1" (25 mm) Travel Motorized Actuators: DC Servo & Stepper Motors
Features- Non-Rotating Drive Tip
- Compact, Bi-Polar Stepper Motor Actuator: 150.5 mm (5.93") Long
- Ø3/8" Mounting Barrel
- Compatible with Mirror Mounts and Translation Stages with a 3/8" Mounting Block
- Also Available in 6 mm and 13 mm Travel Versions
Our ZST Actuators provide smooth, precise linear motion control in a sleek, compact package measuring 150.5 mm (5.93") in length. Powered by a small-diameter, dual-phase stepper motor, this actuator operates at speeds of up to 1.0 mm/s. The non-rotating drive tip reduces wear and friction and improves smoothness of motion by removing rotational contact at the tip. Mounting is via a standard Ø3/8" Barrel. The ZST225B Motorized Actuator uses a stepper motor that provides sufficient torque for large loads up to 40 N (8.99 lb). The actuator allows very small step sizes over the entire travel range, delivering greater flexibility with low (<15 µm) backlash and fine resolution. The design incorporates a 41:1 gear reduction head which, when combined with the 3072 microsteps per revolution offered by the TST001 stepper motor driver, gives a theoretical travel per microstep of 8.0 nm (see the Calculations tab for details). | Specification | Value |
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| Travel | 1.0" (25 mm) | | Gearbox Ratio | 29791:729 (approx 41:1) | | Lead Screw Pitch | 1.0 mm | | Microsteps per Revolution of the Motora | 24 full steps, 128 µsteps per full step
3072 µsteps per revolution | | Repeatability | <5.0 µm | | Home Location Accuracy | <5.0 µm | | Backlashb | <15 µm | | Max Load Capacity | 40 N (8.99 lb) | | Max Speed | 1.0 mm/s | | Max Acceleration | 10 mm/s2 | | Calculated Minimum Incremental Motion | 8 nm | | Motor Type | 2 Phase Stepper | | Limit Switches | Hall Effect | | Operating Temperature | 5 to 40 °C (41 to 104 °F) | | Cable Length | 0.6 m (2 ft) | | Connector | HDDB15 | | Compatible Controller | TST001 |
Hall effect limit switches prevent the unit from being overdriven and provide homing capability with an accuracy of <5.0 μm. The ZST225B ships with 0.6 m (2 ft) of cable terminated in a 15-pin D-Type connector that is compatible with our TST001 stepper motor controller. The ZST225B has a standard Ø0.375" mounting barrel for fastening into any application compatible with our precision micrometer heads including our popular PT1 Translation Stages. 
A LNR25 stage, with the manual adjuster replaced by a ZST225B actuator.
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How to calculate the linear displacement per microstep Each member of the ZST200 series of motors has 24 full steps per revolution, and when driven by the TST001 drivers, there are 128 microsteps per full step. Hence, there are 3072 microsteps per revolution of the motor. The output shaft of the motor goes into a 40.866:1 gear head. This requires the motor to rotate 40.866 times to rotate the 1.0 mm pitch lead screw one revolution. The end result is the lead screw advances by 1.0 mm. To calculate the linear displacement of the actuator per microstep, use the following:
Linear displacement of the lead screw per microstep:
Number of Microsteps x Gearbox Ratio = 3072 x 40.866 = 125,540 The linear displacement of the lead screw per microstep is 1.0 mm / 125,540 = 7.96 x 10-6 mm = 8.0 nm
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Connector Pin Out| Pin | Description | Pin | Description |
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| 1 | Limit Ground | 8 | Reserved For Future Use | | 2 | CCW Limit Switch | 9 | Reserved For Future Use | | 3 | CW Limit Switch | 10 | Vcc (5 V DC) | | 4 | Motor Phase B- | 11 | Reserved For Future Use | | 5 | Motor Phase B+ | 12 | Reserved For Future Use | | 6 | Motor Phase A- | 13 | Reserved For Future Use | | 7 | Motor Phase A+ | 14, 15 | Ground |
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| Specification | Value |
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| Travel | 1" (25 mm) | | Load Capacity | 48 lbs (22 kg) | | Main Screw | 1 mm Pitch Trapezoid | | Limit Switches | Ceramic Tipped,
Electro-Mechanical | | Motor Type | 2 Phase Stepper | | Min Incremental Movement | 50 nm* | | Microsteps per Revolution | 409,600 | | Bidirectional Repeatability | <1 µm | | Max Speed | 20 mm/sec | | Weight (Actuator) | 1.8 lbs (0.8 kg) | | Full Step Angle | 1.8° | | Step Angle Accuracy | 5% | | Rated Phase Current | 1 A | | Phase Resistance | 4.6 Ω | | Phase Inductance | 0.6 mH | | Holding Torque | 23.1 N-cm | | Detent Torque | 1.7 N-cm | | Rotor Inertia | 32 g-cm2 | | Insulation Class | B | | Compatible Controllers | BSC201
MST602 |
*If used with BSC201. Features- 1" (25 mm) Total Travel
- High Load Capacity
- Non-Rotating Tip
- Manual Adjuster Knob Provided
- 50 mm Travel Version Also Available
The DRV013 offers 1" (25 mm) of travel and better than 1 μm of bidirectional repeatability. When used with one of our stepper motor controllers, such as the BSC201, the DRV013 can achieve better than 50 nm resolution and a maximum speed of 20 mm/s. The hybrid stepper motor, with its rotor consisting of 50 individual magnetic teeth, is ideally suited for micro-stepping applications. Aside from the obvious increase in resolution resulting from increasing the steps per revolution from 200 to 409,600, micro-stepping also ensures smoother low speed motion by allowing the discrete 1.8º step size, which produces mechanical noise to be reduced to much smaller steps with inherently lower resultant vibrational noise. Each of our actuators features a convenient Ø1/2" (Ø12.5 mm) mounting barrel, which is compatible with any standard Ø1/2" clamping hardware. The DRV013 Stepper Motor drive has been equipped with a trapezoidal screw thread for a cleaner, more wear resistant operation than is available from standard threading. It is capable of driving loads as high as 48 lbs (22 kg). The use of a trapezoidal leadscrew in the DRV013 provides a number of benefits over the more common Acme-style thread. The benefits are improved durability, lower friction due to improved surface quality, and nearly no back-drive.
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How to calculate the linear displacement per microstep The stepper motor used in the DRV013 actuator has 200 full steps per revolution of the motor. Each full step is broken down into 128 microsteps. There are 409,600 microsteps per revolution of the motor when using the BSC201 controller. The end result is the leadscrew advances by 1.0 mm. To calculate the linear displacement of the actuator microstep, use the following: 409,600 microsteps per revolution of the lead screw The linear displacement of the lead screw per microstep is: 1.0 mm / 409,600 = 2.4 x 10-6 mm To calculate the linear displacment for a full step, substitute 409,600 with 200.
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Connector Pin Out| Pin | Description |
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| 1 | Limit Switch Ground | | 2 | Not Connected | | 3 | CW Limit Switch | | 4 | Motor Phase B- | | 5 | Motor Phase B+ | | 6 | Motor Phase A- | | 7 | Motor Phase A+ | | 8 to 12 | Reserved For Future Use | | 13 | + 5 V | | 14 | Reserved For Future Use | | 15 | Earth GND |
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| Specification | Value |
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| Bidirectional Repeatability | <1.5 µm | | Backlash | <8 µm | | Maximum Acceleration | 4 mm/sec2 | | Maximum Velocity* | 2.6 mm/sec | | Velocity Stability | ±0.125 mm/sec | | Max Vertical Load Capacity | 4.5 kg | | Max Horizontal Load Capacity | 9 kg | | Recommended Horizontal Load Capacity | <7.5 kg | | Recommended Vertical Load Capacity | <4.0 kg | | Min Achievable Incremental Movement | 0.05 µm | | Min Repeatable Incremental Movement | 0.2 µm | | Absolute On-axis Accuracy | 130 µm | | Max Percentage Accuracy | 0.52% | | Home Location Accuracy | ±1.0 µm | | Homing Repeatability | ±1.0 µm | | Weight | 0.134 kg | | Travel Range | 25 mm |
*At 2.6 mm/sec velocity ripple and distortion of the acceleration/deceleration profile may occur. For improved control, the max velocity should be limited to 2.3 mm/sec. Features- Compact 12 VDC Servo Actuator
- Sub-micron Resolution
- 2.3 mm/sec Maximum Velocity
- Drop In Replacement for Most 25 mm Manual Actuators
- Compatible with 3/8" barrel-Fitting Stages and Mounts
- Limit Switches for Zero Datum and Actuator Protection
- Also Available in 6 mm and 12 mm Travel Versions
Our Z8 Series Motorized Actuators are engineered for use with optical positioning devices. They offer high resolution in a lightweight, compact package, which makes these actuators ideally suited for demanding optical laboratory automation applications. The Z825B delivers 25 mm of travel and has been designed as a replacement for the Z725 motor. Commercial limit switches have been added to provide overdrive protection and accurate home positioning. The motor in the Z8 provides higher torque than the Z7, allowing the gearbox ratio to be reduced and increasing the motion velocity to 2.3 mm/s compared to 0.4 mm/s for the Z7. The precision of the encoder is higher (512 counts per rev instead of 48) which compensates for the gearbox reduction making the minimum resolution 29 nm . The Z825B has been designed specifically to replace the manual adjusters in stages and mirror mounts that have a 3/8" barrel clamp (e.g., the 1" micrometer in our PT Series Translation Stages). Simply remove the existing manual adjuster from the mount, and fit the replacement Z8 Actuator. The photo below shows a PT3 three-axis stage with a Z825B fitted to one of the axes. The units are shipped with 1.6' (0.5 m) of cable. A 2.5 m (8 ft) extension cable (PAA632) is available separately. For applications with different travel requirements, please see our
6 mm Z806 and12 mm Z812actuators. We also offer the Z825BV vacuum-compatible version, which is rated for use down to 10-6 torr and is shipped with a 1.6' (0.5 m) flat ribbon cable, IDC connector and a converter cable for use with our TDC001 controller. See below for more details. The TDC001 DC Servo Controller is the ideal driver for the Z8 series actuators. Please note that older TDC001 units will require a firmware upgrade to V1.0.10 or later, before they can be used with the Z8 series motors. An upgrade is included with the latest APTServer software, which can be downloaded here.
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How to Calculate the Linear Displacement per Encoder CountFor the Z825, there are 512 encoder counts per revolution of the motor. The output shaft of the motor goes into a 67:1 planetary gear head. This requires the motor to rotate 67 times to rotate the 1.0 mm pitch lead screw one revolution. The end result is the lead screw advances by 1.0 mm. The linear displacement of the actuator per encoder count is given by 512 x 67 = 34,304 encoder counts per revolution of the lead screw, whereas the linear displacement of the lead screw per encoder count is given by 1.0 mm / 34,304 counts = 2.9 x 10-5 mm (29 nm).
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Connector Pin Out| Pin | Description | Pin | Description |
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| 1 | Ground (Limit and Vcc) | 8 | Reserved For Future Use | | 2 | Forward Limit | 9 | Ident Resistor | | 3 | Reverse Limit | 10 | Vcc (5 V DC) | | 4 | Reserved For Future Use | 11 | Encoder Channel A | | 5 | Motor (-) | 12 | Reserved For Future Use | | 6 | Reserved For Future Use | 13 | Encoder Channel B | | 7 | Motor (+) | 14, 15 | Reserved For Future Use |
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Features- Compact 12 VDC Servo Actuator
- Sub-micron Resolution
- 2.3 mm/sec Maximum Velocity
- Drop In Replacement for Most 12 mm Manual Actuators
- Compatible with 3/8" barrel-Fitting Stages and Mounts
- Limit Switches for Zero Datum and Actuator Protection
- Rated Down To 10-6 Torr.
- Also Available in 6 mm and 12 mm Travel Versions
| Specifications | Value |
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| Vacuum Rating | 10-6 Torr | | Bidirectional Repeatability | <1.5 µm | | Backlash | <8 µm | | Maximum Acceleration | 4 mm/sec2 | | Maximum Velocity* | 2.6 mm/sec | | Velocity Stability | ±0.125 mm/sec | | Max Vertical Load Capacity | 4.5 kg | | Max Horizontal Load Capacity | 9 kg | | Recommended Horizontal Load Capacity | <7.5 kg | | Recommended Vertical Load Capacity | <4.0 kg | | Min Achievable Incremental Movement | 0.05 µm | | Min Repeatable Incremental Movement | 0.2 µm | | Absolute On-axis Accuracy | 130 µm | | Max Percentage Accuracy | 0.52% | | Home Location Accuracy | <2 µm | | Homing Repeatability | ±1.0 µm | | Operating Temperature Range | 41° to 104° F
(5° to 40° C) | | Max Motor Coil Temperature | 85 °C | | Limit Switch Life Time | >100,000 Cycles | | Weight | 0.134 kg | | Travel Range | 25.0 mm |
*At 2.6 mm/sec velocity ripple and distortion of the acceleration/deceleration profile may occur. For improved control, the max velocity should be limited to 2.3 mm/sec. The Z825BV offers all the features and specifications of the Z825B described above, together with vacuum compatibility. These motors feature vacuum rated servo motors, a phosphorus bronze internal coupling mechanism and mounting bush, and high vacuum grease. They are rated for use down to 10-6 torr and are shipped with a 1.6' (0.5 m) vacuum compatible flat ribbon cable with IDC connector. This cable has a 0.05" (1.27 mm) pitch, 28 AWG stranded conductors and Fluorinated Ethylene Propylene (FEP) insulation.
A converter cable for use with the TDC001 controller is also supplied but this is not vacuum compatible and should only be used outside the chamber. The Z825BV has been designed specifically to replace the manual adjusters in stages and mirror mounts that have a 3/8" barrel clamp (e.g., the 1" micrometer in our PT Series Translation Stages). Simply remove the existing manual adjuster from the mount, and fit the replacement Z8 Actuator The photo below shows a Z825BV fitted to a custom vacuum compatible PT1 stage. For custom vacuum compatible stages, please contact tech support. 
For applications with different travel requirements, please see our 6 mm Z806V and 12 mm Z812V and Z812BV actuators. The TDC001 DC Servo Controller is the ideal driver for the Z8 and Z6 series actuators. Please note that older TDC001 units will require a firmware upgrade to V1.0.10 or later, before they can be used with the Z8 series motors. An upgrade is included with the latest APTServer software, which can be downloaded here.
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How to Calculate the Linear Displacement per Encoder CountFor the Z806, there are 512 encoder counts per revolution of the motor. The output shaft of the motor goes into a 67:1 planetary gear head. This requires the motor to rotate 67 times to rotate the 1.0 mm pitch lead screw one revolution. The end result is the lead screw advances by 1.0 mm. The linear displacement of the actuator per encoder count is given by 512 x 67 = 34,304 encoder counts per revolution of the lead screw, whereas the linear displacement of the lead screw per encoder count is given by 1.0 mm / 34,304 counts = 2.9 x 10-5 mm (29 nm).
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Connector Pin Out| Pin | Description | Pin | Description |
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| 1 | Motor (+ ve) (12 V) | 6 | Motor (-ve) (12 V) | | 2 | Vcc (5 V) | 7 | Limit Ground | | 3 | Encoder Channel A | 8 | Reverse Limit | | 4 | Encoder Channel B | 9 | Forward Limit | | 5 | Ground | 10 | Reserved for Future Use |
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Features- 1.5 cc Syringe of Apiezon 100 Grease
- Convenient, Inexpensive Package that Reduces Waste
- Prolongs Lifetime of Actuator
- Ready to Dispense
- Vacuum Compatible to 10-9 Torr
This Apiezon grease has excellent anti-sieze properties. It contains PTFE for maximum lubricity and is ideal for re-lubricating the lead screw threads of our ZST and Z8 series actuators described above. It is supplied in a syringe for easy application and is recommended both for general use and for vacuum applications down to 10-9 Torr. It has an optimal working range of 10 to 30 °C (50 to 86 °F). Note: It is recommended that the lead screws of the Z8 and ZST motors are lubricated every 50,000 cycles or 6 months, whichever comes first.
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1" (25 mm) Travel
