CNCMill - Revision history

RobertBushman at 06:11, 4 August 2022

2022-08-04T06:11:30Z

← Older revision		Revision as of 06:11, 4 August 2022
Line 151:		Line 151:

	[[File:Mesh check.png\|thumb]]		[[File:Mesh check.png\|thumb]]

			= Geometry =

			== Circle from 3 Points ==

			https://stackoverflow.com/questions/4103405/what-is-the-algorithm-for-finding-the-center-of-a-circle-from-three-points#4103418

			<pre>
			public static Circle circleFromPoints(final Point p1, final Point p2, final Point p3)
			{
			final double offset = Math.pow(p2.x,2) + Math.pow(p2.y,2);
			final double bc = ( Math.pow(p1.x,2) + Math.pow(p1.y,2) - offset )/2.0;
			final double cd = (offset - Math.pow(p3.x, 2) - Math.pow(p3.y, 2))/2.0;
			final double det = (p1.x - p2.x) * (p2.y - p3.y) - (p2.x - p3.x)* (p1.y - p2.y);

			if (Math.abs(det) < TOL) { throw new IllegalArgumentException("Yeah, lazy."); }

			final double idet = 1/det;

			final double centerx = (bc * (p2.y - p3.y) - cd * (p1.y - p2.y)) * idet;
			final double centery = (cd * (p1.x - p2.x) - bc * (p2.x - p3.x)) * idet;
			final double radius =
			Math.sqrt( Math.pow(p2.x - centerx,2) + Math.pow(p2.y-centery,2));

			return new Circle(new Point(centerx,centery),radius);
			}
			</pre>

2022-07-28T00:39:54Z

Gear Cutting

← Older revision		Revision as of 00:39, 28 July 2022
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	= Gear Cutting =		= Gear Cutting =

			== G-Code ==

			[[GearCuttingVersionOne]]

			== Notes ==

	* On a 30mm radius gear, error from 1 degree involute curve approximation is on the order of thousandths of a millimeter.		* On a 30mm radius gear, error from 1 degree involute curve approximation is on the order of thousandths of a millimeter.

2022-07-28T00:39:19Z

Bearing Cup

2022-07-27T19:02:10Z

Links

← Older revision		Revision as of 19:02, 27 July 2022
Line 16:		Line 16:
	***** Roughing: 10% to 50% of tool diameter		***** Roughing: 10% to 50% of tool diameter
	***** Finishing (bottom): 3% - 5% of tool diameter		***** Finishing (bottom): 3% - 5% of tool diameter
	* Speeds ~~& Feeds~~		* Feeds & Speeds
	** https://www.the-carbide-end-mill-store.com/Feeds-and-Speeds.html		** https://www.the-carbide-end-mill-store.com/Feeds-and-Speeds.html
			** [[Feeds_and_Speeds]]

	= G-Code =		= G-Code =

2022-07-27T18:53:31Z

Links

← Older revision		Revision as of 18:53, 27 July 2022
Line 16:		Line 16:
	***** Roughing: 10% to 50% of tool diameter		***** Roughing: 10% to 50% of tool diameter
	***** Finishing (bottom): 3% - 5% of tool diameter		***** Finishing (bottom): 3% - 5% of tool diameter
			* Speeds & Feeds
			** https://www.the-carbide-end-mill-store.com/Feeds-and-Speeds.html

	= G-Code =		= G-Code =

2022-07-25T05:46:37Z

Mesh Check

2022-07-25T05:45:19Z

Gear Cutting

← Older revision		Revision as of 05:45, 25 July 2022
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	* https://khkgears.net/new/gear_knowledge/abcs_of_gears-b/gear_profile_shift.html		* https://khkgears.net/new/gear_knowledge/abcs_of_gears-b/gear_profile_shift.html
	* http://www-mdp.eng.cam.ac.uk/web/library/enginfo/textbooks_dvd_only/DAN/gears/generation/generation.html		* http://www-mdp.eng.cam.ac.uk/web/library/enginfo/textbooks_dvd_only/DAN/gears/generation/generation.html

			== Mesh Check ==

			Looks promising:

			[[File:Mesh check.png\|frame]]

2022-07-25T05:02:58Z

Gear Cutting

← Older revision		Revision as of 05:02, 25 July 2022
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	** "Calculation of the minimum number of teeth"		** "Calculation of the minimum number of teeth"
	* 14 teeth minumum (17 hypothetical, 14 practical, some stretch to 12)		* 14 teeth minumum (17 hypothetical, 14 practical, some stretch to 12)

			== Profile Shifted ==

			* z=10, x=.4 pretty safe
			* z=8, x=.4 probably works in practice
			* https://khkgears.net/new/gear_knowledge/abcs_of_gears-b/gear_profile_shift.html
			* http://www-mdp.eng.cam.ac.uk/web/library/enginfo/textbooks_dvd_only/DAN/gears/generation/generation.html

2022-07-25T04:45:24Z

Gear Cutting

← Older revision		Revision as of 04:45, 25 July 2022
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	* http://www.otvinta.com/gear.html		* http://www.otvinta.com/gear.html
	** http://www.otvinta.com/tutorial01.html		** http://www.otvinta.com/tutorial01.html
			** Also: cnc-mill/involute_gear/calculator/Otvinta.com -- Involute Gear Calculator

	== Not Profile-Shifted ==		== Not Profile-Shifted ==

2022-07-25T04:43:02Z

Gear Cutting

← Older revision		Revision as of 04:43, 25 July 2022
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	* 20 degrees is the typical pressure angle.		* 20 degrees is the typical pressure angle.
	* http://www.otvinta.com/gear.html		* http://www.otvinta.com/gear.html
			** http://www.otvinta.com/tutorial01.html

	== Not Profile-Shifted ==		== Not Profile-Shifted ==