Shredder Drive - Revision history

Marcin: /* Cost */

2020-06-23T22:23:33Z

Cost

← Older revision		Revision as of 22:23, 23 June 2020
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	*Round tube, 5 mm wall (0.188") - $25/ft [http://www.metalbythefoot.com/]		*Round tube, 5 mm wall (0.188") - $25/ft [http://www.metalbythefoot.com/]
	*1" pipe, about $2.60 per foot (1.25 OD, 0.125 wall) - [http://www.metalbythefoot.com/]		*1" pipe, about $2.60 per foot (1.25 OD, 0.125 wall) - [http://www.metalbythefoot.com/]
			*2" schedule 40 - $35 at Menards [https://www.menards.com/main/plumbing/pipe-fittings/black-pipe-fittings/threaded-black-steel-pipe-schedule-40/gs3410btbe/plumbing/pipe-fittings/black-pipe-fittings/threaded-black-steel-pipe-schedule-40/gs110btbe/plumbing/pipe-fittings/black-pipe-fittings/threaded-black-steel-pipe-schedule-40/gs210btbe/p-1444437590092.htm]

	=Internal Links=		=Internal Links=

2020-06-23T22:21:14Z

Cost

← Older revision		Revision as of 22:21, 23 June 2020
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	*Square tube - 3/8" wall - $27/foot. (1/2" wall weighs about 27 lb)		*Square tube - 3/8" wall - $27/foot. (1/2" wall weighs about 27 lb)
	*Round tube, 5 mm wall (0.188") - $25/ft [http://www.metalbythefoot.com/]		*Round tube, 5 mm wall (0.188") - $25/ft [http://www.metalbythefoot.com/]
			*1" pipe, about $2.60 per foot (1.25 OD, 0.125 wall) - [http://www.metalbythefoot.com/]

	=Internal Links=		=Internal Links=

2020-06-23T22:04:09Z

Internal Links

← Older revision		Revision as of 22:04, 23 June 2020
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	'''See [[Motor Selection Criteria]]'''		'''See [[Motor Selection Criteria]]'''

			=Cost=
			*Square tube - 3/8" wall - $27/foot. (1/2" wall weighs about 27 lb)
			*Round tube, 5 mm wall (0.188") - $25/ft [http://www.metalbythefoot.com/]

	=Internal Links=		=Internal Links=

2020-06-01T22:59:31Z

First Order Shaft Torque Calculations

← Older revision		Revision as of 22:59, 1 June 2020
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	*1" shafts made of mild steel would break at 3000 ft lb of torque (ref?)		*1" shafts made of mild steel would break at 3000 ft lb of torque (ref?)
	*Minimum torque requirement 200 ft lb, or 28 kg m. This is 1/6 the strongest motor.		*Minimum torque requirement 200 ft lb, or 28 kg m. This is 1/6 the strongest motor.
	*[[Precious Plastic Shredder]] calls for 3 kg m from [[Lyman_Filament_Maker_Calculations#More]. But that is old - and apparently not enough. The PP Pro shredder calls for 100 kg-m torque.		*[[Precious Plastic Shredder]] calls for 3 kg m from [[Lyman_Filament_Maker_Calculations#More]]. But that is old - and apparently not enough. The PP Pro shredder calls for 100 kg-m torque.

	=Motor Torque=		=Motor Torque=

2020-05-31T19:42:18Z

Gears

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	==Belt Geardown==		==Belt Geardown==
	*Serpentine belt on D=1.3" shaft of [[Treadmill Motor]]		*Serpentine belt on D=1.3" shaft of [[Treadmill Motor]]

	~~==Gears==~~
	~~===Planetary Gears===~~
	*[[Planetary Gearbox]]

	=Motor Choices=		=Motor Choices=

2020-05-31T19:42:08Z

Motor Choices

← Older revision		Revision as of 19:42, 31 May 2020
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	=Motor Choices=		=Motor Choices=
			Try a treadmill motor (3kW) and a drill motor (100W).

	*Brushed motor is 75-80% efficient. [https://www.google.com/search?q=efficiency+of+brushed+motor&oq=efficiency+of+brushed+motor&aqs=chrome..69i57.4377j0j7&client=ubuntu&sourceid=chrome&ie=UTF-8]		*Brushed motor is 75-80% efficient. [https://www.google.com/search?q=efficiency+of+brushed+motor&oq=efficiency+of+brushed+motor&aqs=chrome..69i57.4377j0j7&client=ubuntu&sourceid=chrome&ie=UTF-8]
	*We can try a small DC motor, 30W. This yields a theoretical 12 kg per 12 hour day grind rate, which is just about correct. [https://www.amazon.com/AUTOTOOLHOME-Torque-Traxxas-Wheels-Electric/dp/B01M58POHF/ref=psdc_306577011_t1_B01L6EKGGQ]		*We can try a small DC motor, 30W. This yields a theoretical 12 kg per 12 hour day grind rate, which is just about correct. [https://www.amazon.com/AUTOTOOLHOME-Torque-Traxxas-Wheels-Electric/dp/B01M58POHF/ref=psdc_306577011_t1_B01L6EKGGQ]

2020-05-31T19:41:16Z

First Order Shaft Torque Calculations

← Older revision		Revision as of 19:41, 31 May 2020
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	*1" shafts made of mild steel would break at 3000 ft lb of torque (ref?)		*1" shafts made of mild steel would break at 3000 ft lb of torque (ref?)
	*Minimum torque requirement 200 ft lb, or 28 kg m. This is 1/6 the strongest motor.		*Minimum torque requirement 200 ft lb, or 28 kg m. This is 1/6 the strongest motor.
	*[[Precious Plastic Shredder]] calls for 3 kg m from [[Lyman_Filament_Maker_Calculations#More]]		*[[Precious Plastic Shredder]] calls for 3 kg m from [[Lyman_Filament_Maker_Calculations#More]. But that is old - and apparently not enough. The PP Pro shredder calls for 100 kg-m torque.

	=Motor Torque=		=Motor Torque=

2020-05-31T19:39:25Z

Calculations

← Older revision		Revision as of 19:39, 31 May 2020
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	=Calculations=		=Calculations=
	*Largest force comparison- 15,000 in lb or 173 kg m. (1730 Nm)		*Largest force comparison- 15,000 in lb or 173 kg m. (1730 Nm) for the [[45.6 Cu In Hydraulic Motor]] that we use in [[LifeTrac]]

	=Shredding Rate=		=Shredding Rate=

2020-05-31T18:59:36Z

Motor Torque

← Older revision		Revision as of 18:59, 31 May 2020
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	=Motor Torque=		=Motor Torque=
	*[[Motor Torque Calculator]] says about 1 kg m for 3000 rpm with 3kW drive as in [[Treadmill Motor]]. Compare to 173 kg m for strongest torque relevant to tractor drive as in [[15000 In Lb Motors]].		*[[Motor Torque Calculator]] says about 1 kg m for 3000 rpm with 3kW drive as in [[Treadmill Motor]]. Compare to 173 kg m for strongest torque relevant to tractor drive as in [[15000 In Lb Motors]].
	*Our goal is in between for now, 30 kg m.		*Our goal is in between for now, 30 kg m. Reduction of only 30x to 100 RPM.

	=Geardown=		=Geardown=

2020-05-31T18:25:39Z

First Order Shaft Torque Calculations

← Older revision		Revision as of 18:25, 31 May 2020
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	=First Order Shaft Torque Calculations=		=First Order Shaft Torque Calculations=
	*1" shafts made of mild steel would break at 3000 ft lb of torque (ref?)		*1" shafts made of mild steel would break at 3000 ft lb of torque (ref?)
	*Minimum torque requirement 200 ft lb, or 28 kg m.		*Minimum torque requirement 200 ft lb, or 28 kg m. This is 1/6 the strongest motor.
	*[[Precious Plastic Shredder]] calls for 3 kg m from [[Lyman_Filament_Maker_Calculations#More]]		*[[Precious Plastic Shredder]] calls for 3 kg m from [[Lyman_Filament_Maker_Calculations#More]]