LORTONE FL15 (01) PDF Document

The LORTONE FL15 series of vibrating laps is used for flat polishing of slabs, geodes, bookends and clock faces. The oscillating action produces a smoother, flatter surface than can be obtained by hand polishing.

Durable Cast Aluminum Grinding Pan.

Separate Cast Polish Pan to Reduce Contamination.

Rugged Welded Steel Frame.

Long-Life Oversized Bearings.

Check to make sure you have the following parts:

(1) Lap Frame

(1) Powerhead Assembly with motor

(1) Polish Pan with pad

(1) Grind pan

(1) Accessory Package containing:

(3) Rubber Lap Balls

(3) Springs

(3) Thumb Screw

(3) Elevator Bolt

(3) Rubber Foot

(1) Operators Manual

(1) Warranty Card

Read the following instructions before assembly or use of your machine. Failure to follow instructions could result in damage to the machine or injury to operator.

1. Slip the rubber feet over the elevator leg bolts.

2. Screw the elevator leg bolts into the bottom of the machine.

3. Adjust the leg bolts until the machine is level.

IMPORTANT: An unlevel machine will cause the grit, water and slabs to move to one side.

4. Tighten the nuts to hold the elevator leg bolts in place.

1. Place the rubber balls on the cups as shown.

2. Set the pan assembly on top of the can assembly.

3. Carefully lift the edge of the pan assembly and attach the lap springs to the hooks as shown.

Caution: Do not overstretch the springs.

4. Replace the pan assembly and make sure each ball is in its cup.

1. Place the lap pan on the pan assembly as shown.

2. Securely tighten the thumb screws to hold the pan in place.

CAUTION: Do not operate without pan fastened securely to machine. Injury to operator or damage to machine may occur.

Proper preparation is important to reduce the amount of time required and to ensure a good finish. Initial flatness of the material determines the length of time required for polishing. Saw marks will greatly increase the time required for grinding. All pieces should have the rough edges and protrusions removed by hand grinding if necessary. Typical grinding time is 4-6 hours per step but varies considerably with variations in rock hardness and initial flatness of the surface.

Use only graded grits. Broad graded grits and grits coarser than 220 may reduce grinding times but will greatly increase the risk of under-cutting on softer material and will cause excessive pan wear. We suggest the following:

1. Place 4 tablespoons of 220 grit in the grinding pan and add just enough water until a thin mixture is obtained. Caution: Too much water will cause excessive splash.

2. Turn the machine on and place the rocks face down on the grit. If grinding multiple pieces, use rubber bands or plastic rings to prevent the edges from hitting each other. Short pieces of plastic drain pipe or sections of old garden hose joined in a circle work well.

3. Add water occasionally to prevent mixture from drying out. Do not leave unattended while grinding.

4. Grind until the material shows a continuous, even surface finish.

1. Clean the pan, rocks and rings well to remove all grit.

IMPORTANT: Any grit remaining will contaminate the next step and dramatically affect the final results. Thorough cleaning is critical.

2. Place 4 tablespoons of 600 grit in the grinding pan and add just enough water until a thin mixture is obtained.

3. Continue grinding to remove the finish from the 1st step until the entire surface shows a continuous, smooth finish.

1. Clean the pan, rocks and rings well to remove all grit.

CAUTION: Any grit remaining will contaminate the polish pad and require its replacement.

2. Remove the lap pan and install the polish pan. Securely tighten the thumb screws to hold the pan in place.

3. Place 4-5 tablespoons of Tin Oxide on the polish pad and add just enough water until a thin mixture is obtained. Caution: Too much water will cause splashing and foaming.

To decrease the processing time, change the grit after 2 hours.

Do Not just add more grit as this will slow the process.

Thin slabs must be weighted to ensure proper operation. Lead weights or other rocks may be attached directly to the slabs with dop wax, double-sided waterproof tape, or other means.

Most difficulties in polishing result from contamination. Cleanliness between steps and in handling cannot be stressed enough. Clean all rocks, equipment, measuring scoops and hands prior to the polish stage.

The first step is the most critical. Hold the slabs up to the light to check the finish. It should be the same across the entire surface. Grind until the material shows a continuous, even surface finish. Spend the time to make sure the first step is done right and the final steps will be much easier.