Devices mounted to lift trucks to help manage inventory have been around 20-plus years and have only improved with age. Computers on-board lift trucks to measure the activity of the vehicle, however, are a relatively new phenomena that offer great potential.
The ability for a
computer to relieve
managers of paper-work, particularly in regard to government regulations, is one of the principal aspects of the Crown Equipment
Corporation (New Bremen, Ohio,
www.crown.com) wireless fleet management system known as InfoLink.
"To comply with OSHA," explains
Matt Ranly, senior products manager,
"regulations state that every time a
truck is turned on, the operator must
fill out a pre-use inspection sheet. There's no way to confirm if they actually do
the inspection, or simply complete the paperwork."
And when that paperwork is completed it must be collected, stored and
data entered into a computer. This
new wireless fleet management system
can relieve operators and managers of
the paperwork burden. When an operator turns the key, the InfoLink terminal cycles through all the inspection
requirements and the data is automatically stored.
"Another
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benefit," says Ranly, "is
that the system tracks the certification
of every driver and every truck he is certified to operate." It also notes the date
of the operator's certification and the
truck will not operate (when the operator puts in his identification code) if
the certification has expired.
Logging the bumps
Impact sensors now tell managers
much more than before. Trucks have
previously had sensors to measure impacts. Typically, the sensors would shut
the truck down on impact. A supervisor
was then required to restart the vehicle
and the operator was reprimanded.
Improvements in electronics have
changed that.
Now, with InfoLink, the force of an
impact that is important to managers
will be logged, yet the truck does not
necessarily shut down. Whereas a consistent small impact might be common
to a specific operation, a larger impact
can tell the manager a lot about the
operator as well as the truck. Time and
place stamping in the data tell the
manager exactly what happened,
when and where.
"Culling through the data," says
Ranly, "you begin to see behavioral
driving habits of operators. When confronted with facts, drivers often admit
to having an accident. Now, with InfoLink, operators have been known to
go directly to their supervisor right after the incident occurred."
Financial repercussions are many
from collecting this type of information. Damage to trucks as will as racks
and products can be reduced, even
eliminated.
Another benefit of recording lift
truck information real time is that managers have an accurate report on usage.
Often maintenance is scheduled by
looking at a calendar instead of actual
running time of the vehicle. Without
accurate usage data, trucks can be over
serviced or under serviced. "Also, by
looking at travel time of the vehicle and
comparing lift/lower time," says Ranly,
"the manger can see if the operator is
being productive."
Optimizing a lift-truck fleet is also
easier with on-board computer monitoring because real-time data is used to
determine how many trucks are actually needed in a particular time frame.
Reports accurately describe running
time and lift/drop activity, telling the
managers exactly how each truck is being used. By shifting resources, even
eliminating some vehicles, costs can be
reduced.
Working by remote control
Another on-board product offered
by a lift truck manufacturer, Hoist
Liftruck Manufacturing (Bedford
Park, Ill, www.hoistlift.com) is RemoteTech, a vehicle management system the company is incorporating into
its new trucks. This system allows managers, or the truck manufacturer, to do
diagnostics on the vehicle, real-time,
remotely if necessary.
Design engineer Jeff Svec says, currently they are monitoring various aspects such as engine speed, transmission shift points and the functions of
the hydraulics on vehicles. The system also employs impact sensors to
monitor potential damage to the vehicle. "We've also installed a cell modem on board so that we can do diagnostics sitting here [in Cleveland or
Chicago] while the truck is anyplace in the world."
An example of that was a recent reprogramming effort he did via the telephone and an Internet hook up. Tom
Murray of HiLo Yale Industrial Trucks
(Hauppauge, N.Y., www.hilousa.com),
took delivery of a truck for a customer.
Between the time when the truck was
shipped from the factory and when it
was delivered, the customer changed
his mind about the controls on the pendant that would be used. While sitting
on the truck with his cell phone, and a
laptop computer plugged into the vehicle, Murray and Svec reprogrammed
the pendant operating device on the vehicle within 90 minutes. "It was all done
over the Internet to change the function buttons on the pendant as if it had
been done at the factory," says Murray.
He says he had another customer
that changed its mind on the function,
or control of the fork tines. "They
wanted the controls to move the tines to
tilt instead of swing. So, using the Internet, we were able to take one function
out of the truck and put another in."
An important part of the RemoteTech system is its ability to notify
managers, or others, when preset faults
have been activated. "The truck's system is tied in to our [Hoist Liftruck]
computers," explains Svec. "If something goes wrong, or faults exceed a
pre-set limit, an e-mail is sent to the
manager or any assigned party."
Because all of the data on every vehicle is gathered into the Hoistlift computers, Svec can review faults reported
via the sensors to determine if a single
truck has a problem or if there is something bigger happening with all the
trucks.
"For example," he says, "if we see an
abnormal volume of hydraulic filters
being changed at intervals we had not
predicted, we can talk to the filter vendor, or review the specifications for the
filter we have on that line of trucks."
From the manufacturer's point of
view, the impetus behind this type of data gathering is to be able to insure
continuous improvement of the product. It also lets the manufacturer determine if the customer has the right vehicle for the assigned application. "If
we're seeing a lot of overload faults,"
says Svec, "we can ask if a larger truck is
needed, or if we need to make some
adaptation to the vehicle."
Having the ability to monitor and
program the vehicle remotely also adds
flexibility to the truck, he says. "If the
customer's requirements or needs
change, within limits we can adapt to
that change at a greatly reduced cost to
the customer."
Svec says future enhancements to
the system will be a larger, more interactive display for the operator. Currently the system uses warning lights
similar to those on an automobile.
Also, the new display will allow technicians to make adjustments via the display terminal rather than plugging into
a laptop.
Controlling inventory
Inventory control in a $1.4 billion
company is critical. You can do it with
index cards or the most sophisticated
electronics and warehouse management systems available. Mike Figiel, systems engineer, Berry Plastics (Chicago,
www.berryplastics.com) says it saw the
benefits of automatic data collection
and opted to install RF terminals on its
lift trucks 10 years ago. How you select
the right equipment is as critical now as
it was then.
"Even when you move into the electronic realm of inventory control," says
Figiel, "you still need to allow the operators the ability of interacting with the
inventory system."
Warehouse operators, whether using a manual system or automatic data
collection, are a source of information
he says. "Early on, we began writing
controls for a previous system that was
rules based," he explains. "It was
A+B=C. However, on the floor of the real world, A+B didn't always equal C." There were errors
in the real-world environment and then operators were
stalled, or locked out of jobs because they had no way of
putting information into the system.
"We made the error of designing the application so
that it would exclusively drive the functionality at the
floor level," he says.
The intimate knowledge and intelligence of the operator is still needed on the floor, even with sophisticated
warehouse management systems. "We changed our
thinking process to say we are going to enhance the ability of the operator and give him the right tools to work
with the product," says Figiel.
That was the guiding principle for the company's recent upgrade to new VX6 model terminals from LXE (Atlanta, www.lxe.com). "We've seen evolution over the years
to include more ruggedized equipment," he says, "however, we've also seen some challenges in the size of the terminals that mount in the truck cab as people wanted
more information at the operator level."
Operators objected to larger terminal screens that
blocked their visibility, for one thing. Finding terminals
that fit the cab and are large enough to deliver all the necessary information for order picking and putaway became
the challenge for Figiel. He says the burden for him in
choosing equipment is nothing when compared to the
burden of the operator who will be using the equipment.
After the IT department had made its choices, terminals
were tested and rated by the operators to find the best fit.
The choice came down to half-height screens with
back-lit keys on the keyboard. "The half-height is large
enough for the information we want to deliver," he says.
"It provides good communication between the operator
and the host system."
Figiel says the guiding influence in selecting terminals
was, and should be: How does it enhance the operator's
ability to do the job? "The scanning function of the device
is most critical," he says, "then finding a data terminal that
interfaces with that scanner."
Another piece of advice Figiel gives is that the terminal
should be flexible in its mounting on the truck, particularly if the company has a mixed fleet of vehicles. "It used
to be," he says, "the terminal came with the mount from
the manufacturer and that was that. Now flexible ram
mounts are available to fit the terminal to the truck and
operator."

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