D3D v20.04 Calculations - Revision history

Marcin: /* Bed Weight and Lifting Capacity */

2020-05-07T18:47:50Z

Bed Weight and Lifting Capacity

← Older revision		Revision as of 18:47, 7 May 2020
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	*Weight of bed - 7.5 lb for top and bottom, 3.5 lb for sides. Rods - .26 lb per foot, we have 3 feet - 1 lb more. Insulation - maybe 1.4 lb / cu ft [https://www.google.com/search?q=weight+of+rock+wool&oq=weight+of+rock+wool&aqs=chrome..69i57j0l5.4148j0j7&client=ubuntu&sourceid=chrome&ie=UTF-8]. We have 1/6 cubic foot, so only a quarter pounder of fluff.		*Weight of bed - 7.5 lb for top and bottom, 3.5 lb for sides. Rods - .26 lb per foot, we have 3 feet - 1 lb more. Insulation - maybe 1.4 lb / cu ft [https://www.google.com/search?q=weight+of+rock+wool&oq=weight+of+rock+wool&aqs=chrome..69i57j0l5.4148j0j7&client=ubuntu&sourceid=chrome&ie=UTF-8]. We have 1/6 cubic foot, so only a quarter pounder of fluff.
	**'''Total bed weight: about 12 lb'''		**'''Total bed weight: about 12 lb'''
	*Bed volume of 1440 cu in, is 25 lb of max plastic mass that can be printed.		*Bed volume of 1440 cu in, is 25 lb of max plastic mass that can be printed (assuming 50% full build plate, the maximum foreseeable print weight based on 100% infill.
	*Density of plastics is about 1 g/cc. [https://www.stelray.com/reference-tables/]. So 1 liter is about 1 kg.		*Density of plastics is about 1 g/cc. [https://www.stelray.com/reference-tables/]. So 1 liter is about 1 kg.
	*Thus, if steppers can hold 25 additional lb, that would suffice for any print whatsoever. Let's test. See [[D3D v20.04 Data Collection]].		*Thus, if steppers can hold 25 additional lb, that would suffice for any print whatsoever. Let's test. See [[D3D v20.04 Data Collection]].

Marcin: /* Bed Weight and Lifting Capacity */

2020-05-07T18:23:07Z

Bed Weight and Lifting Capacity

← Older revision		Revision as of 18:23, 7 May 2020
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	*Total lift is 40 lb from both sides		*Total lift is 40 lb from both sides
	*Weight of bed - 7.5 lb for top and bottom, 3.5 lb for sides. Rods - .26 lb per foot, we have 3 feet - 1 lb more. Insulation - maybe 1.4 lb / cu ft [https://www.google.com/search?q=weight+of+rock+wool&oq=weight+of+rock+wool&aqs=chrome..69i57j0l5.4148j0j7&client=ubuntu&sourceid=chrome&ie=UTF-8]. We have 1/6 cubic foot, so only a quarter pounder of fluff.		*Weight of bed - 7.5 lb for top and bottom, 3.5 lb for sides. Rods - .26 lb per foot, we have 3 feet - 1 lb more. Insulation - maybe 1.4 lb / cu ft [https://www.google.com/search?q=weight+of+rock+wool&oq=weight+of+rock+wool&aqs=chrome..69i57j0l5.4148j0j7&client=ubuntu&sourceid=chrome&ie=UTF-8]. We have 1/6 cubic foot, so only a quarter pounder of fluff.
			**'''Total bed weight: about 12 lb'''
	*Bed volume of 1440 cu in, is 25 lb of max plastic mass that can be printed.		*Bed volume of 1440 cu in, is 25 lb of max plastic mass that can be printed.
	*Density of plastics is about 1 g/cc. [https://www.stelray.com/reference-tables/]. So 1 liter is about 1 kg.		*Density of plastics is about 1 g/cc. [https://www.stelray.com/reference-tables/]. So 1 liter is about 1 kg.

Marcin: /* Bed Weight and Lifting Capacity */

2020-05-07T18:22:11Z

Bed Weight and Lifting Capacity

← Older revision		Revision as of 18:22, 7 May 2020
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	*Density of plastics is about 1 g/cc. [https://www.stelray.com/reference-tables/]. So 1 liter is about 1 kg.		*Density of plastics is about 1 g/cc. [https://www.stelray.com/reference-tables/]. So 1 liter is about 1 kg.
	*Thus, if steppers can hold 25 additional lb, that would suffice for any print whatsoever. Let's test. See [[D3D v20.04 Data Collection]].		*Thus, if steppers can hold 25 additional lb, that would suffice for any print whatsoever. Let's test. See [[D3D v20.04 Data Collection]].
	*turns out that at most about 7-10 lb can be lifted in addition to bed weight.		*'''turns out that at most about 7-10 lb can be lifted in addition to bed weight''' using 2 stepper motors in parallel with RAMPS 1.4

	=Counterweight=		=Counterweight=

Marcin: /* Bed Weight and Lifting Capacity */

2020-05-07T18:20:59Z

Bed Weight and Lifting Capacity

← Older revision		Revision as of 18:20, 7 May 2020
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	*with 1/2 diameter pulley, that is about 20 lb driver force - about right.		*with 1/2 diameter pulley, that is about 20 lb driver force - about right.
	*Total lift is 40 lb from both sides		*Total lift is 40 lb from both sides
	*Weight of bed - 7.5 lb for top and bottom, 3.5 lb for sides. Rods - .7 lb per foot, we have 3 feet - 2 lb more. Insulation - maybe 1.4 lb / cu ft [https://www.google.com/search?q=weight+of+rock+wool&oq=weight+of+rock+wool&aqs=chrome..69i57j0l5.4148j0j7&client=ubuntu&sourceid=chrome&ie=UTF-8]. We have 1/6 cubic foot, so only a quarter pounder of fluff.		*Weight of bed - 7.5 lb for top and bottom, 3.5 lb for sides. Rods - .26 lb per foot, we have 3 feet - 1 lb more. Insulation - maybe 1.4 lb / cu ft [https://www.google.com/search?q=weight+of+rock+wool&oq=weight+of+rock+wool&aqs=chrome..69i57j0l5.4148j0j7&client=ubuntu&sourceid=chrome&ie=UTF-8]. We have 1/6 cubic foot, so only a quarter pounder of fluff.
	*Bed volume of 1440 cu in, is 25 lb of max plastic mass that can be printed.		*Bed volume of 1440 cu in, is 25 lb of max plastic mass that can be printed.
	*Density of plastics is about 1 g/cc. [https://www.stelray.com/reference-tables/]. So 1 liter is about 1 kg.		*Density of plastics is about 1 g/cc. [https://www.stelray.com/reference-tables/]. So 1 liter is about 1 kg.

Marcin: /* Counterweight */

2020-04-21T22:21:28Z

Counterweight

← Older revision		Revision as of 22:21, 21 April 2020
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	*Steel block, 2x4x3 inches (24 cubic inches) - weighs 6.7 lb. Need 2 of these as counterweights - these could counterweight the bed fully.e		*Steel block, 2x4x3 inches (24 cubic inches) - weighs 6.7 lb. Need 2 of these as counterweights - these could counterweight the bed fully.e
	*4x4 block, 1" thick - weighs 4.5 lb		*4x4 block, 1" thick - weighs 4.5 lb
	*[[File:counterweight_model.fcstd]]		*Concept of slab counterweight on 2 rods - 4x4" with 12" bed printer (18" axes) - [[File:counterweight_model.fcstd]]

	=Links=		=Links=
	*[[D3D v20.04]]		*[[D3D v20.04]]

Marcin: /* Counterweight */

2020-04-21T22:14:33Z

Counterweight

← Older revision		Revision as of 22:14, 21 April 2020
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	*Steel block, 2x4x3 inches (24 cubic inches) - weighs 6.7 lb. Need 2 of these as counterweights - these could counterweight the bed fully.e		*Steel block, 2x4x3 inches (24 cubic inches) - weighs 6.7 lb. Need 2 of these as counterweights - these could counterweight the bed fully.e
	*4x4 block, 1" thick - weighs 4.5 lb		*4x4 block, 1" thick - weighs 4.5 lb
			*[[File:counterweight_model.fcstd]]

	=Links=		=Links=
	*[[D3D v20.04]]		*[[D3D v20.04]]

Marcin: /* Counterweight */

2020-04-21T22:07:18Z

Counterweight

← Older revision		Revision as of 22:07, 21 April 2020
Line 11:		Line 11:
	=Counterweight=		=Counterweight=
	*Steel block, 2x4x3 inches (24 cubic inches) - weighs 6.7 lb. Need 2 of these as counterweights - these could counterweight the bed fully.e		*Steel block, 2x4x3 inches (24 cubic inches) - weighs 6.7 lb. Need 2 of these as counterweights - these could counterweight the bed fully.e
			*4x4 block, 1" thick - weighs 4.5 lb

	=Links=		=Links=
	*[[D3D v20.04]]		*[[D3D v20.04]]

Marcin: /* Bed Weight and Lifting Capacity */

2020-04-21T22:06:51Z

Bed Weight and Lifting Capacity

← Older revision		Revision as of 22:06, 21 April 2020
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	*turns out that at most about 7-10 lb can be lifted in addition to bed weight.		*turns out that at most about 7-10 lb can be lifted in addition to bed weight.

			=Counterweight=
			*Steel block, 2x4x3 inches (24 cubic inches) - weighs 6.7 lb. Need 2 of these as counterweights - these could counterweight the bed fully.e

	=Links=		=Links=
	*[[D3D v20.04]]		*[[D3D v20.04]]

Marcin: /* Bed Weight and Lifting Capacity */

2020-04-20T06:41:02Z

Bed Weight and Lifting Capacity

← Older revision		Revision as of 06:41, 20 April 2020
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	*Thus, if steppers can hold 25 additional lb, that would suffice for any print whatsoever. Let's test. See [[D3D v20.04 Data Collection]].		*Thus, if steppers can hold 25 additional lb, that would suffice for any print whatsoever. Let's test. See [[D3D v20.04 Data Collection]].
	*turns out that at most about 7-10 lb can be lifted in addition to bed weight.		*turns out that at most about 7-10 lb can be lifted in addition to bed weight.


			=Links=
			*[[D3D v20.04]]

Marcin: /* Bed Weight and Lifting Capacity */

2020-04-20T06:39:23Z

Bed Weight and Lifting Capacity

← Older revision		Revision as of 06:39, 20 April 2020
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	*Weight of bed - 7.5 lb for top and bottom, 3.5 lb for sides. Rods - .7 lb per foot, we have 3 feet - 2 lb more. Insulation - maybe 1.4 lb / cu ft [https://www.google.com/search?q=weight+of+rock+wool&oq=weight+of+rock+wool&aqs=chrome..69i57j0l5.4148j0j7&client=ubuntu&sourceid=chrome&ie=UTF-8]. We have 1/6 cubic foot, so only a quarter pounder of fluff.		*Weight of bed - 7.5 lb for top and bottom, 3.5 lb for sides. Rods - .7 lb per foot, we have 3 feet - 2 lb more. Insulation - maybe 1.4 lb / cu ft [https://www.google.com/search?q=weight+of+rock+wool&oq=weight+of+rock+wool&aqs=chrome..69i57j0l5.4148j0j7&client=ubuntu&sourceid=chrome&ie=UTF-8]. We have 1/6 cubic foot, so only a quarter pounder of fluff.
	*Bed volume of 1440 cu in, is 25 lb of max plastic mass that can be printed.		*Bed volume of 1440 cu in, is 25 lb of max plastic mass that can be printed.
			*Density of plastics is about 1 g/cc. [https://www.stelray.com/reference-tables/]. So 1 liter is about 1 kg.
	*Thus, if steppers can hold 25 additional lb, that would suffice for any print whatsoever. Let's test. See [[D3D v20.04 Data Collection]].		*Thus, if steppers can hold 25 additional lb, that would suffice for any print whatsoever. Let's test. See [[D3D v20.04 Data Collection]].
			*turns out that at most about 7-10 lb can be lifted in addition to bed weight.