MDS-E/EH Series Instruction Manual
1 Installation
8
IB-1501229-F
(2) Direct coupling - Rigid coupling
A rigid coupling has benefits such as high rigidity, and relatively lower price. However, shaft core deviation and
angle deviation of the motor shaft and ball screw are not allowed, so full attention is required in installing the rigid
coupling. Shaft core deviation is desired to be 0.01mm or less. If enough accuracy cannot be ensured, the motor
will have a broken shaft, or the bearing will have a shorter life.
Also note that the motor side ball screw bearing must be locked so that to avoid the thrust load on the motor shaft
due to expansion and contraction of the ball screw.
(3) Gear connection
Gear's accuracy and backlash amount greatly affect on the machine's
positioning accuracy and noise during operation.
Thus, according to the machine's specification, appropriately select the
accuracy and backlash amount.
In gear connection, it is required to take measures against oil to enter
the motor.
1.1.8 Oil / Water Standards
(1) The motor protective format uses the IP type, which complies with IEC Standard.
However, these Standards are short-term performance specifications. They do not guarantee continuous environmental
protection characteristics. Measures such as covers, etc., must be taken if there is any possibility that oil or water will fall
on the motor, and the motor will be constantly wet and permeated by water. Note that the motor's IP-type is not indicated
as corrosion-resistant.
Load side
Coupling
Motor side
0.01mm or less
Load side
Motor side
Example of gear connection with load
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