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4 System Design
G5-series Linear Motors/Servo Drives With Built-in EtherCAT Communications
4-1 Installation Conditions
4
4-1-3 Ironless Linear Motor Installation Conditions
z Cooling of Motor Coil Unit
• The Motor Coil Unit becomes hot during operation. For the Motor Coil Unit, install a moving table
(radiator plate) of the recommended dimensions or larger to provide sufficient heat dissipation into
the air.
• To provide good heat dissipation, reduce the thermal resistance by applying thermal conductive
silicon between the Motor Coil Unit and the moving table.
• Provide adequate ventilation as required to prevent an excessive rise of the ambient temperature
because heat is dissipated in the air.
• If the rise of the ambient temperature must be suppressed for a certain application, or if the size of
the moving table is smaller, configure a separate cooling system to cool the Motor Coil Unit.
z Rigidity of Linear System
The response performance of a linear system is affected by the rigidity of the Linear Slider. Ensure
that the rigidity is appropriate for the required performance. If a gain is set to higher than the
machine rigidity, the vibration occurs.
Take the following measures to improve rigidity.
• Use preloaded linear guides. This makes the Linear Slider highly rigid with less play in the
mechanical system.
• Ensure the rigidity of the base material to which the Linear Slider is secured.
The materials in descending order of rigidity: granite, steel, and aluminum.
• The moving table must have a sufficient thickness to prevent deformation and vibration.
• Install the Magnet Track and external encoder in a straight and parallel line.
• Install the external encoder as close to the Motor Coil Unit as possible.
Motor Coil Unit model
Moving table (radiator plate) dimensions
R88L-EC-GW-03 254 × 120 × 12
R88L-EC-GW-05 330 × 120 × 12
R88L-EC-GW-07 460 × 180 × 12
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