RECEIVING
Remove the lathe from the shipping container and check for damage. Report any damage to your distributor immediately. Accessories are packaged in a separate carton which will be on the shelf of the machine stand. Clean protective coating from the bed, spindles, work rest and face plate with kerosene or a good commercial solvent. Read the instruction manual thoroughly for assembly, maintenance, operation and safety instructions.
INSTALLATION
Install the four leveling screws in the legs, adjust to a stable, level position and tighten the jam nuts to lock in place.
Insert the guard support rod in the guard mounting bracket at the rear of the headstock. Position a locking collar on each side of the mounting bracket so that the lock pin lines up with the holes in the guard pivot rod, one for guard position and one for load position. The spring loaded lock pin will hold the guard in each position.
Power Connection
The lathe will operate on single phase or three phase 230 volt power supply. A three wire pigtail for use on 230 volt single phase power is attached to the inverter and may be hard wired to the power source or connected to a receptacle plug. Connect the 230 volt supply to the black and white leads and ground the green lead.
If three phase power is used, it will be necessary to replace the pigtail wire with a 12/4 wire and connect the three hot leads to the inverter at R, S and T as shown in the wiring diagram. Always connect the ground lead.
Before connecting to the power source make sure the on/off switch is in the off position and turn the speed dial counterclockwise. If the switch is in the on position when the power is connected, the inverter will trip out. If this happens, disconnect power, turn switch off, wait 30 seconds and then reconnect power.
NOTICE: IF THERE IS A POWER OUTAGE WHILE OPERATING THE LATHE, TURN THE SWITCH TO THE OFF POSITION, DISCONNECT POWER SOURCE, WAIT 30 SECONDS THEN RECONNECT POWER SOURCE AND RESUME NORMAL OPERATION.
Inverter Drive System
The model 3520A lathe utilizes the latest technology in A.C. inverter drives to provide infinitely 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 ramp that eliminates the shock of normal across the line starting. Also a braking feature eliminates long coasting periods when the lathe is turned off.
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
MAINTENANCE
Maintenance on the 3520A lathe should be performed at periodic intervals to insure that the machine is in proper working order, that all fasteners are tight, and the machine is in adjustment. The more use the machine is subjected to, the more often it should be inspected and maintained. Inspection and maintenance should be performed at least twice a year.
WARNING: To prevent accidental starting or electrical shock, disconnect machine from power source before performing any maintenance.
Periodic cleaning of the lathe is important to keep the lathe in proper working order. The lathe bed should be cleaned and oiled periodically so that headstock, tailstock, and tool support will slide properly. With air hose periodically blow out headstock to keep saw dust and chips from collecting on belt and sheaves, and blow off dust and chips that collect on inverter (DO
NOT DISASSEMBLE INVERTER TO CLEAN).
ADJUSTMENTS
Belt Adjustment
The drive belt sheaves are initally aligned at the factory, but if any service is performed that affects their alignment it is very important that they be realigned. To realign them, loosen the two set screws on the spindle sheave and slide it in the proper position. Use of a straight edge along the edge of both sheaves will simplify the positioning. When properly aligned, there should be no pulsing sounds or noise coming from the belt.
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