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Smooth Drive Function for Enhanced Ease of Use

The Smooth Drive Function automatically controls operations via microstep drive at the same travel distance and speed used in the full-step mode, without requiring the operator to change the pulse input settings. This function is particularly useful when the CRK Series is used in full-step or half-step mode.

Motor Features

• Lower Vibration
• Increased Position Accuracy
• Higher Resolution

Available Frame Sizes

Newly Designed Motors

High-Torque Motor

The high-resolution type and high-torque type adopt a newly designed high-torque motor that widens the range of applications.
- The smaller motor allows for compact equipment design.
- The motor current is reduced to suppress heat generation.

Compact, Lightweight Microstepping Driver

The driver in the CRK Series achieves microstep drive in a compact, lightweight body. A new IC allows the driver to provide various functions, including the following:

• Smooth Drive Function
• 1-pulse/2-pulse input mode switching
• 25 preset step angles
• Power LED
• Photocoupler input

The compact, lightweight driver in the CRK Series is approximately 45% smaller than a conventional full-step driver.

Lower Vibration and Noise Achieved by Microstep Drive

The basic step angle of the motor can be divided into a maximum of 250 microstep angles without using any mechanical element such as a reduction gear. As a result, vibration and noise are further reduced.

Improved Performance can Usually be Easily Integrated into an Existing 2-Phase System

The basic step angle can be adjusted to match a 2-phase stepping motor's step angles, so a switchover from the 2-phase microstep mode can be easily made without having to change input pulses.

Encoder Models Available

500 or 1000 pulse/rev.

2/ 3-channel TTL type

RoHS Compliant

RoHS (Restriction of Hazardous Substances) Directive:
Directive on restriction of the use of certain hazardous substances in electrical and electronic equipment (2002/95/EC).
The RoHS Directive prohibits the use of six chemical substances in electrical and electronic products sold in the EU member states. The six controlled substances are: lead, hexavalent chromium, cadmium, mercury and two specific brominated flame-retardants (PBB and PBDE).

Also Available

Product Lineup

Type		Features	Motor Frame Size
			no Encoder	Encoder	Basic Step Angle	Max. Holding Torque
High-Torque		A high torque motor generating high torque of approx. 1.3 to 1.5 times the level achieved by the standard type.	0.79 in (20 mm)	-	0.72°	3.2 oz-in (0.0231 N·m)
			1.10 in. (28 mm)	-		6.8 ~ 11 oz-in (0.048 ~ 0.078 N·m)
			1.65 in. (42 mm)	1.65 in. (42 mm)		34 ~ 59 oz-in (0.24 ~ 0.42 N·m)
High-Resolution		A high-torque motor offering higher positioning accuracy with the basic step angle set to 0.36°/step, or half the basic step angle of the standard type.	1.10 in. (28 mm)	-	0.36°	5.9 ~ 12.7 oz-in (0.042 ~ 0.09 N·m)
			1.65 in. (42 mm)	1.65 in. (42 mm)		34 ~ 59 oz-in (0.24 ~ 0.42 N·m)
			2.36 in. (60 mm)	2.36 in. (60 mm)		110 ~ 320 oz-in (0.78 ~ 2.3 N·m)
Standard		The basic model in the CRK Series offering an optimal balance of torque, low vibration and low noise.	1.65 in. (42 mm)	1.65 in. (42 mm)	0.72°	18.4 ~ 34 oz-in (0.13 ~ 0.24 N·m)
			2.36 in. (60 mm)	2.36 in. (60 mm)		59 ~ 230 oz-in (0.42 ~ 1.66 N·m)
	TH Geared (Taper Hobbed)	A geared motor achieving both low backlash and low cost. • Backlash: 10 ~ 60 arc minute • Gear ratios:  3.6:2, 7.2:1, 10:1, 20:1, 30:1	1.10 in. (28 mm)	-	0.024° - 0.1°	28 ~ 71 oz-in (0.2 ~ 0.5 N·m)
			1.65 in. (42 mm)	1.65 in. (42 mm)	0.024° - 0.2°	3 ~ 13.2 lb-in (0.35 ~ 1.5 N·m)
			2.36 in. (60 mm)	2.36 in. (60 mm)		11 ~ 35 lb-in (1.25 ~ 4 N·m)
	PS Geared (Planetary Gear)	A geared motor achieving superior performance with high permissible torque / maximum torque, high resolution, low backlash with center shaft. • Backlash: 15 ~ 35 arc minute • Gear ratios: 5:1, 7.2:1, 10:1, 25:1, 36:1 and 50:1	1.10 in. (28 mm)	-	0.072° - 0.144°	28 ~ 56 oz-in (0.2 ~ 0.4 N·m)
			1.65 in. (42 mm)	1.65 in. (42 mm)	0.0144° - 0.144°	8.8 ~ 26 lb-in (1.0 ~ 3  N·m)
			2.36 in. (60 mm)	2.36 in. (60 mm)		30 ~ 70 lb-in (3.5 ~ 8 N·m)
	PN Geared (Planetary Gear)	A high-accuracy geared motor achieving a backlash of 3 arc minutes or less. It also provides high strength and wide gear ratios. • Backlash: 2 ~ 3 arc minute • Gear ratios: 5:1, 7.2:1, 10:1, 25:1, 36:1, 50:1	1.10 in. (28 mm)	-	0.072° - 0.144°	28 ~ 56 oz-in (0.2 ~ 0.4 N·m)
			1.65 in. (42 mm)	-		7 ~ 13.2 lb-in (0.8 ~ 1.5 N·m)
			2.36 in. (60 mm)	-	0.0144° - 0.144°	30 ~ 70 lb-in (3.5 ~ 8 N·m)
	HG Geared (Harmonic Gear)	A high-accuracy, backlash-free geared motor adopting a newly developed harmonic gear. It ensures high strength in a compact body. • Backlash: 0 arc minute • Gear Ratios: 50:1, 100:1	0.79 in. (20 mm)	-	0.0072° - 0.0144°	3.5 ~ 5.3 lb-in (0.4 ~ 0.6 N·m)
			1.18 in. (30 mm)	-		15.9 ~ 21 lb-in (1.8 ~ 2.4 N·m)
			1.65 in. (42 mm)	1.65 in. (42 mm)		30 ~ 44 lb-in (3.5 ~ 5 N·m)
			2.36 in. (60 mm)	2.36 in. (60 mm)		48 ~ 70 lb-in (5.5 ~ 8 N·m)