Have you ever wondered how to laser engrave a bench? Garry Macfarlane from Freckle Furniture did. He received two commissions for benches with engraved pieces simultaneously! He asked us if we could help.
The bench in the picture was commissioned as a retirement gift. Colleagues wanted the logo of the fisheries organisation where they all worked together on the back top beam of the bench. For the front seat rail under the seat, they chose a Gaelic inscription – ‘Mur a bheil e agad, na cuir air tìr e’. Garry and I still don’t know what it means, so let me know if you do!
Designing the bench
There was no way that we could put the complete bench into the laser machine. It was far too large! When Garry was designing the bench, we discussed what dimensions of wood would fit into the machine when we were ready to engrave. Garry built the bench himself from oak. Before he assembled it, he brought the pieces to be engraved to my workshop.
Setting up the artwork
Garry supplied the blue and white SFO logo from the customer and he wanted it resized to 132mm. I usually ask for black and white artwork, but there was enough contrast between the blue and white shapes for the laser to detect which areas were to be to engraved.
I set up the Gaelic inscription. Text is easy to create once the customer has chosen the font and the size for engraving. Garry wanted a reasonably plain but classic font with something a little different, so we chose the Nyala font.
Size constraints and getting around them
The back top beam measured 1480 x 124 x 38mm and the front seat rail 1480 x 76 x 38mm. The maximum width we can fit into the machine is 1330mm, but as our machine has letterbox slits at the front and back, we can set up pieces with sections protruding through the front and back of the machine. That’s what we did with the bench pieces.
Engraving the bench
As all the wood sections would be lined up vertically in the machine, I set up the text and logo for engraving vertically too. Garry wanted the text and logo to be located centrally on each piece of wood. We identified the horizontal and vertical centres and made a small pencil mark that could be rubbed or engraved off.
When I positioned the wood in the machine, I set up the laser so that it was lined up over the pencil marks. Text length was kept within 800mm, the height of the machine bed, so that it could be engraved at one go. The text was easy to align as it was engraved on a rectangular section of wood.
But Garry had designed the back top rail into a curve with a point in the middle. This made things more interesting! We made a similar pencil mark to identify where he wanted the centre of the logo to be. Then I set up the wood in the machine in a similar way.
We did a nice heavy engrave for a good 3D effect. Having Garry there to give feedback during production meant that I could check each detail with him as we went along. He was delighted with the results, and returned to his workshop to finish and assemble the two benches.