Doosan Lathe LYNX 220B

Procedure : 1) Loosen the headstock clamping screws(M20, 5 pcs.).

• After loosening the adjusting screw(b), secure the adjusting screw(a). This shifts the headstock in the A direction.

• After loosening the adjusting screw(a), secure the adjusting screw(b). This shifts the headstock in the B direction.

• Carry out this adjustment while reading the dial indicator applied at the front end of the test piece.

c) After the required accuracy is obtained, tighten the 5 screws for headstock clamping. Note that reading of the dial indicator applied at the test piece top end must not change.;

Check the wipers for abnormalities such as damage

Check for oil leakage and for damaged piping

Check the Air unit element and if necessary, replace

Check the electrical components for dirt and discoloration and check for loose terminal screws

Check for loose connector/terminals between units

Arranging the machine periphery in order, cleaning the machine and its periphery (especially, the floor)

Checking the chuck unit and its periphery to scan for chips

Checking for secure mounting of the top jaws

Checking for smooth clamping/unclamping of chuck

Checking the tailstock spindle to scan for chips

Checking the tailstock body and tailstock spindle for smooth forward backward movement

Checking for secure mounting of the cutting tools and the holder

Checking the turrets and the cutting tools to scan for chips

Checking for unusual operating sounds during tail-stock or sub-spindle movement

1. Adjusting V-belt Between The Spindle and Main Motor

• When the PK-belts are worn or loosen after using for a long period, it is advisable to tension them or replace them with new ones.

Adjust the belt tension as below procedure

1) Loosen the fastening bolts (1) of motor bracket.

2) Loosen the nut (2) under the adjusting block.

3) Secure the adjusting bolt (3) slowly.

4) Check the amount of deflection value (d) of PK-belt with tension (F1) as above table.

5) After getting the set value (5), secure the nut (2).

2. Adjusting PK-belt between the sub-spindle

• The delivery amount to each lubrication point is controlled by the metering type distribution valve with automatic intermitent lubrication pump, and no further adjustment is necessary.

• A metering type distribution valves are provided at the machine rear(inside the cover) and at the right side of the tailstock. The delivery condition of lubricating oil can be checked visually. (Use sufficient care when checking the delivery condition.)

2) Maintenance and countermeasure.

When no lubricating oil is delivered :

a) Oil level is low. Replenish the lubricating oil of the same brand.

b) The pump is at a rest: The pump operates intermittently.

The pump operation interval is set at 5 minutes.

c) The oil strainer is clogged. Clean the oil strainer at least every six months. (See Fig. E-8.)