19
The arrow showing the rotating direction and the number showing the stroke length are engraved at the
side of the constant velocity cam. Make sure that the arrow direction of the constant velocity cam is
same as the rotating direction of the worm wheel shaft. After assembling the drive unit, operate the
motor and compare with the diaphragm speed.(Normal if forward speed is faster than backward speed)
※
If the assembly direction (rotating direction) of the constant velocity cam is opposite, you cannot obtain the
pulse rate as desired; besides, the product may be damaged, so always pay attention to the direction.
Assembly
As the motor has rotating direction, the constant velocity cam has direction, too. Build the constant
velocity cam with consideration of the rotating direction of the worm wheel shaft as shown in below figure.
Gear cover
Bearing
Velocity cam
Worm wheel shaft
Rotion direction when driving
Velocity cam
Slider set
Gear box flange
Diaphragm
Gear box
Rotation direction
of motor
180
。
Phase difference
(180
。
Rotating accembly)
Rotation
direction
Rotation
direction
Stroke length
Stroke length
PKD-500, 121, 241, 521, 102
Gear cover
Bearing
Rotation direction when driving
(PKD-212,412,702,143)
Gear box flange
Diaphragm
Rotation direction
of motor
Gear box flange
Gear box
Slider set
Worm wheel
Velocity cam
Rotation
direction
Stroke length
6
Slider set
PKD-212, 412, 702, 143
