Show me how you make them. What tools do you use? I have a laser engraver, but it is not powerful enough to cut.
Just gonna have to make one of them.I select the centering ring material, then plot out my circle with a compass.
At the center, I drill a 1/4 " hole.
The blank is then rough cut on a band saw.
The blank then spins on my circle sanding jig.
After the OD is correct, I then use a hole saw that's approximately the diameter that I want for the ID.
Final inside diameter is massaged with a dremel and hand sanding.
Takes longer to talk about it than it does to do it.
https://www.rocketryforum.com/threads/i-made-a-tool-today.162195/
Show me how you make them. What tools do you use? I have a laser engraver, but it is not powerful enough to cut.
flybar cutter. and a a drill press (firmly anchored!)
get two (or three, or ...) and cut away! Set them each for a specific diameter. Do the center hole first, then cut the other. paint eh end white or orange. it hurts a lot when you forget that bit hanging out as it spins!
https://www.amazon.ca/General-Tools...ocphy=1002615&hvtargid=pla-384684125741&psc=1
Show me how you make them. What tools do you use? I have a laser engraver, but it is not powerful enough to cut.
flybar cutter. and a a drill press (firmly anchored!)
get two (or three, or ...) and cut away! Set them each for a specific diameter. Do the center hole first, then cut the other. paint eh end white or orange. it hurts a lot when you forget that bit hanging out as it spins!
https://www.amazon.ca/General-Tools...ocphy=1002615&hvtargid=pla-384684125741&psc=1
Do you reverse the point? The picture on amazon shows it cutting a slant inward.
Yeah, flip it to whatever side you want to be perpendicular. Again, why I say get to or three or.. (the one I linked to is w-a-a-a-y expensive. "Amazon: the new Ebay!") They can be a pain to get adjusted for the right dia. but once dialed in, crank it down, and leave it! I paid around $9 or $12 for mine at the local reno shop
Also you can adjust the height of the cutting tip, so that the centering bit has more "meat" to center itself on. I also tend to screw my board to a thicker piece of backing
not unreasonably priced, and once I got the hang of the software, a piece of cake to make the file. I have ordered a set for another rocket. I used Ponoko.com
View attachment 436207
Waste Not... Want Not...what else do you do with slightly warped fins?!? Warped enough for fins, not for CRs..)
View attachment 436238
So several passes is common on laser cutting? My set up also will take a bit.David-as per your question about laser cutting CR's the one pictured in my post above I did on a makelab 90 watt lasercutter. It can cut 0.25 inch plywood with 2 passes. The CNC CR's pictured I did on an Inventible's X-carve (also at the make lab). Fiberglass cutting is easily done by CNC with the appropriate bit, but not by laser cutting. CF is also manageable by CNC but no on a laser. You can cut acrylamide (1/4 inch) by laser with a few passes and in certain layouts can simulate fiber glass (e.g. altimeter sleds).
Regards,
Fred
.......... I used a circle cutter (or "fly cutter"), but almost killed myself with it.
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