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| Brass/Alu engraving; getting my feet wet |
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| awemawson:
That's the picture Google found for me :ddb: |
| vtsteam:
Wow, that engraver is really cool! Just the type of thing I like. And the engravings (and patterns) are really well done. I'm not sure what scale those are and what speed and tool you are running. I've been running 1/8" solid carbide Amana bits at 6000 RPM in aluminum via CNC and they do a great job. But I'm not sure how well that would work on something you couldn't set a continuous feed rate for, like your engraver. Also maybe the tool is too large for your uses. Anyway, I'm really impressed with the simplicity of the rig and the quality of the results. :thumbup: :clap: |
| sorveltaja:
Thanks! The size of that Johnny Cash -master is 160x100mm(6,3 x 3,4"), while the engraved one is ~23x14mm(0,9 x 0,55"). So the ratio is ~7. Motor speed is about 4500 rpm at 24 volt. Cutting bit is made of 3,2mm(0,125") scrapped tungsten burr. This end is used for filling... ...and this end for finishing: Both ends have six faces, sharpened until there is no flat at the end. At first I considered of getting commercial bits, but they might be too delicate for manual operation. And the stylus: Tip is made of 1mm drill bit. 0,5mm would be even better for superfine details, but also much more fragile. |
| vtsteam:
Excellent! Homemade tooling, too! :thumbup: :thumbup: :beer: |
| nel2lar:
Vary nice and it's made from that brown stuff. Good looking work, looking for more. Nelson Collar :thumbup: |
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