CAD Templates and Pattern Sanding Test
With the new bandsaw tuned up and cutting nicely I got to work designing the templates needed to make the chairs. I worked through the steps to make each part, designing pattern routing/sanding templates to aid each step. Each part has several templates to be used to route the shape, mortises, etc.
I ended up with 46 templates overall, a lot more than I expected. I sent the files off to the local CNC shop for quoting.
While waiting for my templates I decided to test out my pattern sanding rub collar using a template for the back seat rail.
Starting with a sapele scrap, I traced a portion of the full size pattern and headed to the bandsaw.
After rough cutting just outside the line, I attached the template to the part with double sided tape. The rub collar requires an offset of 1/4", which I designed into each CNC template. For this test, I just used the full size template and set it back about 1/4". After a little time at the sander, I had a finished part that matched the template exactly.
Satisfied that my pattern sanding technique will work, I placed an order for a load of quarter sawn Sapele. Working in AutoCAD, I determined that I could get all of the components for a chair from a single 8/4 board as long as it is at least 9" wide and 10' long. This required a special order from my hardwood supplier, who agreed to bring in some wood for me to pick through.
Next Steps: Pick up the sapele when it arrives and get my CNC templates on order.
I expect you are right. They had no trouble working from the AutoCAD files I supplied last time for the table. I imagine this will be the same.I d be interested what the quote is for templates at a CNC shop. Pretty reasonable I would bet, so long as your program is compatible with theirs.
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