The safest method of grooving is to perform the down-cutting (clockwise) in the direction of the arrow in the direction of the four arrows in the schematic. After completing the four areas, complete the setting of the whole body in a counterclockwise direction. The edge groove, so that the edging knife does not have the problem of pulling out the burr when passing through the previously slashed area. If necessary, after grooving with the engraving machine, the trowel can be used to trim the uneven portion of the rim groove.
Many years ago, most of the handmade piano makers used the hand-held engraving machine to complete the operations, and most of the studios now use the engraving machine workbench - from heavy industrial equipment to small workbench. Used. The work of opening the edging groove on the engraving machine table is actually much better than the hand-held engraving machine.
Use a caliper to carefully set the depth of the engraving machine, and then find a piece of scrap to check the trimmed groove and the side strip you intend to use. When the long fiber is cut radially to cut the body of the wood, it is easy to pull out the burr. For example, when the guitar body is flanged, the four areas marked by the arrows in the lower diagram are easier to pull out of the burr. Therefore, the four areas should be chamfered first, that is, the engraving machine is pulled in the direction of the wood by the cutter head. When viewed from the front of the body, the engraving machine moves clockwise. This will try to avoid the wood being pulled out of the burr.
If you want to slot a curved body such as a mandolin or a curved guitar, using the engraving machine table is the best solution for small studios. Apply a wooden ring of appropriate height to the cutter hole with double-sided tape to raise the body to a suitable height and keep the side of the body perpendicular to the table. The shaft is clamped around the body with a smooth axial clip to stabilize the body at an appropriate height. The position of the clip can be changed when the shaft clip interferes with the edging knife.
The cutter head of the engraving machine fixed under the workbench is used to pry the surface of the workbench from a hole in the workbench, and the side of the body that needs to be grooved is moved toward the workbench. The method of avoiding burrs is the same as when the hand-held engraving machine is operated, and because the engraving machine is fixed and you can move the body with a much lighter weight with both hands, the flexibility of the body control is much better.
