Not quite 10 cm... Bliesma drivers require small holes, so this makes the baffle look bigger and thicker than it actually is.
The MT baffle is 55 mm thick. My Baltic birch plywood was 18.3 mm, so I ran the cherry boards through the thickness planer to 18.3 mm to match.
Here are the layers of the MT baffle before glue up. The outer most layer is solid cherry. The inner layers have solid wood on the outer edges, with birch ply at the core. The solid wood was arranged so that the grain direction alternated with each layer.
Here is the three layers during the glue up process. I used West Systems epoxy for this step. I knew that I would not be able to maintain perfect alignment, so I oversized each panel and machined to final size later on using a table saw.
It takes 72 hours for the epoxy to fully cure. In the past I have made the mistake of cutting/sanding epoxy layups after just 24 hours, and although the epoxy feels hard to the touch, it softens under the heat of power tools. It gums up sandpaper and saw blades and does not machine well.
After the panel was trimmed to final size, I cut the compound bevels. I talked about this earlier in the thread
j.
The MT baffle is 55 mm thick. My Baltic birch plywood was 18.3 mm, so I ran the cherry boards through the thickness planer to 18.3 mm to match.
Here are the layers of the MT baffle before glue up. The outer most layer is solid cherry. The inner layers have solid wood on the outer edges, with birch ply at the core. The solid wood was arranged so that the grain direction alternated with each layer.
Here is the three layers during the glue up process. I used West Systems epoxy for this step. I knew that I would not be able to maintain perfect alignment, so I oversized each panel and machined to final size later on using a table saw.
It takes 72 hours for the epoxy to fully cure. In the past I have made the mistake of cutting/sanding epoxy layups after just 24 hours, and although the epoxy feels hard to the touch, it softens under the heat of power tools. It gums up sandpaper and saw blades and does not machine well.
After the panel was trimmed to final size, I cut the compound bevels. I talked about this earlier in the thread
j.
It depends on the brand and ambient temperature. With West System epoxy (with 205 hardener) I could usually resume work after a day, but with cheaper stuff from some online marine supplies store it was indeed 2-3 days at higher ambient temperatures before I could do anything with it.