RIKON Power Tools 70-500 - Manual (Page 12)

Forward and Reverse Switch
Certain lathe operations require the use of a
reversable motor, such as outboard turning and
sanding.
To reverse the motor, make sure that the stop
button is pressed and that the motor comes to a
complete stop. For forward or normal motor
rotation, turn the switch (A-Fig. 25) to the right. To
reverese motor rotation, turn switch to the left.
Switching the motor to reverse while
motor is still running will cause the AC inverter to
fail.
Inverter Drive System
The model 70-500 lathe utilizes the latest technol-
ogy in A.C. inverter drive circuitry to provide infi-
nitely variable spindle speeds. The inverter controls
the speed of the motor by varing the frequency of
the voltage supplied to the motor. The inverter
provides an acceleration curve that eliminates the
shock of normal motor starting. Also a braking
feature eliminates long coasting periods when the
lathe is turned off. (Figure 26)
Warning:
Headstock
The headstock supports the main spindle assem-
bly and is rigidly fixed to the bed to ensure long
term accuracy and stability. The main spindle is
supported by 4 large precision bearings. They are
sealed for life and require no lubrication or adjust-
ment during their extended use. These bearings
are specially designed to run at high temperatures.
The main spindle is hollow to accept the knock out
bar for the removal of the drive center and other
accessories which are held in by the MT-2 taper.
Face plates and chucks should be screwed onto
the spindle and up against the hexagon face.
Excessive force is not required as it makes for
difficult removal. (Figure 27)
Fig.27
12
Caution: Never switch from forward/reverse
without completely stopping the motor.
Fig.25
A
Fig.26
The 2 HP motor is specially designed for use with inverter drives, and is balanced to reduce noise and
minimize vibration. The A.C. Inverter does not require any programming, it is pre-programmed from the
factory. The buttons on the face of the inverter should never be pushed at any time. Use only the
controls on the front of the switch box.