Stepper Motor and Controller Primer - Revision history

Patrick at 17:17, 18 September 2017

2017-09-18T17:17:04Z

← Older revision		Revision as of 17:17, 18 September 2017
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	===Planetary Gearbox Reduction Ratios===		===Planetary Gearbox Reduction Ratios===

	[[File:Planetary_gearing.jpg\|thumb\|300px\|link=\|This diagram illustrates the parts of a 5.18:1 planetary gearbox.<br>[/docs21/images/1/1a/Planetary_gearing.jpg Click for Larger Image]]]		[[File:Planetary_gearing.jpg\|thumb\|300px\|link=\|This diagram illustrates the parts of a 5.18:1 planetary gearbox.<br>[{{SERVER}}/docs21/images/1/1a/Planetary_gearing.jpg Click for Larger Image]]]

	In some applications, it is important to know the exact gear ratio of a gearbox (for example, when you need the output shaft to make a several complete rotations		In some applications, it is important to know the exact gear ratio of a gearbox (for example, when you need the output shaft to make a several complete rotations

Patrick at 17:16, 18 September 2017

2017-09-18T17:16:40Z

← Older revision		Revision as of 17:16, 18 September 2017
Line 189:		Line 189:
	===Planetary Gearbox Reduction Ratios===		===Planetary Gearbox Reduction Ratios===

	[[File:Planetary_gearing.jpg\|thumb\|300px\|link=\|This diagram illustrates the parts of a 5.18:1 planetary gearbox.<br>[[[/docs21/images/1/1a/Planetary_gearing.jpg Click for Larger Image]]]		[[File:Planetary_gearing.jpg\|thumb\|300px\|link=\|This diagram illustrates the parts of a 5.18:1 planetary gearbox.<br>[/docs21/images/1/1a/Planetary_gearing.jpg Click for Larger Image]]]

	In some applications, it is important to know the exact gear ratio of a gearbox (for example, when you need the output shaft to make a several complete rotations		In some applications, it is important to know the exact gear ratio of a gearbox (for example, when you need the output shaft to make a several complete rotations

Patrick at 17:16, 18 September 2017

2017-09-18T17:16:10Z

← Older revision		Revision as of 17:16, 18 September 2017
Line 189:		Line 189:
	===Planetary Gearbox Reduction Ratios===		===Planetary Gearbox Reduction Ratios===

	[[File:Planetary_gearing.jpg\|thumb\|300px\|link=\|This diagram illustrates the parts of a 5.18:1 planetary gearbox.<br>[/docs21/images/1/1a/Planetary_gearing.jpg Click for Larger Image]]]		[[File:Planetary_gearing.jpg\|thumb\|300px\|link=\|This diagram illustrates the parts of a 5.18:1 planetary gearbox.<br>[[[/docs21/images/1/1a/Planetary_gearing.jpg Click for Larger Image]]]

	In some applications, it is important to know the exact gear ratio of a gearbox (for example, when you need the output shaft to make a several complete rotations		In some applications, it is important to know the exact gear ratio of a gearbox (for example, when you need the output shaft to make a several complete rotations

Patrick at 17:15, 18 September 2017

2017-09-18T17:15:46Z

← Older revision		Revision as of 17:15, 18 September 2017
Line 189:		Line 189:
	===Planetary Gearbox Reduction Ratios===		===Planetary Gearbox Reduction Ratios===

	[[File:Planetary_gearing.jpg\|thumb\|300px\|link=\|This diagram illustrates the parts of a 5.18:1 planetary gearbox.<br>[~~http:~~/~~/newsite.int.phidgets.com/wiki~~/images/1/1a/Planetary_gearing.jpg Click for Larger Image]]]		[[File:Planetary_gearing.jpg\|thumb\|300px\|link=\|This diagram illustrates the parts of a 5.18:1 planetary gearbox.<br>[/docs21/images/1/1a/Planetary_gearing.jpg Click for Larger Image]]]

	In some applications, it is important to know the exact gear ratio of a gearbox (for example, when you need the output shaft to make a several complete rotations		In some applications, it is important to know the exact gear ratio of a gearbox (for example, when you need the output shaft to make a several complete rotations

Mparadis: /* Product Comparison Tables */

2015-05-26T19:30:47Z

Product Comparison Tables

@@ Line 328: / Line 328: @@
 |-
 | 3319||42BYGH40(M)-160-4A||Hybrid Bipolar||0.02||40000||40000||1.6||4||NEMA-17||8||464||40||46||42x42||99.5:1||40000||0.7||6
 |}

Mparadis: /* Product Comparison Tables */

2015-02-20T17:57:00Z

Product Comparison Tables

Show changes

Mparadis: /* Braking */

2013-11-01T18:54:40Z

Braking

← Older revision		Revision as of 18:54, 1 November 2013
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	There are several ways to stop a stepper motor, each with different characteristics:		There are several ways to stop a stepper motor, each with different characteristics:

	'''Set Target Position''' - If you set the target position to the motor's current position, it will stop. This is typically the best way to stop quickly and hold position, since the motor coils will still be engaged.		'''Set Target Position''' - If you set the target position to the motor's current position, it will stop. This is typically the best way to stop quickly and hold position, since the motor coils will still be engaged. You could also set the motor velocity limit to zero for a similar effect.

	'''Short the coils''' - If you have the stepper wires connected to some external circuitry, you could use a switch to short the A and B terminals together, and the C and D terminals together. Due to the [http://en.wikipedia.org/wiki/Lorentz_force Lorentz force] of the electrons in the coil, the motor will begin to brake and hold position.		'''Short the coils''' - If you have the stepper wires connected to some external circuitry, you could use a switch to short the A and B terminals together, and the C and D terminals together. Due to the [http://en.wikipedia.org/wiki/Lorentz_force Lorentz force] of the electrons in the coil, the motor will begin to brake and hold position.

Mparadis: /* Controlling the Stepper Motor */

2013-08-08T20:11:21Z

Controlling the Stepper Motor

← Older revision		Revision as of 20:11, 8 August 2013
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	There is also a small resistance to movement within the motor even when there is no current, called '''Detent Torque'''. This may be sufficient to prevent rotation in your application, especially if the stepper has a gearbox on it.		There is also a small resistance to movement within the motor even when there is no current, called '''Detent Torque'''. This may be sufficient to prevent rotation in your application, especially if the stepper has a gearbox on it.

	If the motor is not supporting a load or is not required to maintain a specific angle, it is recommended to set the Enable property to false. This will allow the motor shaft to rotate freely, but the present angle may be lost if forces on the motor-shaft are greater than can be resisted by the ~~Detent~~ torque of the unpowered motor.		If the motor is not supporting a load or is not required to maintain a specific angle, it is recommended to set the Enable property to false. This will allow the motor shaft to rotate freely, but the present angle may be lost if forces on the motor-shaft are greater than can be resisted by the detent torque of the unpowered motor.

	<br clear=all>		<br clear=all>

			===Braking===

			There are several ways to stop a stepper motor, each with different characteristics:

			'''Set Target Position''' - If you set the target position to the motor's current position, it will stop. This is typically the best way to stop quickly and hold position, since the motor coils will still be engaged.

			'''Short the coils''' - If you have the stepper wires connected to some external circuitry, you could use a switch to short the A and B terminals together, and the C and D terminals together. Due to the [http://en.wikipedia.org/wiki/Lorentz_force Lorentz force] of the electrons in the coil, the motor will begin to brake and hold position.

			'''Cut power''' - You could cut power to the controller, but since the motor coils would no longer be engaged, the momentum would cause it to continue rotating until it slows down from friction and detent.

	==Stepping Modes==		==Stepping Modes==

Mparadis: /* Selecting a Gearbox */

2013-08-08T15:24:32Z

Selecting a Gearbox

@@ Line 176: / Line 176: @@
   \text{Gearbox Step Angle} = \frac{\text{Motor Step Angle}}{\text{Gearbox Ratio}}
 </math>
 ===Gearbox Terminology===

Mparadis: /* Motor Terms */

2013-02-01T21:46:18Z

Motor Terms

← Older revision		Revision as of 21:46, 1 February 2013
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	'''Coil Resistance'''		'''Coil Resistance'''

	The electrical resistance (to direct current) of the wiring within the motor. This resistance causes some of the energy being applied to the motor to be converted into heat. Some motors and motor controllers rely solely on the electrical resistance to regulate the current flowing through the motor. The Unipolar Motors we sell, and the 1062 PhidgetStepper Unipolar rely on this inexpensive, but inefficient technique. Other motors will have very low resistance, increasing their efficiency, but requiring very sophisticated control techniques because the resistance cannot regulate the current to a safe level on its own. ~~The 1063 PhidgetStepper~~ Bipolar ~~controller~~ and our Bipolar motors use this technique, otherwise known as Chopper Drive.		The electrical resistance (to direct current) of the wiring within the motor. This resistance causes some of the energy being applied to the motor to be converted into heat. Some motors and motor controllers rely solely on the electrical resistance to regulate the current flowing through the motor. The Unipolar Motors we sell, and the 1062 PhidgetStepper Unipolar rely on this inexpensive, but inefficient technique. Other motors will have very low resistance, increasing their efficiency, but requiring very sophisticated control techniques because the resistance cannot regulate the current to a safe level on its own. Our Bipolar controllers and our Bipolar motors use this technique, otherwise known as Chopper Drive.

	'''Holding Torque'''		'''Holding Torque'''