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Installation Guide Linear Rotary Motors
independently of each other. However, if the application permits, it is recommended to execute the rotary
movement with the linear rotary shaft retracted, if possible. The rotary and linear movements should also be
carried out one after the other. This reduces the bearing loads and achieves a longer service life of the linear
rotary shaft.
By combining linear and rotary motion, highly complex motion patterns, such as those required in sealing
and assembly applications, can be easily realized using LinMot linear rotary motors. In addition to the two
motors, further options such as an air feed-through, a magnetic spring "MagSpring", a torque and a force
sensor as well as a pusher (electric or pneumatic telescopic movement) can be integrated in the housing.
3.3 Internal Mechanical Stops
Do not drive into the internal mechanical stops!
It must be ensured that the linear motor does not move to the lower or upper internal stop
during operation, as otherwise the linear motor may be damaged! The internal stops may
only be used for homing purposes. The homing speed must not exceed the value of 0.01
m/s.
3.4 Max. Speed
The mechanically maximum permissible speed of 1000 rpm must not be exceeded.
3.5 Option Load Compensation MagSpring®
The MagSpring option is a passive load compensation based on a magnetic spring with constant force over
the functional stroke range that can be integrated into the module. MagSprings are available in various force
levels and can either push or pull the linear rotary shaft. The MagSpring option can be used to compensate
the load mass. With the correct design, the motor current and thus its power loss can be reduced, by using a
MagSpring. This makes higher cycle rates possible.
If the MagSpring is sized properly, it can move the linear rotary shaft including the load mass into a collision-
free zone in the event of current loss.
•
Close to the stroke limit (idle state), the MagSpring has a reduced force to protect the
linear rotary motor from mechanical shocks in case of malfunction/control (self-
acceleration into mechanical stop).
•
If the maximum defined stroke (see data sheet) is exceeded, the MagSpring function
can no longer be guaranteed.
3.6 Option Hollow Shaft
Linear rotary motors can optionally be equipped with a pneumatic connection. This allows pneumatic
compressed air or vacuum to be fed directly through the linear rotary shaft. This avoids the complex passage
of hoses around the linear rotary shaft. This option can be used, for example, to control pneumatic grippers
or to pick up parts with the help of vacuum. For more information, see chapter 5.2 « Connecting the air ».
•
In the case of a vacuum application, it is recommended to use a unit with sufficient
power, as any air coupling points are known to produce minor losses.
•
Hollow shafts are not intended for the passage of liquid media.
3.7 Option Pusher (Pneumatic / Electric)
The optional pneumatic pusher (L05), which is technically a double-acting pneumatic cylinder, can be used
as a second independent linear movement. In the initial position, the pusher protrudes 20 mm above the
stroke turning shaft and achieves a total stroke of 25 mm. It generates a force of 300 N at 6 bar and can be
used, for example, to eject gripped elements or for the mechanical actuation of grippers. In addition to the
pneumatic version, LinMot also offers an electrically operated pusher (L15). This achieves the same total
stroke (25 mm) as its pneumatic counterpart and generates a force of 225 N. The electric pusher consists of
a second, fully integrated servo linear motor and can therefore not only move to freely selectable positions,
but also be operated with limited force. Mechanical grippers could thus also be partially opened or gripped
elements could be sensitively grasped with reduced force.
Page 8 / 41
PR02-70
ENG
NTI AG / LinMot
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