Engraving granite slabs and inserts, often distinguished by their big size and mass, calls for using special accessories. Combining accessories for engraving granite slabs with a flatbed laser stone engraving machine dramatically facilitates and speeds up the process, and hence, the specialists in any engraving shop should use such accessories and know well how to work with them.

The following material deals with the special features of working with accessories used for engraving granite slabs and inserts.

Engraving granite inserts

If you want to use a laser stone engraving machine only for engraving 0-30 mm thick granite inserts, which do not exceed the internal size of the machine frame, the laser stone engraving machine should be placed on a table with a flat top as shown in the following (Fig. 1). The machine should be fastened to the tabletop. The lower part of the machine frame has special fastening holes for this. The granite slab (insert) is placed on the tabletop surface, and then the laser machine performs engraving.

Note that the slab need not be fastened on the table. If you want to engrave inserts with a thickness exceeding 30 mm, lift the machine above the tabletop surface.

 

 

Fig. 1 Engraving a slab on the table

 

Engraving granite slabs

As a rule, engraving granite slabs requires rolling up the slab into the engraving work area. The thickness of the slab to be engraved can be arbitrary (both small slabs 10-mm thick and those over 50-mm thick).

Different variants of rolling up the slab and roll-up carriages are used.

Engraving granite slabs requires that the flatbed laser stone engraving machine be installed on legs to provide space for moving granite slabs to the engraving area. The leg design can be any, whereas the key requirement is their stability. Legs can be welded of angle pieces or pipe sections.

Fig. 2 shows an example of legs.

 

Fig. 2.1 System for engraving heavy slabs (roll-up carriage)

The roll-up carriage can be of any type (on wheels, Fig. 6, and on rollers, Fig. 5), though the most convenient option is a carriage on rollers with an elevating table, Fig. 5.

The roller roll-up carriage is installed on guides (rails), which can be made of angle pieces or pipe sections. An example of a roll-up system with a roller carriage is shown in Fig. 3.

 

Fig. 3 System for slab roll-up to the engraving area:

1 – roller roll-up carriage, 2 – guides, 3- legs.

Such a system of roller carriage roll-up on guides ensures accurate slab delivery to the engraving area (Fig. 4), though sometimes usual wheel roll-up carriages are used (Fig. 6).

Fig. 5 Roller roll-up carriage: 1 – carriage frame, 2 – wheel (pulley roller), 3 – table elevation and inclination adjustment screw, 4 – table rubber mat, 5 – movable table.

Fig. 6 Hydraulic roll-up carriage on wheels

When installing the slab in the engraving area, it is important to ensure slab parallelism relative to the frame of the laser granite engraver. Check parallelism by moving the engraving head to the extreme four points of the slab and measuring the gap between the engraving head and the slab surface. Availability of adjustment of the elevation and inclination angle of the carriage table facilitates the process of adjusting slab parallelism and installing it in the machine for engraving monuments. Such adjustment is done by turning one of the table surface adjustment screws or by placing spacers.

Hence, when you use a laser stone engraver to engrave big slabs, an important criterion is ease of installing the slab in the engraving area. You can choose any scheme and method for stone roll-up, which you will find convenient!