The customer is welding two 50 ft joist steel frames or rails
together. For the rails to be cut to their required 50 ft
lengths, they must first be fed through a push / roller system using a
rotary measuring wheel. This push system was incorrectly
measuring the 50 ft lengths and rails were not being cut
accurately. The customer was looking for a low cost design that
would feed the rail through and cut it at the correct length.
ROLLON designed a system which incorporated the use of their size 63
Compact rail and slider to carry the weight of the 50 ft
rail. A pulley and chain assembly, operated by a motor, moved the
rail. A positive stopper was mounted to the ROLLON slider and a
laser guided device measured the distance of the stopper. At 50
ft, a signal activates an electromagnetic brake on the motor, stopping
the system and guaranteeing a cut length of 50 ft.
A material vending manufacturer was designing a vending machine for
supplying tools. A solution was needed to automatically move the
gripper assembly to pick and issue tools on command. The gripper
was required to precisely move a maximum 20 Lb load horizontally and
vertically across the face of the machine at a moderate speed.
ROLLON designed a 2-axis gantry system using the A55 Uniline actuator
in the vertical position to carry the gripper assembly and two A40
Uniline actuators in the horizontal position to support the vertical
actuator. With ROLLON’s actuators having a repeatability of
positioning equal to 0.004” (0.1mm), there was no doubt the units
would be able to function in the vending machine. The light load
requirement also made it possible to use the smaller size actuators,
saving design space in the vending machine.
In a glass manufacturing plant, one process required transferring
the glass. A design was needed to accurately position several
rows of suction cups along the glass to grab and transfer the
glass. A problem existed in the transfer since it was necessary
to pivot and swing the entire gripping assembly and glass from a
horizontal postion to a vertical position and placing the glass on a
vertical rack. This pivot action created unknown extra moments
and forces on the gripper assembly.
Several ROLLON three-trolley size 75 Uniline actuators were installed
as part of the gripper assembly to mount the series of suction cups
used to pick and move the glass. Because of the pivot action
taking place during the process, a special modification was needed on
the actuators. ROLLON’s Easy Rail was incorporated into the
actuator in place of the standard Compact series rail. The Easy
Rails’ use of bearing balls in its design increased the load and
moment capacities of the actuators by appoximately five times, allowing
the actuators to handle the unknown loads and moments.
The US Army was developing a vehicle to transport as many wounded
personnel as possible at one time. They required a solution that
would be flexible while capable of handling the necessary weight.
Another concern is the design chosen must be able to support any extra
stresses created while the vehicle is moving.
ROLLON’s DE43 telescopic rails were used to mount the stretchers.
The rails extended outward during loading and unloading of the wounded
and retracted during transportation. This flexibility provided extra
space in the vehicle to allow up to 12 stretchers. The stroke was
reduced in the rails to give a higher load capacity and a higher safety
factor. When closed, the load capacity of the rails increased
almost 10 times its rating when fully extended, making it possible for
the rails to handle the extra forces created during
A yacht manufacturer was developing a wing station for both sides of
the yacht. The stations allow the pilot to dock the yacht
from the side of the ship where a clearer view of the yacht is
available. The stations consist of the controls for steering as
well as the platform for the pilot to stand. When needed, the
station would be extended out from the side of the ship and when
completed, the station would retract back into the side of the
yacht. A method was needed to move the station as well as support
ROLLON provided a two part solution to support the load and provide the
movement. ROLLON’s DSS Telescopic rails were designed in to
help carry the weight of the station while extended out from the
yacht. The rails were nickel plated and stainless bearing balls
were used to provide protection against the environment. The
ROLLON Uniline size 55 actuator was also used in the design to move the
platform. Use of the medium sized actuator was possible since all the
weight of the station would be supported by other rails, preventing any
load from being carried by the actuator.
A customer in the mobility industry was designing a new power transfer
seat which allows an individual to transfer from a wheelchair to a
driver’s or passenger’s seat in a vehicle. They were
searching for a linear telescopic system which can hold a total of 9000
Lbs, withstand crash forces while in the driving or closed position
while at the same time requiring little actuation force and low
ROLLON supplied ASN43
Telescopic rails to support the transfer seat. These rails
provided the necessary stroke the customer was looking for. Since
the stroke in one direction is half the length of the rail, the
load capacity is very high while allowing almost zero deflection.
When in the closed position, the load capacity greatly increases,
making the rails capable of withstanding the crash forces.
Because of its low friction, minimal force is required to move the
An amusement park attraction was designed to include a wheelchair
accessible platform. The platform is to move the wheelchair-bound
guest toward the vehicle to load t6he person onto the ride. A
maximum load is 500 Lbs and a total extension of 56” was
specified. A critical requirement was there could be no
deflection by the platform since the platform had to mount flush
against the floor of the ride so the wheelchair can roll smoothly onto
the ride without getting hung up.
Although ROLLON’s DE43 Telescopic
rail easily carried the load at the specified stroke, slight deflection
was encountered at the end of the platform. This forced ROLLON to
come up with a new and better solution. A DE63 Telescopic rail
was designed for the project. This larger rail provided not only
more load capacity along with its customary smooth movement, but
increased the stiffness in the extension of the rail. This extra
stiffness eliminated the deflection of the platform.