For me the list has been quiet but checking the forum web page there have been messages up to 23SEP2020. Not sure why I'm suddenly not receiving messages so I thought I'd try and post what I've been up to. John I needed a matrix to guide a razor blade to cut Silpad into 0.375" x 0.55" pieces. But how to repeatedly measure 0.55"? Machine something of course. Here's the end product in plywood. Did use metal engraving bit and metal mill. http://www.autoartisans.com/mill/SilPad/SilPadMatrix.jpg Start with an AlibreDrawing with lines for engraving. http://www.autoartisans.com/mill/SilPad/SilPadMatrixDrawing.jpg Then create the G-Code and get LinuxCNC, this time running on a Raspberry Pi4, to control the mill. http://www.autoartisans.com/mill/SilPad/SilPadMatrixLinuxCNC.jpg And away we go. http://www.autoartisans.com/mill/SilPad/SilPadMatrixEngraving.jpg The end result with a coat of shellac looks good but the lines are hard to see. http://www.autoartisans.com/mill/SilPad/SilPadMatrixShellaced.jpg So after a few more coats of shellac and some sanding I sprayed a blue coat. Then after it had a short while to dry a bit I used a paper towel with laquer thinner to wipe off the blue coating but leave the paint in the lines. Next step. Cut the silpad into the rectangles and that worked really well. cid:image003.jpg@01D69135.80AB1C00 John
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