Open Source Stepper Motor Controller - Revision history

Frisco Rose: /* simplified driver ic part */

2013-06-03T23:40:27Z

simplified driver ic part

← Older revision		Revision as of 23:40, 3 June 2013
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	That is only part of a driver circuit. The current sense circuit is not shown and it looks like the firmware will have to do the sequencing, current control and microstepping. The LM5101 is not recommended for new designs.		That is only part of a driver circuit. The current sense circuit is not shown and it looks like the firmware will have to do the sequencing, current control and microstepping. The LM5101 is not recommended for new designs.

	There are more modern chips that you just add external FETs and sense resistors to get a complete microstepping chopper driver. For example: http://www.allegromicro.com/en/Products/Part_Numbers/3986/index.asp		There are more modern chips that you just add external FETs and sense resistors to get a complete microstepping chopper driver. For example: http://www.allegromicro.com/en/Products/Part_Numbers/3986/index.asp (part deprecated in favor of http://www.allegromicro.com/en/Products/Motor-Driver-And-Interface-ICs/Bipolar-Stepper-Motor-Drivers/A4989.aspx ).

	=References=		=References=

Marcin: /* See Also */

2013-05-12T00:09:25Z

Marcin: /* Factor e Farm Status */

2013-04-08T13:06:54Z

Factor e Farm Status

← Older revision		Revision as of 13:06, 8 April 2013
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	=Factor e Farm Status=		=Factor e Farm Status=
	[[SnapLock CNC]] and [[Open Source Torch Table Prototype II]] ~~are being built~~ in January 2012.		[[SnapLock CNC]] and [[Open Source Torch Table Prototype II]] were considered in January 2012.

	=Introduction=		=Introduction=

Donovan: /* See Also */

2012-11-30T09:10:19Z

Marcin at 15:40, 12 November 2012

2012-11-12T15:40:39Z

← Older revision		Revision as of 15:40, 12 November 2012
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	{{Category=RepLab Tools}}		{{Category=RepLab Tools}}

	'' See also [[Stepper Motor]]'' and see also [[Problem_Statement_for_a_Universal_Power_Supply]]. See also [[~~OStepper~~ Motor Controller]]		'' See also [[Stepper Motor]]'' and see also [[Problem_Statement_for_a_Universal_Power_Supply]]. See also [[OSE Open Source Stepper Motor Controller]]

	=Factor e Farm Status=		=Factor e Farm Status=

Marcin at 15:40, 12 November 2012

2012-11-12T15:40:11Z

← Older revision		Revision as of 15:40, 12 November 2012
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	{{Category=RepLab Tools}}		{{Category=RepLab Tools}}

	'' See also [[Stepper Motor]]'' and see also [[Problem_Statement_for_a_Universal_Power_Supply]]		'' See also [[Stepper Motor]]'' and see also [[Problem_Statement_for_a_Universal_Power_Supply]]. See also [[OStepper Motor Controller]]

	=Factor e Farm Status=		=Factor e Farm Status=

ERos: /* Design Rationale */

2012-06-01T20:05:38Z

Design Rationale

← Older revision		Revision as of 20:05, 1 June 2012
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	This design should give good performance, excellent versatility, good replicability, and moderate cost.		This design should give good performance, excellent versatility, good replicability, and moderate cost.

			If want use EMC (capable of nine axles actuators, like robot arm, easy and ready) it need direct connection to encoders and motor pwm/dir or step/dir level. It don't need complicated drivers/boards, only simple dir/step or dir/pwm board one per motor. EMC take G-code input and is 100% software in easy enviroment (pc-linux).

	=Block Diagram and Modules=		=Block Diagram and Modules=

ERos: /* Concept */

2012-06-01T19:55:25Z

Concept

← Older revision		Revision as of 19:55, 1 June 2012
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	=Concept=		=Concept=

	The output of this project will be a family of general purpose electronic drivers for a variety of electromechanical actuators. The first of them will be a stepper motor driver. With the appropriate alternative firmware (embedded software) the same hardware might be used as a servo driver for a brush-DC servo. With a modified output stage we could drive brushless DC or AC servos, or linear motors.		The output of this project will be a family of general purpose electronic drivers for a variety of electromechanical actuators. The first of them will be a stepper motor driver http://reprap.org/wiki/Stepper_Motor_Driver_1.1. With the appropriate alternative firmware (embedded software) the same hardware might be used as a servo driver for a brush-DC servo. With a modified output stage we could drive brushless DC or AC servos, or linear motors.

	=Design Rationale=		=Design Rationale=

ERos: /* Introduction */

2012-06-01T19:52:02Z

Introduction

← Older revision		Revision as of 19:52, 1 June 2012
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	Stepper motors are the simplest drive for moderate precision motion control applications (such as CNC plasma cutting). They provide the best price:performace for low to moderate mechanical power (<200W) at low to moderate RPM (<500 RPM). There is no open source stepper driver, AFAIK. This project will fill that need.		Stepper motors are the simplest drive for moderate precision motion control applications (such as CNC plasma cutting). They provide the best price:performace for low to moderate mechanical power (<200W) at low to moderate RPM (<500 RPM). There is no open source stepper driver, AFAIK. This project will fill that need.
	There are many L297 + L298 based circuits (2.5A 50V). L297 is cheap (~1.5$) but can do only full and half steps. Early repraps used L297+L298 controller. If put more money can use microcontroller like pic16F877 and that route can be cheaper if need six ore more axles. AD pin shortage usually renders microcontroller out, because every ~~motor~~ needs two AD pin for current sense. But microcontroller can handle multiple brush motors with encoders, like some cheap handdrills. That way generate cheap and powerful route to produce multiple axles in EMC controlled robot arm etc.		There are many L297 + L298 based circuits (2.5A 50V). L297 is cheap (~1.5$) but can do only full and half steps. Early repraps used L297+L298 controller. If put more money can use microcontroller like pic16F877 and that route can be cheaper if need six ore more axles. AD pin shortage usually renders microcontroller and steppers out, because every steppermotor needs two AD pin for current sense. But microcontroller can handle multiple brush motors with encoders, like some cheap handdrills. That way generate cheap and powerful route to produce multiple axles in EMC controlled robot arm etc.

	=Concept=		=Concept=

ERos: /* Introduction */

2012-06-01T19:49:37Z

Introduction

← Older revision		Revision as of 19:49, 1 June 2012
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	See [[Open Source Stepper Motor Controller Problem Statement]] as a start.		See [[Open Source Stepper Motor Controller Problem Statement]] as a start.

	Stepper motors are the simplest drive for moderate precision motion control applications (such as CNC plasma cutting). They provide the best price:performace for low to moderate mechanical power (<200W) at low to moderate RPM (<500 RPM). There is no open source stepper driver, AFAIK. This project will fill that need.		Stepper motors are the simplest drive for moderate precision motion control applications (such as CNC plasma cutting). They provide the best price:performace for low to moderate mechanical power (<200W) at low to moderate RPM (<500 RPM). There is no open source stepper driver, AFAIK. This project will fill that need.
			There are many L297 + L298 based circuits (2.5A 50V). L297 is cheap (~1.5$) but can do only full and half steps. Early repraps used L297+L298 controller. If put more money can use microcontroller like pic16F877 and that route can be cheaper if need six ore more axles. AD pin shortage usually renders microcontroller out, because every motor needs two AD pin for current sense. But microcontroller can handle multiple brush motors with encoders, like some cheap handdrills. That way generate cheap and powerful route to produce multiple axles in EMC controlled robot arm etc.

	=Concept=		=Concept=

← Older revision		Revision as of 00:09, 12 May 2013
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	=See Also=		=See Also=
			* [[Stepper Motor Controller Emails]]
	* [[Stepper Motor]]		* [[Stepper Motor]]
	* [[Open Source Stepper Motor]]		* [[Open Source Stepper Motor]]

← Older revision		Revision as of 09:10, 30 November 2012
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	[[Category:Torch Table]]		[[Category:Torch Table]]
			[[Category:Stepper Controller]]