However, if we reduce the size to be w/in what the selected endmill can cut we get the desired result:
Attached:
star_redrawn_redux.c2d (173.4 KB)
William: That’s why you are the expert and I am the novice. I changed that and it cut the time down quite a bit. One last question (I hope), I set the V-Cut to feed rate of 90, plunge rate at 30, and pass depth to .4 and I am wondering if I am pushing things or not or what you would recommend.
What material are you cutting with the V endmill?
Did you try the file:
?
(at this time no one has downloaded it — should cut a bit more crisply than the 3D modeled ball-nose version)
William: No I have not tried it. My workshop temperature is in the teens so I am doing more planning than making. Your file looks much better than mine. I will be working in wood. I note you use tool 251 a 1/4 inch end mill with 2 flutes. I don’t have that tool, but I do have the 250 a 1/4 inch end mill with 3 flutes. Make any difference?
Never heard of the #250 — do you mean #201? If so, the 201 is up-cut and leaves a jagged edge at the top, the #251 is down-cut.
Hi, is there a listing of what the different end mills are somewhere? 201 vs 251 vs 320 vs 322 vs 324 are all listed as 1/4" with no further information. Thanks.
There’s:
and the specific shop page descriptions, which for the Carbide 3D tooling are linked to from the entries in Carbide Create.
You are correct. I did mean the 201. My bad! Sorry. I have a 3 flute down cut end mill and am guessing it could be substituted for the 2 flute?
Yes, with a suitable adjustment for the chip load.
CC641 (now in beta) adds a Circular Array command which makes this a bit more straight-forward:
Draw a triangle:
Select it and choose “Circular Array”:
set the number of items to 5 and either type in the numbers for the center or press the button “Select Center in Window” and then click in the window to indicate the desired centerpoint:
OK
While the immediate impulse is to just draw the entire star at once:
this results in a self-intersecting geometry which isn’t a good way to draw things — instead, draw parts of the star using a few points at a time so that they overlap:
Then select them all:
and Boolean Union:
arriving at:
4 Likes