Stepper Motor Circuits - Revision history

JeremyDarling: /* Bipolar Stepper Driver Circuit */

2008-02-26T23:57:28Z

Bipolar Stepper Driver Circuit

← Older revision		Revision as of 18:57, 26 February 2008
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	===Bipolar Stepper Driver Circuit===		===Bipolar Stepper Driver Circuit===

	Bipolar stepper drivers use H-bridges to energize the windings of the motor. H-bridges allow you to ~~chose~~ the direction of the current through the winding. Using an H-bridge configuration, there are four transistors for each winding as shown in the first figure below. However, most of the time they are prewired together so that only two inputs are needed. This makes generating pulses easier and also serves to protect against short circuits. This circuit is shown in the second figure below.		Bipolar stepper drivers use H-bridges to energize the windings of the motor. H-bridges allow you to choose the direction of the current through the winding. Using an H-bridge configuration, there are four transistors for each winding as shown in the first figure below. However, most of the time they are prewired together so that only two inputs are needed. This makes generating pulses easier and also serves to protect against short circuits. This circuit is shown in the second figure below.

	{\| align="center"		{\| align="center"

Stephens: /* L297 */

2006-08-09T18:28:49Z

L297

← Older revision		Revision as of 13:28, 9 August 2006
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	'''Digikey Part #: 497-1394-5-ND'''		'''Digikey Part #: 497-1394-5-ND'''

	The L297 is a 20-pin DIP chip that was designed specifically to control either unipolar or bipolar stepper motors. It will control two H-bridges to power two windings. Its inputs control the speed and direction of the motor. The diagram below shows the typical setup of the circuit. The A and B outputs would correspond to the X and Y inputs on the H-bridge of the first winding (see above). Likewise, the C and D outputs would correspond to the X and Y inputs on the second winding.		The [[media:L297.pdf\|L297]] is a 20-pin DIP chip that was designed specifically to control either unipolar or bipolar stepper motors. It will control two H-bridges to power two windings. Its inputs control the speed and direction of the motor. The diagram below shows the typical setup of the circuit. The A and B outputs would correspond to the X and Y inputs on the H-bridge of the first winding (see above). Likewise, the C and D outputs would correspond to the X and Y inputs on the second winding.

	[[image:l297.png\|center]]		[[image:l297.png\|center]]

Stephens: /* Bipolar Stepper Driver Circuit */

2006-08-09T18:28:19Z

Bipolar Stepper Driver Circuit

← Older revision		Revision as of 13:28, 9 August 2006
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	\|}		\|}

			You should be able to drive a bipolar motor with a unipolar motor circuit. The only difference is that there are no center winding taps to connect to the power source. Somebody correct me?

	==Indexing==		==Indexing==

Stephens: /* PIC16F684 */

2006-07-27T20:32:08Z

[[PIC16F684]]

← Older revision		Revision as of 15:32, 27 July 2006
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	===[[PIC16F684]]===		===[[PIC16F684]]===

	The PIC16F684, which is available in the lab, is a good programmable microcontroller ideally suited for controlling ~~a bipolar~~ stepper ~~motor~~.		The PIC16F684, which is available in the lab, is a good programmable microcontroller ideally suited for controlling stepper motors.

	[[media:PIC Stepper Control.pdf\|Read this document]]		[[media:PIC Stepper Control.pdf\|Read this document]]

Stephens: /* Unipolar Stepper Driver Circuit */

2006-07-27T20:24:17Z

Unipolar Stepper Driver Circuit

← Older revision		Revision as of 15:24, 27 July 2006
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	[[image:ds2003.png\|center\|300px]]		[[image:ds2003.png\|center\|300px]]

	Another chip, capable of 700mA/winding is the [[media:2559.pdf\|UDN2559B (pdf)]] (Newark Part #: 91F9975) made by [http://www.allegromicro.com/ Allegro Microsystems].

	[[image:2559.png\|center]]

	===Bipolar Stepper Driver Circuit===		===Bipolar Stepper Driver Circuit===

Stephens: /* Unipolar Stepper Driver Circuit */

2006-07-27T15:36:18Z

Unipolar Stepper Driver Circuit

← Older revision		Revision as of 10:36, 27 July 2006
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	[[image:unipolar switch circuits.jpg\|center]]		[[image:unipolar switch circuits.jpg\|center]]

	For driving a full stepper motor, with multiple coils, you can either build each of the above circuits individually, or you can use a integrated chip. One such chip is the DS2003, which is a darlington array, and is shown below. This chip can be used when the total current to each winding is less than 500 milliamps.		For driving a full stepper motor, with multiple coils, you can either build each of the above circuits individually, or you can use a integrated chip. One such chip is the [[media:DS2003.pdf\|DS2003]], which is a darlington array, and is shown below. This chip can be used when the total current to each winding is less than 500 milliamps.

	[[image:ds2003.png\|center\|300px]]		[[image:ds2003.png\|center\|300px]]

Stephens: /* L297 */

2006-07-05T23:38:22Z

L297

← Older revision		Revision as of 18:38, 5 July 2006
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	[[image:l297.png\|center]]		[[image:l297.png\|center]]

			This chip was specifically designed to interface with the L298N stepper motor driver chip, which is also found in the lab. [[media:L297 and L298.pdf\|See this document]].

	===[[PIC16F684]]===		===[[PIC16F684]]===

129.105.90.249: /* Indexing */

2006-07-05T23:27:01Z

Indexing

← Older revision		Revision as of 18:27, 5 July 2006
Line 71:		Line 71:

	[[image:l297.png\|center]]		[[image:l297.png\|center]]

			===[[PIC16F684]]===

			The PIC16F684, which is available in the lab, is a good programmable microcontroller ideally suited for controlling a bipolar stepper motor.

			[[media:PIC Stepper Control.pdf\|Read this document]]

	==Integrated Circuits==		==Integrated Circuits==

Stephens: /* Unipolar Stepper Driver Circuit */

2006-07-03T16:44:00Z

Unipolar Stepper Driver Circuit

← Older revision		Revision as of 11:44, 3 July 2006
Line 26:		Line 26:
	For driving a full stepper motor, with multiple coils, you can either build each of the above circuits individually, or you can use a integrated chip. One such chip is the DS2003, which is a darlington array, and is shown below. This chip can be used when the total current to each winding is less than 500 milliamps.		For driving a full stepper motor, with multiple coils, you can either build each of the above circuits individually, or you can use a integrated chip. One such chip is the DS2003, which is a darlington array, and is shown below. This chip can be used when the total current to each winding is less than 500 milliamps.

	[[image:ds2003.png\|center]]		[[image:ds2003.png\|center\|300px]]

	Another chip, capable of 700mA/winding is the [[media:2559.pdf\|UDN2559B (pdf)]] (Newark Part #: 91F9975) made by [http://www.allegromicro.com/ Allegro Microsystems].		Another chip, capable of 700mA/winding is the [[media:2559.pdf\|UDN2559B (pdf)]] (Newark Part #: 91F9975) made by [http://www.allegromicro.com/ Allegro Microsystems].

Stephens: /* Unipolar Stepper Driver Circuit */

2006-07-03T16:43:43Z

Unipolar Stepper Driver Circuit

← Older revision		Revision as of 11:43, 3 July 2006
Line 26:		Line 26:
	For driving a full stepper motor, with multiple coils, you can either build each of the above circuits individually, or you can use a integrated chip. One such chip is the DS2003, which is a darlington array, and is shown below. This chip can be used when the total current to each winding is less than 500 milliamps.		For driving a full stepper motor, with multiple coils, you can either build each of the above circuits individually, or you can use a integrated chip. One such chip is the DS2003, which is a darlington array, and is shown below. This chip can be used when the total current to each winding is less than 500 milliamps.

	[[image:ds2003.png~~\|250px~~\|center]]		[[image:ds2003.png\|center]]

	Another chip, capable of 700mA/winding is the [[media:2559.pdf\|UDN2559B (pdf)]] (Newark Part #: 91F9975) made by [http://www.allegromicro.com/ Allegro Microsystems].		Another chip, capable of 700mA/winding is the [[media:2559.pdf\|UDN2559B (pdf)]] (Newark Part #: 91F9975) made by [http://www.allegromicro.com/ Allegro Microsystems].

	[[image:2559.png~~\|250px~~\|center]]		[[image:2559.png\|center]]

	===Bipolar Stepper Driver Circuit===		===Bipolar Stepper Driver Circuit===