Cold Saw/V1 Design Rationale/Blade Rotation System/Drive - Revision history

YK at 18:48, 20 June 2012

2012-06-20T18:48:41Z

← Older revision		Revision as of 18:48, 20 June 2012
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	[[Image: ColdSawV1HydDirDrv.png]]		[[Image: ColdSawV1HydDirDrv.png]]

			=Parts=

			[http://opensourceecology.org/wiki/Cold_Saw/V1_Design_Files/Hydraulic_Motor Hydraulic Motor]

			[http://opensourceecology.org/wiki/Cold_Saw/V1_Design_Files/Shaft_Coupling Shaft Coupling]

			[http://opensourceecology.org/wiki/Cold_Saw/V1_Design_Files/Mount_Disc Mount Disc]

			[http://opensourceecology.org/wiki/Cold_Saw/V1_Design_Files/Blade Blade]

	=Comments=		=Comments=

YK: /* Notes */

2012-06-20T00:24:27Z

Notes

← Older revision		Revision as of 00:24, 20 June 2012
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	In order to achieve straight cuts, axis of rotation should be perpendicular to the plane of the cut. Solution is to surface grind the part that the blade presses against.		In order to achieve straight cuts, axis of rotation should be perpendicular to the plane of the cut. Solution is to surface grind the part that the blade presses against.

			In order to protect the operator from high-speed flying chips, the blade should rotate away from the operator at the point of contact with the material being cut.

	In order to prevent blade slippage, torque transmission from the hydraulic motor shaft to the blade should be mechanically supported. Solution is to insert pins into the blade that also go into a part that is strongly connected to the hydraulic motor shaft.		In order to prevent blade slippage, torque transmission from the hydraulic motor shaft to the blade should be mechanically supported. Solution is to insert pins into the blade that also go into a part that is strongly connected to the hydraulic motor shaft.

YK: /* Comments */

2012-06-19T23:32:38Z

Comments

← Older revision		Revision as of 23:32, 19 June 2012
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	Because direct drive is used, a shaft coupling can be directly mounted onto the shaft of the hydraulic motor. The shaft coupling is held to the hydraulic motor shaft by a set screw.		Because direct drive is used, a shaft coupling can be directly mounted onto the shaft of the hydraulic motor. The shaft coupling is held to the hydraulic motor shaft by a set screw.

	A precise rod is inserted into the other end of the shaft coupling; this rod allows the other components to be mounted precisely at the center of the axis of rotation. The rod is held inside the shaft coupling by a small ~~rod (inserted perpendicular to the axis of rotation)~~ that ~~goes through the shaft coupling and rod;~~ the ~~small rod is held in place by 2 split pins (1 at each end)~~.		A precise rod is inserted into the other end of the shaft coupling; this rod allows the other components to be mounted precisely at the center of the axis of rotation. The rod is held inside the shaft coupling by a small bolt that is tightened with a nut on the other side.

	A large diameter mounting disc (a large thin cylinder) is welded onto the rod end of the shaft coupling at a precise angle perpendicular to the axis of rotation such that the blade is precisely perpendicular to the axis of rotation as well if the blade is pressed against the mount disc.		A large diameter mounting disc (a large thin cylinder) is welded onto the rod end of the shaft coupling at a precise angle perpendicular to the axis of rotation such that the blade is precisely perpendicular to the axis of rotation as well if the blade is pressed against the mount disc.

YK at 23:15, 19 June 2012

2012-06-19T23:15:20Z

← Older revision		Revision as of 23:15, 19 June 2012
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	In order to prevent blade slippage, torque transmission from the hydraulic motor shaft to the blade should be mechanically supported. Solution is to insert pins into the blade that also go into a part that is strongly connected to the hydraulic motor shaft.		In order to prevent blade slippage, torque transmission from the hydraulic motor shaft to the blade should be mechanically supported. Solution is to insert pins into the blade that also go into a part that is strongly connected to the hydraulic motor shaft.


	Hydraulic motors provide high torque and low speed operation without a gearbox		Hydraulic motors provide high torque and low speed operation without a gearbox

YK: /* Hydraulic Direct Drive */

2012-06-19T23:15:14Z

Hydraulic Direct Drive

← Older revision		Revision as of 23:15, 19 June 2012
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	In order to prevent blade slippage, torque transmission from the hydraulic motor shaft to the blade should be mechanically supported. Solution is to insert pins into the blade that also go into a part that is strongly connected to the hydraulic motor shaft.		In order to prevent blade slippage, torque transmission from the hydraulic motor shaft to the blade should be mechanically supported. Solution is to insert pins into the blade that also go into a part that is strongly connected to the hydraulic motor shaft.

	~~=Hydraulic Direct Drive=~~

	~~provides~~ high torque and low speed operation without a gearbox~~'''~~		Hydraulic motors provide high torque and low speed operation without a gearbox

			=Conceptualize=

	[[Image: ColdSawV1HydDirDrv.png]]		[[Image: ColdSawV1HydDirDrv.png]]

	*Comments:		=Comments=

	Because direct drive is used, a shaft coupling can be directly mounted onto the shaft of the hydraulic motor. The shaft coupling is held to the hydraulic motor shaft by a set screw.		Because direct drive is used, a shaft coupling can be directly mounted onto the shaft of the hydraulic motor. The shaft coupling is held to the hydraulic motor shaft by a set screw.

YK: /* Notes */

2012-06-19T23:14:17Z

Notes

← Older revision		Revision as of 23:14, 19 June 2012
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	=Notes=		=Notes=

	~~Axis~~ of rotation should be perpendicular to the plane of the cut in order to ~~achieve straight cuts~~.		In order to achieve straight cuts, axis of rotation should be perpendicular to the plane of the cut. Solution is to surface grind the part that the blade presses against.

			In order to prevent blade slippage, torque transmission from the hydraulic motor shaft to the blade should be mechanically supported. Solution is to insert pins into the blade that also go into a part that is strongly connected to the hydraulic motor shaft.

	=Hydraulic Direct Drive=		=Hydraulic Direct Drive=

YK at 22:46, 19 June 2012

2012-06-19T22:46:28Z

← Older revision		Revision as of 22:46, 19 June 2012
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			=Notes=

			Axis of rotation should be perpendicular to the plane of the cut in order to achieve straight cuts.

	=Hydraulic Direct Drive=		=Hydraulic Direct Drive=

YK: Created page with "=Hydraulic Direct Drive= provides high torque and low speed operation without a gearbox''' Image: ColdSawV1HydDirDrv.png *Comments: Because direct drive is used, a shaft..."

2012-06-19T22:40:17Z

Created page with "=Hydraulic Direct Drive= provides high torque and low speed operation without a gearbox''' Image: ColdSawV1HydDirDrv.png *Comments: Because direct drive is used, a shaft..."

New page

=Hydraulic Direct Drive=

provides high torque and low speed operation without a gearbox'''

[[Image: ColdSawV1HydDirDrv.png]]

*Comments:

Because direct drive is used, a shaft coupling can be directly mounted onto the shaft of the hydraulic motor. The shaft coupling is held to the hydraulic motor shaft by a set screw.

A precise rod is inserted into the other end of the shaft coupling; this rod allows the other components to be mounted precisely at the center of the axis of rotation. The rod is held inside the shaft coupling by a small rod (inserted perpendicular to the axis of rotation) that goes through the shaft coupling and rod; the small rod is held in place by 2 split pins (1 at each end).

A large diameter mounting disc (a large thin cylinder) is welded onto the rod end of the shaft coupling at a precise angle perpendicular to the axis of rotation such that the blade is precisely perpendicular to the axis of rotation as well if the blade is pressed against the mount disc.

Another mount disc is mounted into the rod after the blade so that the blade is supported from both ends by a mount disc.

Both mount discs have a pinhole pattern that matches the pinhole pattern on the blade. Small rods are inserted into the matched pinholes such that high torque can be transmitted from the hydraulic motor shaft to the shaft coupling to the welded mount disc to the blade- without slipping. The pins are held by split pins at each end.

A shaft collar is mounted onto the rod after the second mount disc. The shaft collar is held onto the rod by 4 setscrews. The shaft collar exerts force on the non-welded mount disc through 4 setscrews; the pressing force is transmitted from the shaft collar to the non-welded mount disc to the blade. The blade becomes precisely pressed against the welded mount disc.