the ubiquitous 3D solid model-
ing CAD software programs that design
engineers have on their desktops.
Secondly, the price and size: 3D print-
ers can cost less than $20,000 now and fit
next to your laser printer in your office.
You can spend much more, of course. It
all depends on the features that make the
most sense for your design development
workflow.
rapid prototyping
Yesterday was Today is
report features
complicated and MPScalc
Canadian input
time consuming
Do you want full color output? Proto-
planning
types in minutes or hours? An engineered
material that can survive rigorous testing
in the field? Or would you like multiple or
blended engineered materials contained in
the same model?
The “rapid” term in this environment
lives on in the terms rapid manufacturing
and rapid tooling. Rapid manufacturing
denotes the process methodology of going
from 3D CAD model to production part
in rapid succession, while rapid tooling
(RT) denotes the process of translating
the model in software into a 3D mold that
is constructed in same way as a physical
RP part.
But whether your goal is to quickly pro-
duce test parts or tooling, there are many
service bureaus (in Canada, too) that rent
Planning and Implementation of Production Systems: Surprisingly Easy
the services of their RP and RT equipment,
whether you choose to walk in the door or
upload your part designs to a secure server (cid:44)(cid:69)(cid:65)(cid:78)(cid:228)(cid:77)(cid:65)(cid:78)(cid:85)(cid:70)(cid:65)(cid:67)(cid:84)(cid:85)(cid:82)(cid:73)(cid:78)(cid:71)(cid:228)(cid:82)(cid:69)(cid:76)(cid:73)(cid:69)(cid:83)(cid:228)(cid:79)(cid:78)(cid:228)(cid:73)(cid:78)(cid:84)(cid:69)(cid:76)(cid:76)(cid:73)(cid:71)(cid:69)(cid:78)(cid:84)(cid:76)(cid:89)(cid:228)(cid:68)(cid:69)(cid:83)(cid:73)(cid:71)(cid:78)(cid:69)(cid:68)(cid:228)(cid:87)(cid:79)(cid:82)(cid:75)(cid:83)(cid:84)(cid:65)(cid:84)(cid:73)(cid:79)(cid:78)(cid:83)(cid:228)(cid:65)(cid:78)(cid:68)(cid:228)(cid:77)(cid:65)(cid:84)(cid:69)(cid:82)(cid:73)(cid:65)(cid:76)(cid:228)(cid:83)(cid:85)(cid:80)(cid:80)(cid:76)(cid:89)
online. They should also provide design
(cid:83)(cid:89)(cid:83)(cid:84)(cid:69)(cid:77)(cid:83)(cid:14)(cid:55)(cid:73)(cid:84)(cid:72)(cid:228)(cid:45)(cid:48)(cid:51)(cid:67)(cid:65)(cid:76)(cid:67)(cid:12)(cid:228)(cid:82)(cid:69)(cid:65)(cid:67)(cid:72)(cid:228)(cid:89)(cid:79)(cid:85)(cid:82)(cid:228)(cid:68)(cid:69)(cid:83)(cid:73)(cid:82)(cid:69)(cid:68)(cid:228)(cid:67)(cid:79)(cid:78)(cid:70)(cid:73)(cid:71)(cid:85)(cid:82)(cid:65)(cid:84)(cid:73)(cid:79)(cid:78)(cid:228)(cid:80)(cid:82)(cid:69)(cid:67)(cid:73)(cid:83)(cid:69)(cid:76)(cid:89)(cid:12)(cid:228)(cid:70)(cid:76)(cid:69)(cid:88)(cid:73)(cid:66)(cid:76)(cid:89)(cid:228)(cid:65)(cid:78)(cid:68)(cid:228)(cid:81)(cid:85)(cid:73)(cid:67)(cid:75)(cid:76)(cid:89)(cid:14)
support that can assist in keeping the ul-
timate cost/part economical, ensure that (cid:55)(cid:73)(cid:84)(cid:72)(cid:228)(cid:65)(cid:76)(cid:76)(cid:228)(cid:84)(cid:72)(cid:69)(cid:228)(cid:66)(cid:69)(cid:78)(cid:69)(cid:70)(cid:73)(cid:84)(cid:83)(cid:228)(cid:84)(cid:72)(cid:65)(cid:84)(cid:228)(cid:67)(cid:79)(cid:77)(cid:69)(cid:228)(cid:70)(cid:82)(cid:79)(cid:77)(cid:228)(cid:85)(cid:83)(cid:73)(cid:78)(cid:71)(cid:228)(cid:80)(cid:82)(cid:79)(cid:86)(cid:69)(cid:78)(cid:228)(cid:50)(cid:69)(cid:88)(cid:82)(cid:79)(cid:84)(cid:72)(cid:228)(cid:87)(cid:79)(cid:82)(cid:75)(cid:83)(cid:84)(cid:65)(cid:84)(cid:73)(cid:79)(cid:78)(cid:228)(cid:80)(cid:82)(cid:79)(cid:68)(cid:85)(cid:67)(cid:84)(cid:83)(cid:14)
your design is manufacturable and offer (cid:34)(cid:79)(cid:83)(cid:67)(cid:72)(cid:228)(cid:50)(cid:69)(cid:88)(cid:82)(cid:79)(cid:84)(cid:72)(cid:14)(cid:228)The Drive & Control Company
form/fit/function suggestions.
One of the best clearing houses for rap-
id manufacturing information is Wohlers
Associates (wohlers.com).
The consulting firm has released its lat-
est findings in Wohlers Report 2007, an in-
depth global study on the state of the 3D
Bosch Rexroth Canada
printing, additive fabrication and rapid
490 Prince Charles Drive South (cid:132) Welland, ON (cid:132) L3B 5X7 (cid:132) Phone: [phone]
manufacturing industry. Wohlers Associ-
ates has been tracking the developments For more information on MPScalc, go to www.boschrexroth.ca
and trends in additive fabrication, also and enter the webcode CA0006
known as rapid prototyping, since 1988.
According to the report, average unit (ma-
Electric Drives Linear Motion and
chine) sales growth, compounded annu- and Controls Hydraulics Assembly Technologies Pneumatics Service
ally, was 37.4% over the past 18 years.
Annual unit sales have grown by more
than 26 times – 157 units to 4165 – from
1993 to 2006.
Untitled-4 1 2/20/08 11:25:43 AM
6 Design Product News dpncanada.com March/April 2008
By Design
Phoenix Contact celebrates 25th
anniversary with expansion plans
By Mike edwards manufacturers’ representatives, system in-
MISSISSAUGA, ON – Phoenix Contact tegrators and direct sales personnel.
Ltd. is celebrating 25 years in Canada. “It is great to see our continued growth
Established in 1983 with 4 employees, in Canada, even in our 25th year of opera-
Phoenix Contact tion,” said Andreas
in Canada has Sobotta, director of
now grown to sales and marketing
over 50 employees of Phoenix Contact
and will be look- Canada. “At Phoenix
ing to the future by Contact we consis-
moving into a new tently deliver exciting
location by early new products to our
2009. customers, providing
After the move, superior support and
greg Marsh (left), VP of operations, Designfusion, Yanick genest, Patrick Dumont, Huu-Phuong Doan, and Kevin
the Canadian mar- service.” Johnstone, president, Designfusion. The company now has offices from winnipeg to Quebec City.
ket will continue to The company has
be supported with also announced the Designfusion acquires Mobius
Architect’s rendering of the future Phoenix Contact
local technical and appointment of Gary
Canada headquarters in Milton, on. insets: Andreas
commercial ser- sobotta (left) and gary Martins. Martins to national
Technologies to extend reach
vice, sales, logistics sales manager. With
and marketing. Some of the features of the 13 years of sales experience, over 10
new 2125 m2 building will feature an air- years with Phoenix Contact, Martins is
conditioned warehouse bathed in natural credited with building highly successful, TORONTO – The boards of Design- Designfusion is now a national VAR
light, large visitor centre to house training service oriented sales teams in Ontario, fusion and Mobius Technologies have covering Canada from its offices in To-
for 50, and will conform to new gold level Quebec and Atlantic Canada and looks announced the merger of the two com- ronto, Winnipeg, Ottawa, Montreal and
energy efficiency design standards put out forward to further supporting the highly panies under the Designfusion name Quebec City. It has recently announced
by the Ontario Government. competent sales personnel and agents lo- (designfusion.ca). The merger further plans to open offices in Alberta to ensure
The company also provides a national cated west of the Ontario-Manitoba pro- cements Designfusion’s position as the strong local presence in the major manu-
sales network comprised of distributors, vincial line. largest Siemens PLM Software dedicated facturing centres.
value added reseller in North America. “In Siemens PLM we have the tech-
Designfusion and Mobius Technologies nology leader in its field and as an or-
Center of excellence for alpha gear drives will continue to operate out of their exist- ganization we decided that we needed
ing offices and will be providing support to take the same position. This merger
across Canada in both official languages. significantly strengthens our leadership
Servo motion control components and systems supplier
“With this acquisition we immediately in the Canadian market and will show
alpha gear drives, inc. (alphagear.com) has announced
double the number of customers we have immediate benefits to our customers,”
the opening of a North American Global Center of
in Quebec which in turn allows us to ex- said Greg Marsh, VP of Operations for
Excellence in Waterdown, ON. The company is a manu-
tend our service offerings. This is part of Designfusion.
facturer of inline planetary gear reducers, servo right-
our ongoing commitment to deliver the Founded five years ago by Kevin John-
angle gear reducers, elevator drives, systems and software.
highest quality service and support to stone and Greg Marsh, Designfusion has
Engineering and sales support staff based at alpha &
our customers in both official languag- quickly established a level of consultative
WITTENSTEIN’s North American headquarters in Bartlett,
es.” said Kevin Johnstone, president of support which has enabled it to grow to
IL, will continue to be available to provide sales support,
Designfusion. over 700 Canadian customers.
technical assistance and motion control training.
new sKF Canada president
News in
The SKF Group has announced João Ricciarelli has
Brief been appointed president of SKF Canada Ltd. (skf.
ca). Ricciarelli (left) has held various executive man-
agement responsibilities within SKF, most recently in
solidworks adds partner Europe being responsible for Key Account Manage-
ment and Reliability Systems sales growth. His back-
Elmo Solutions (elmosolutions.com)
ground includes Executive Level Strategic Growth
has announced that Agni Link, its live,
responsibilities, Key Account Management and Reli-
bid irectional CAD-ERP data integra-
ability Systems Division responsibilities.
tion system for Microsoft Dynamics sKF Canada president João ricciarelli.
NAV, Dynamics AX and Dynamics
GP, has been awarded “Solution Part-
Thomas & Betts Canada executive appointment
ner Product” status by the SolidWorks sandra Pupatello (left), Minister of economic
Development and Trade, at the announcement
Partner Program. Thomas & Betts Canada (tnb-canada.com) has announced the appoint-
of the Automotive Centre of excellence at the
ment of Pascale Daviau (right) as director, Business Development and
university of ontario institute of Technology.
Test tools donation Product Innovation. Daviau will work closely with product engineering,
Fluke Electronics Canada has an- technical documentation and technical liaison to direct the new product $120 million general Motors
nounced it will be donating over development and execution process, in order to ensure the timely intro-
Automotive Centre of
$23,000 worth of advanced digital duction of innovative new products and services that bring added value
multimeters to schools for students in to T&B customers, end-users and specifiers. T&B makes of electrical excellence launched at uoiT
Industrial and Electronics programs components for construction, industrial and utility markets.
through a grant application program OSHAWA, ON – The establishment of
(flukecanada.ca). National Factory Automation Show, presented a new General Motors of Canada Auto-
Calendar
by the SME (smecanada.ca/montreal). motive Centre of Excellence at the Uni-
Modeling consortium versity of Ontario Institute of Technol-
March 26-27, 2008. Toronto. Advanced May 13-14, 2008. Burlington, ON. IndraDrive ogy (uoit.ca) was announced last month.
Maplesoft (maplesoft.com) has an-
Manufacturing Expo, including the Assembly Single Axis Servo training from Bosch Rexroth With more than $120 million in contri-
nounced the founding of the Physical
Canada and Canadian High Technology Shows, Canada (boschrexroth.ca/training). butions from General Motors of Canada
Modeling Consortium, a forum in
presented by the Society of Manufacturing and the PACE partnership, the Govern-
which organizations, including Toy-
Engineers (smecanada.ca/assembly). May 29-31, 2008. Whistler, BC. PTDA ment of Ontario and the Government
ota, can share ideas and advance the
Canadian Conference presented by the of Canada, the centre will be the hub
development of Rapid Plant Modeling
May 12-14, 2008. Montreal. Montreal Power Transmission Distributors Association of the broader Automotive Innovation
methodology based on symbolic com-
Manufacturing Technology Show, including the (ptda.org). Network of automotive engineers, auto
putation.
suppliers and Canadian universities.
See more events @ dpncanada.com
HOW AUTODESK INVENTOR
3
TAKES YOU BEYOND D DESIGN.
Autodesk® Inventor™ software is more than just 3D, it’s
the foundation for digital prototyping. It gives you the power
to create a complete digital model, allowing you to test
and validate real-world performance – all before ever building
a physical prototype. Learn more at autodesk.com/inventor
Autodesk, Autodesk Inventor, and Inventor are registered trademarks or trademarks of Autodesk, Inc., in the USA and/or other countries. All other brand names, product names, or trademarks belong to their respective
holders. Autodesk reserves the right to alter product offerings and specifi cations at any time without notice, and is not responsible for typographical or graphical errors that may appear in this document.
© 2007 Autodesk, Inc. All rights reserved.
Autodesk_DPN_Sept07.indd 1 8/22/07 11:01:42 AM
8 Design Product News dpncanada.com March/April 2008
Cover Story
Automated bakery oven includes
unique heat recirculating system
wide variety of products that IHB bakes.” the LC Bakery has
From Front Page
Loaves are introduced to the oven on been very responsive
self-loading unit. Product from IHB is dis- traditional wooden peel boards along a to his company’s
tributed by major supermarket retailers. manually-fed roller conveyor. The boards needs to automate his
Casasanta said the automated unit “can are then tilted slightly by a pneumatic baking process and
produce the same volume of breads in one cylinder array so the loaves can be gen- remain competitive
hour that used to take 2-1/2 hours with tly picked up by a rotating stainless steel in an era when the
one operator instead of six.” He explained mesh loader mechanism to draw the goods trend is away from
that the oven has 28 gas burners and pro- toward the oven mouth. The loader then Ma and Pa bakeries,
rising heat in the oven (roof above) is recirculated back
cess valves that provide 12 zones of con- gradually places the loaves onto a 90-ft and more towards
to conserve energy and maintain constant tempera-
trol – 9 at the bottom and 3 at the top. stone conveyor belt that runs the length of the “big box” store model for production.
tures. The design was modeled in software by LC Bakery
“The control zones provide for very flex- the oven through all of the heat zones. “At an early stage, LC Bakery was able to gain an insight into possible flow outcomes before
ible temperature profiles that address the Dennis Rossetti, president of IHB, said to look at the design and engineering of the first sheet metal was bent for manufacturing.
the oven equipment that would preserve
the artisan baking process. Stock pieces of
equipment from other suppliers wouldn’t
allow for the added engineering we re-
quired,” said Rossetti. “You can’t make a
Volkswagen on a Ford production line.”
Besides Rockwell PLCs providing pro-
grammable zone heating control for differ-
ent types of bread, IHB has benefited from
the servo-actuated automatic loading of
multiple loaves instead of individual hand-
loading, solving the problem of finger in-
dentations affecting the finished look of
certain breads. As required, the loader can
also flip loaves before they enter the oven.
Casasanta noted that the stone elements
on the oven’s internal conveyor, made in
Italy to 0.25 mm tolerance, provide a ra-
diant heat that emulates traditional ovens
and creates a uniformly baked product.
Energy efficiency is integral to Casasan-
ta’s design. The air/gas combustion burn-
ers on the top of the oven only supplement
the heat provided from the bottom burn-
ers, while a cross-flow convection effect is
maintained via recirculation return ducts.
Using SolidWorks mechanical CAD
software (solidworks.com), Casasanta was
able to model his entire new oven design
before going into production. “I was able
to perform interference detection, ensure all
the bolt holes lined up and know the final
oven design was completely accurate,” said
Casasanta. FlowWorks from CosmosWorks
analysis software allowed Casasanta to
know what to expect from the heat circula-
tion inside the oven, he added.
Since maintenance is a key consider-
Our Type GL-N Actuator
ation, LC Bakery wanted safety for the
combines advanced engineering with oven operators, according to Russ Sobo-
lewski, technical sales representative, Fes-
the unique benefits of Caged Technology.
to Inc. (festo.ca). Festo components were
integrated into the oven’s loader assembly
What do you get when you cross leading engineering design. “When the loader servos are in
with dual Caged Technology? The unparalleled perform- the maintenance position, two pneumatic
ance of the Type GL-N. stopper cylinders provide a locking de-
vice,” Sobolewski said.
• Four-way equal load rating
To help keep the noise down in the bak-
• Speeds up to 200% faster than conventional types ery, valve terminal technology with surface
• QZ Lubricator option for maintenance-free operation mounted silencers from Festo controls
• Options include covers, bellows, double-acting cylinders that tilt the peel
boards prior to the oven loading process.
sensors and more
Although Casasanta designed in a va-
• Increased load capacities
riety of Festo components such as valves,
To learn more, give us a
• Smooth and precise movement
cylinders, proximity switches and trans-
call at 905-820-7800 or
• Ball screw- and belt-driven models mitter/receiver optical sensors, he would
THK Manufacturing Facility
visit www.thk.com. • Made in the U.S.A. for quick delivery Hebron, Ohio like to incorporate more of them into his
next version of the oven.
In addition to ovens, LC Bakery makes
proofers, flour silos and custom racking. “We
still do service, and certainly our service-ori-
entated business foundations have been ben-
eficial to understanding mechanical mainte-
nance and to incorporating that knowledge
in our designs,” concluded Casasanta.
Untitled-16 1 2/21/08 3:44:07 PM
March/April 2008 dpncanada.com Design Product News 9
Feature: Power Transmission
Torque arm assists shaft mounted speed reducers
By Todd Bobak ing for the torque arm, the pivot point of Provided that it will fit within the design
the torque arm should run along, or paral- constraints of your application, you may
lel to, the line of action. The line of action opt to use a turnbuckle for a torque arm.
In the power transmission industry, is defined as the right angle formed by a A turnbuckle is a device commonly used
shaft mounted speed reducers provide line joining the pivot point and the center to tighten a rod or rope. Its components
one possible solution to meet the speed of the SMSR’s output bore. include a sleeve with screwed connections
reduction/power generation needs for an In essence, the connection method at the of opposite hands (left and right) at each
application. As the name implies, a Shaft pivot point you chose (i.e., bolt, threaded end. Upon turning the sleeve, the connected
Mounted Speed Reducer (also known rod, etc.) must be able to withstand this parts (threaded rods) will be drawn together,
more simply as SMSR) is a speed reducer calculated force when in tension. If you taking up slack and producing tension.
mounted directly onto, and statically sup- find that the calculated force exceeds the Todd Bobak is Product Engineer, Sumi-
ported by, a driven shaft – that may be physical limits of the connection method, tomo Machinery Corp. of America. This
found on a conveyor. Typically, the SMSR you may choose to incorporate a differ- article was excerpted from his White Paper,
incorporates a hollow bore (keyed, taper- ent, stronger material for the torque arm. “Torque Arm Design Considerations for
A torque arm is mounted to the sumitomo Cyclo Helical
grip bushing, etc.) to facilitate mounting Another way to minimize this force is to Shaft Mounted Speed Reducers.”
Buddybox. The designer needs to evaluate the effects of
onto the driven shaft. increase the distance of the pivot point. www.smcyclo.com the resultant forces acting on the torque arm.
When an SMSR is mounted directly
onto a driven shaft with no other external
support, it must have a torque arm attached
to it. A torque arm is a pivoted connecting
link between the reducer and a fixed anchor
point intended to resist the torque developed
by the reducer. Quite simply, a torque arm
transmits the reaction torque produced by
real power
the SMSR into the structure of the machine,
thereby preventing the counter-rotation of
an SMSR during operation.
Counter-rotation
prevention the key
consideration
In considering the design of a torque
arm, first you need to understand the
amount of load (or force) that the torque
arm may see during unit operation. To
determine this force, you need two pieces
of critical information:
1. The torque capacity of the SMSR: As
the name implies, this is the mechanical
capacity (typically expressed in terms in.
lb or Nm) that the SMSR is capable of
developing at its output. While it may be
tempting to simply multiply the MOTOR
output torque by the reducer’s reduction
ratio to obtain an output torque value, it is
recommended to consider (at a minimum)
the larger of the following values:
• the SMSR’s output torque capacity (as
listed in the product catalog) or,
• the product of the motor’s output torque
and reduction ratio times an additional
2.5 – to take into account the motor’s
starting torque.
2. The dimensional location on the SMSR
where the torque arm will be mounted:
Manufacturers of shaft mounted speed
reducers provide at least one mounting
location for a torque arm. Note that the
point where the torque arm attaches to
the reducer (either directly or indirectly
through a bracket) is known as the pivot
point. Many manufacturers provide more
than one potential location for the torque
IF YOU’RE NO SANDCASTLE SCULPTOR, USE SOLIDWORKS.
arm in order to accommodate the various
mounting configurations available for a
given product. The location(s) of these
You don’t need to be a sculptor to create impressive designs in 3D. The powerful direct editing
mounting holes/positions may be found in
capabilities of SolidWorks® (SWIFT™) simplify and automate the design process for your team.
catalog cut sheets or through manufactur-
So you can create compelling products that separate you from your competitors.
er-supplied product drawings.
It is important to note that during oper- Skip Barber Racing School LLC uses SolidWorks 3D CAD software to improve racecar
ation the SMSR will tend to rotate about performance, while cutting design time by approximately 80 percent.
the driven shaft in the direction opposite
to that of the driven shaft’s rotation. With
this in mind, it is significant that the cal-
culated force acts in pure tension on the
torque arm. This fact is especially impor-
tant for torque arms that are long in length
Learn about the advantages of SolidWorks at www.solidworks.com/sand
because, if they are exposed to compressive
forces, they may buckle.
DESIGN BETTER PRODUCTS
In order to maintain pure tension load- SolidWorks is a registered trademark and SWIFT is a trademark of SolidWorks Corporation. ©2007 Dassault Systèmes. All rights reserved.
Untitled-2 1 1/2/08 9:54:08 AM
10 Design Product News dpncanada.com March/April 2008
Feature: Power Transmission
Linear guide primer asks
designers: ”round or square?”
By Robert Lipsett Square rails are available with preloads
that can be specified from light (3% of Load capacity for a similar
the rated dynamic load) to heavy (13% size square rail linear guide
Design engineers considering linear of the rated dynamic load). The classic can be 3 or more times that
of a round ball bushing
guides often struggle with which application for profile rail bearings is in
when both are taken at a
basic shape to choose: round or the machine tool industry where load
100 km travel life. round
square. Which is right for your applica- capacity, stiffness and accuracy are para- shafting can position loads
tion? mount. to within thousandths of
Profile rail products are well suited With load capacity, stiffness and accu- an inch where square can
achieve ten-thousandths of
for high load applications (in the range racy all going for profile rail, some engi-
an inch (micron accuracy).
of ~20 kN for a 25 mm size is typical) neers are tempted to look no further.
that require good stiffness (on the order However, this can result in poor system
of 1 to 4 μm/kN for a 13% preload, for performance and increased up front and
example), and high accuracy of 3 to 10 service costs. run smoothly when mounted to less than Ball bushing linear bearings can adapt
μm/m when running parallelism between Round rail products can offer several perfect surfaces – those with a flatness to a variety of conditions due to their self-
the bearing guide and rail. advantages, one of which is the ability to error of over 150 μm/m. aligning capability. Because the shaft is
round, ball bushings are free to rotate in roll
around their axis. This allows one rail to be
installed at a slightly different elevation than
the other, with height differences of 1 or 2
mm often being acceptable when rails are
installed 300 mm or more apart. Also, most
ball bushings enable each linear bearing to
rotate up to ½ a degree in pitch and yaw to
accommodate flatness or alignment errors.
Another significant benefit of round
rail products is their circular profile, which
allows the shaft to be end supported. This
enables round linear bearing designs to
span gaps of 12 to 24x the shaft diameter.
The square rail solution to the prob-
lem of alignment is to simply use one
rail. Because they can support move-
ments in all directions, profile rail bear-
ings do not need to be used in rail pairs
or even bearing pairs. For light loads, a
Alignment with the
drive mechanism must
still be accounted for
single profile rail bearing can provide the
desired guidance (note that not all profile
rail products are designed for this type of
operation), which eliminates the problem
of aligning two rails on divergent sur-
faces. However, alignment with the drive
mechanism must still be accounted for,
and profile rails are not designed to span
gaps or be end supported.
Design flexibility can be an important
consideration in the choice of components.
To achieve optimum performance, com-
ponents are often modified to enhance
function or fit the available space. Profile
rail bearings are more compact than round
ball bushing bearings when load ratings
are compared. So if the geometry supports
the system needs, you will have a fairly
optimized package. However, if modifica-
tions are necessary, it is generally easier to
make those on a round rail system.
In some applications smoothness is
a major consideration. Although specif-
ics can vary between components and
applications, ball bushing bearings tend to
operate very smoothly and typically run
with slight clearance or light preload of 1
to 2% of the rated dynamic load, which
also promotes smooth operation.
One last consideration for round rail
installations is that one can also run non-
ball type polymer bushings on the shafts.
Robert Lipsett is Engineering Manager,
Danaher Motion, in Wood Dale, IL.
www.DanaherMotion.com
Untitled-3 1 2/21/08 10:05:44 AM