Weights - Revision history

Adamcolton at 22:02, 16 June 2016

2016-06-16T22:02:06Z

← Older revision		Revision as of 22:02, 16 June 2016
Line 77:		Line 77:

	Full set is supposed to be 28 days. For the bar, I'm assuming it will be much longer. But for the plates, I need to wait at least that long to paint them. Also, concrete should be kept wet for 5-7 days, so I'll need to go spray them down occasionally.		Full set is supposed to be 28 days. For the bar, I'm assuming it will be much longer. But for the plates, I need to wait at least that long to paint them. Also, concrete should be kept wet for 5-7 days, so I'll need to go spray them down occasionally.

			It's hard to get the weight just right and it's hard to get the plates round - so go over by just a little, then sand the plates round and to the correct weight.

	[[Category:In Progress]]		[[Category:In Progress]]

Adamcolton at 20:28, 5 November 2015

2015-11-05T20:28:11Z

← Older revision		Revision as of 20:28, 5 November 2015
Line 77:		Line 77:

	Full set is supposed to be 28 days. For the bar, I'm assuming it will be much longer. But for the plates, I need to wait at least that long to paint them. Also, concrete should be kept wet for 5-7 days, so I'll need to go spray them down occasionally.		Full set is supposed to be 28 days. For the bar, I'm assuming it will be much longer. But for the plates, I need to wait at least that long to paint them. Also, concrete should be kept wet for 5-7 days, so I'll need to go spray them down occasionally.

			[[Category:In Progress]]

Adamcolton: /* Build Log */

2015-11-04T21:06:07Z

Build Log

← Older revision		Revision as of 21:06, 4 November 2015
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	My first 1lb weight, well... Too watery. Should be 2T of water per lb of dry concrete. I set everything up to be watertight, and that's not really necessary or good. And in doing so left all sorts of depressions in the surface (I did smooth them out later). I'm going to take some scrap plywood and sand it out really smooth and paint it and mark down all the weight radius's. I can just work right on there and clean it between. I can use cardboard with a layer of duct tape around the outside. I'll also cut some scrap wood for imprints. My fingers are about a 1/2" wide, so I want a 1/4" gap about 2" deep around the outside of each plate. I want the weight pressed into each side. And the decorative spokes.		My first 1lb weight, well... Too watery. Should be 2T of water per lb of dry concrete. I set everything up to be watertight, and that's not really necessary or good. And in doing so left all sorts of depressions in the surface (I did smooth them out later). I'm going to take some scrap plywood and sand it out really smooth and paint it and mark down all the weight radius's. I can just work right on there and clean it between. I can use cardboard with a layer of duct tape around the outside. I'll also cut some scrap wood for imprints. My fingers are about a 1/2" wide, so I want a 1/4" gap about 2" deep around the outside of each plate. I want the weight pressed into each side. And the decorative spokes.

	Full set is supposed to be 28 days. For the bar, I'm assuming it will be much longer. But for the plates, I need to wait at least that long to paint them.		After getting everything set, put the wood up on some 2x4 chunks and put one of the power tools up against it to make the whole thing vibrate. That will help it settle.

			Full set is supposed to be 28 days. For the bar, I'm assuming it will be much longer. But for the plates, I need to wait at least that long to paint them. Also, concrete should be kept wet for 5-7 days, so I'll need to go spray them down occasionally.

Adamcolton: /* Build Log */

2015-11-04T20:59:13Z

Build Log

← Older revision		Revision as of 20:59, 4 November 2015
Line 73:		Line 73:

	My first 1lb weight, well... Too watery. Should be 2T of water per lb of dry concrete. I set everything up to be watertight, and that's not really necessary or good. And in doing so left all sorts of depressions in the surface (I did smooth them out later). I'm going to take some scrap plywood and sand it out really smooth and paint it and mark down all the weight radius's. I can just work right on there and clean it between. I can use cardboard with a layer of duct tape around the outside. I'll also cut some scrap wood for imprints. My fingers are about a 1/2" wide, so I want a 1/4" gap about 2" deep around the outside of each plate. I want the weight pressed into each side. And the decorative spokes.		My first 1lb weight, well... Too watery. Should be 2T of water per lb of dry concrete. I set everything up to be watertight, and that's not really necessary or good. And in doing so left all sorts of depressions in the surface (I did smooth them out later). I'm going to take some scrap plywood and sand it out really smooth and paint it and mark down all the weight radius's. I can just work right on there and clean it between. I can use cardboard with a layer of duct tape around the outside. I'll also cut some scrap wood for imprints. My fingers are about a 1/2" wide, so I want a 1/4" gap about 2" deep around the outside of each plate. I want the weight pressed into each side. And the decorative spokes.

			Full set is supposed to be 28 days. For the bar, I'm assuming it will be much longer. But for the plates, I need to wait at least that long to paint them.

Adamcolton: /* Build Log */

2015-11-04T20:53:59Z

Build Log

← Older revision		Revision as of 20:53, 4 November 2015
Line 71:		Line 71:

	I'm designing the width bar for 600lbs, not that I'm sure the bar could handle it or that I'll ever get there. That's 300lbs/side. Plates 4x64 + 32 + 8 + 4. So the total width would be 21.5in. But is that the widest? What about 3x64 + 1 of every other? Nope, 20.9 in. I measured my grip and 45in felt wide. So the bar needs to be 88in long (7ft 4in).		I'm designing the width bar for 600lbs, not that I'm sure the bar could handle it or that I'll ever get there. That's 300lbs/side. Plates 4x64 + 32 + 8 + 4. So the total width would be 21.5in. But is that the widest? What about 3x64 + 1 of every other? Nope, 20.9 in. I measured my grip and 45in felt wide. So the bar needs to be 88in long (7ft 4in).

			My first 1lb weight, well... Too watery. Should be 2T of water per lb of dry concrete. I set everything up to be watertight, and that's not really necessary or good. And in doing so left all sorts of depressions in the surface (I did smooth them out later). I'm going to take some scrap plywood and sand it out really smooth and paint it and mark down all the weight radius's. I can just work right on there and clean it between. I can use cardboard with a layer of duct tape around the outside. I'll also cut some scrap wood for imprints. My fingers are about a 1/2" wide, so I want a 1/4" gap about 2" deep around the outside of each plate. I want the weight pressed into each side. And the decorative spokes.

Adamcolton: /* Build Log */

2015-11-04T16:45:49Z

Build Log

← Older revision		Revision as of 16:45, 4 November 2015
Line 59:		Line 59:

	I want the diameter of the plates to increase linear, and will adjust their thickness to fit. A 64 pound plate with a 15in diameter would need to be 5.3in thick. going up to 16in drops it to 4.7in, 17in:4.14. I think I'll go to 17in. So I'l leave the 1 lb plate at 2.3in r, but for 2lbs, we'll go to 3.5in r and increase by 1 in every step up. Checking the math, a 32lb plate will be 15in wide and only 2.7in thick. Pretty good.		I want the diameter of the plates to increase linear, and will adjust their thickness to fit. A 64 pound plate with a 15in diameter would need to be 5.3in thick. going up to 16in drops it to 4.7in, 17in:4.14. I think I'll go to 17in. So I'l leave the 1 lb plate at 2.3in r, but for 2lbs, we'll go to 3.5in r and increase by 1 in every step up. Checking the math, a 32lb plate will be 15in wide and only 2.7in thick. Pretty good.

			Plate Diminesions
			* lbs radius width
			* 01 2.3 1.00
			* 02 3.5 0.80
			* 04 4.5 0.95
			* 08 5.5 1.25
			* 16 6.5 1.78
			* 32 7.5 2.67
			* 64 8.5 4.15

			I'm designing the width bar for 600lbs, not that I'm sure the bar could handle it or that I'll ever get there. That's 300lbs/side. Plates 4x64 + 32 + 8 + 4. So the total width would be 21.5in. But is that the widest? What about 3x64 + 1 of every other? Nope, 20.9 in. I measured my grip and 45in felt wide. So the bar needs to be 88in long (7ft 4in).

Adamcolton: /* Build Log */

2015-11-04T16:17:13Z

Build Log

← Older revision		Revision as of 16:17, 4 November 2015
Line 57:		Line 57:
	o = 2.3 in		o = 2.3 in
	r = 14.45 in		r = 14.45 in

			I want the diameter of the plates to increase linear, and will adjust their thickness to fit. A 64 pound plate with a 15in diameter would need to be 5.3in thick. going up to 16in drops it to 4.7in, 17in:4.14. I think I'll go to 17in. So I'l leave the 1 lb plate at 2.3in r, but for 2lbs, we'll go to 3.5in r and increase by 1 in every step up. Checking the math, a 32lb plate will be 15in wide and only 2.7in thick. Pretty good.

Adamcolton: /* Build Log */

2015-11-04T15:25:08Z

Build Log

← Older revision		Revision as of 15:25, 4 November 2015
Line 56:		Line 56:
	Which gives		Which gives
	o = 2.3 in		o = 2.3 in
			r = 14.45 in

Adamcolton: /* Build Log */

2015-11-04T15:23:48Z

Build Log

← Older revision		Revision as of 15:23, 4 November 2015
Line 49:		Line 49:
	v = hπ(o^2-i^2)		v = hπ(o^2-i^2)
	o = ( (v/h*π) + i^2)^0.5		o = ( (v/h*π) + i^2)^0.5

			For 1lb plate
			v = 14.57 in^3
			h = 1 in (chosen arbitrarily)
			i = 0.8125 in
			Which gives
			o = 2.3 in

Adamcolton at 15:17, 4 November 2015

2015-11-04T15:17:57Z

← Older revision		Revision as of 15:17, 4 November 2015
Line 26:		Line 26:
	== Grand Total ==		== Grand Total ==
	$105		$105

			== Build Log ==
			Actual cost: $107

			Quikcrete
			Quikcrete: 3/4C = 323g
			1lb = 435.5g
			1C = 14.44 in^3
			431.7 g/c
			29.9 g/in^3
			14.57 in^3 / lb

			Plastic pipe
			408g
			1 5/8 in outer diameter
			24 5/8 long
			16.6 g/in

			I'm going to start by casting a 1lb weight. It will take a while to set, but if it doesn't turn out, I can throw it out without worrying. And it will give me some information about working with the concrete.

			The math for a plate is
			v = hπ(o^2-i^2)
			o = ( (v/h*π) + i^2)^0.5