Description of Miniature ball screw
Mechanical specifications:
Diameters: Φ3.00- Φ16.00 mm.
Leads: 0.50, 1.00, 2.00, 2.50, 5.00 mm.
Accuracy: C3, effective travel cumulative error ≈0.008 mm/300 mm.
Nut type: single nut, double nut preloading (P0-P3).
Axial clearance: 0-3μm, can achieve no clearance.
Materials: SUJ2/52100 vacuum quenched, HRC 58–62。
Nut shape: cylindrical, flange, micro compact.
Pre pressure: light pre pressure to heavy pre pressure, matched according to dynamic load conditions.
Maximum lead speed: based on diameter and stroke, typically 0.50-1.00 m/s.
Dynamic load: 50-1,500 N, size dependent.
Lubrication method: Micro lubrication in the oil storage tank, engineers can specify the end oil nozzle.
Additional options: hard chrome plating, neptunium plating, special environment coating, low temperature resistant -40℃.
Miniature ball screw application + performance + compatibility:
Applications:
- High precision instruments: semiconductor handling module, AOI equipment, laser engraving platform.
- Micro machinery: medical micro manipulator arms, micro pump valve mechanisms, laboratory instruments.
- Robot joints: light load six axis, collaborative robot end effector, visual positioning unit.
- High precision transmission: optical focusing module, micro Z-axis, 3C assembly fixture.
Performance:
- C3 grinding level has low cumulative error, which enables long-term positioning deviation to be controlled at the micrometer level.
- Extremely low friction coefficient, and the reverse clearance can be almost zero (achieving repeatable positioning).
- The micro size still maintains high rigidity, suitable for frequent start stop and high cycling.
- Maintain stability and smoothness under extremely low lead, without any jerkiness or micro vibration.
- Low noise rolling structure, suitable for laboratory/medical and other quiet requirements.
- Predictable lifespan, suitable for long-term PM and algorithm compensation.
Compatibility:
- The shaft diameter, lead, and nut shape all support matching international mainstream miniature ball screw specifications.
- The mirror size can be customized according to the structure of the customer’s old model, and can be directly replaced without changing the structure.
- Support combination optimization with linear guides and micro sliders (based on your CAD or 3D stp).
- Materials and coatings can be specified according to engineering requirements for cleanliness, vacuum, and corrosion resistance.
Value of Johoty’s C3 grinding miniature ball screw
Extremely strong non-standard capability: supports ultra-short stroke, irregular nuts, extremely small lead, and special preloading.
Excellent precision stability: Accumulated error control is close to the second-line level of international mainstream brands.
Short delivery time: Regular sizes can be delivered in 10-15 days, while complex customization takes 20-30 days.
Direct engineering docking: providing CAD, material reports, accuracy curves, and life evaluations.
Production in small batches: starting from 1 piece, suitable for research and development, project validation, and scientific experimental equipment.
Cost advantage is obvious: maintaining C3 grinding grade, while the price is significantly lower than international big brands.
Challenges and Solutions of Miniature ball screw
Positioning drift caused by insufficient system rigidity and micro deformation:
Challenges:
Will my micro transmission system experience slight elastic deformation during high-speed start stop or continuous load changes? Will this deformation erode the theoretical accuracy of C3? Causing actual positioning point drift in cantilever or asymmetric load structures?
Johoty’s solutions:
- FEA analysis guided groove optimization: Based on your installation and load, Johoty uses FEA to perform modal and static analysis on the screw shaft and nut. Optimize the contact angle and curvature of the groove to enhance its bending and torsional stiffness.
- Accurate matching and stability of preload force: C3 accuracy depends on precise preload force. Johoty does not provide universal pre tightening. We match you with the most suitable light or medium preload based on your acceleration, load torque, and thermal expectations. By designing the nut structure, it ensures that the pre tightening force is not attenuated, effectively suppressing axial clearance and drift.
Precision instability caused by micro thermal dynamic characteristics:
Challenges:
The miniature ball screw has a small heat capacity, and although the temperature rise caused by frictional heat is not significant, it is sufficient to cause microscopic thermal expansion. Can my C3 accuracy remain consistent between the first working cycle and the 1,000th cycle after the device is started? How to compensate for such errors?
Johoty’s solutions:
- Material pairing and thermal expansion coefficient management: Johoty provides optimized pairing solutions for carburizing steel, stainless steel miniature ball screws, and specific alloy nuts. Match the thermal expansion coefficient of the material to actively reduce the relative displacement caused by temperature rise inside the system. Relieve the thermal error of the miniature ball screw structurally.
- Efficient thermal conductivity and heat sink design: Johoty’s miniature ball screw adopts an integrated heat dissipation design and can be optionally equipped with special thermal grease interfaces. This increases the heat dissipation area and establishes efficient heat conduction. Quickly export frictional heat to the installation base or guide rail. Ensure that the miniature ball screw operates continuously in thermal steady state to ensure long-term accuracy consistency.
Unacceptability of low-frequency vibration and noise in sensitive environments:
Challenges:
My device is used in medical, optical, or laboratory environments and has zero tolerance for vibration and noise. Will the crawling or resonance of the miniature ball screw at low speeds interfere with other precision sensors or processes inside the device?
Johoty’s solutions:
- Ultra-precision machining and harmonic suppression: CNC optical screw grinder, Johoty performs ultra-precision grinding on the screw raceway. Achieve a surface roughness of Ra<0.2μm. This can reduce the motion fluctuations of steel balls in the raceway, suppress vibration and audible noise.
- Dynamic balance and customization: At extremely high speeds, Johoty provides dynamic balance correction for miniature ball screw shafts. At the same time, Johoty can provide non-standard lead design. Help your system avoid inherent resonance frequency points and achieve smooth motion.
Why Choose Johoty’s Miniature ball Screw ?
Choose Johoty’s customized C3 grinding miniature ball screw. Due to its lead accuracy of 0.008mm, it has the ultimate precision and stability. Used for high-end applications, meeting stringent performance requirements and ensuring efficient and long-lasting operation.
Benefits of Johoty’s Miniature ball Screw
Durability and longevity:
Challenges: Many ball screws are prone to wear, increased noise, and decreased accuracy during high load and high-speed operation. This always affect equipment stability and lifespan.
Benefits of Johoty: High quality materials and grinding processes, Johoty’s miniature ball screw has excellent wear resistance and a long service life. Your device can maintain good operation, reduce maintenance and replacement, and save operating costs.
Why choose Johoty? Reduce equipment maintenance and downtime, and improve equipment reliability. Reduce production costs and improve production efficiency. Johoty is the ideal choice to address this challenge.
Low noise and efficient operation:
Challenges: High precision equipment, noise sensitive medical equipment, laboratory instruments, we can’t ignore noise control. Traditional ball screw is prone to excessive friction and noise during operation, which can reduce work efficiency.
Johoty’s benefits: Johoty’s miniature ball screw has precise grinding and optimized design. It can reduce friction and vibration during operation, and lower noise. Smooth operation is particularly suitable for high-end applications with strict noise requirements.
Why choose Johoty? Engineers pay special attention to the quietness and smoothness of equipment operation. Johoty’s low-noise design can meet this requirement. Ensure that the device maintains excellent noise performance while meeting high-precision requirements.
Customization and flexibility:
Challenges: Engineers need to customize their designs based on the work environment or equipment. However, standard products cannot meet the diverse applications.
Benefits of Johoty: Johoty provides flexible customization based on load requirements, space limitations, and work environments. Adjust the design of the miniature ball screw to meet the requirements. Engineers can flexibly adjust product dimensions, axial stiffness, etc. for different working conditions.
Why choose Johoty? With our customization capabilities, engineers can obtain tailored solutions. Avoid the limitations brought by universal standard parts and improve work efficiency.
Accuracy and consistency:
Challenges: In automated or precision equipment that requires precise positioning, traditional products often struggle to meet the requirements due to large fluctuations in accuracy.
benefits of Johoty: Using C3 precision grinding, the lead accuracy is stable at 0.008mm. This ensures stability under high loads and long-term operation, reducing deviations and errors. The precision of mechanical equipment is very high during long-term operation.
Why choose Johoty? Johoty can provide such high-precision lead grinding. There is almost no error in high-precision operations, which helps engineers solve the problem of high-precision control.
Applications of Johoty’s Miniature ball Screw
Microsurgery equipment/medical robot positioning system:
Challenges: Microsurgery tables and robotic arms require extremely high positioning accuracy, good repeatability, low friction, no backlight, and compact structure.
The function of a miniature ball screw: Compared to a regular lead screw or sliding guide rail, a ball screw uses ball circulation to convert rotation into linear displacement. Low friction, high efficiency, precise positioning, and good repeatability.
Johoty’s customization: For medical equipment with limited space and high precision requirements, we provide a miniature ball screw with a diameter<12mm. Lead accuracy~0.008 mm, customizable screw length, nut shape, and lubrication system.
How to solve: High precision + low friction + high repeatability + compact structure makes the equipment extremely stable and controllable every time it is positioned and moved. The intraoperative movement error can be ignored.
Efficiency improvement/cost savings: Reduce repeated calibration and downtime caused by inaccurate positioning. Long lifespan and low wear of ball bearings can reduce maintenance frequency, saving maintenance and calibration costs in the long run.
Advantages: High positioning accuracy + long lifespan + high efficiency + compact structure, suitable for medical grade and high reliability requirements.
Microscope, semiconductor lithography machine, precision optical/microscopic focusing and fine-tuning system:
Challenges: Optical focusing or semiconductor positioning require smooth, repeatable micro adjustments at the micrometer or even sub micrometer level. Traditional sliding/screw mechanisms have friction, instability, susceptibility to shaking, and poor accuracy and repeatability.
The function of miniature ball screw: Ball screw provides rolling contact, low friction, and high mechanical efficiency. Accurately transmit stable rotation and linear changes. Realize subtle, controllable, and repeatable linear/focusing actions.
Johoty’s customization: provides ultra-fine diameter+C3 precision grinding + optional low friction coating and lubrication + customized nuts to fit optical vehicles. Achieve high stability and low backlight.
How to solve: Ensure short distance, small step, seamless, and repeatable focusing or positioning actions. It provides important guarantees for the stability, imaging clarity, and repeatability of optical systems.
Efficiency improvement/cost savings: Reduce retake, refocusing, and alignment time caused by focusing/positioning errors. Improve overall production capacity and yield, reduce scrap rate and debugging time.
Advantages: High precision, high repeatability, low friction, low wear, suitable for optical equipment with limited space, very friendly to the optical or semiconductor industry.
Micro robots, automated micro grasping, assembly equipment:
Challenges: Micro robots or automation equipment require lightweight structure, small size, smooth movement, and accurate positioning. Traditional driving methods are prone to large volume, high friction, and low efficiency.
The function of miniature ball screw: Miniature ball screw provides high mechanical efficiency, low friction, good load bearing capacity, and good positioning repeatability. Very suitable for small automation systems with limited space.
Johoty’s customization: providing small-diameter ball screws that meet project volume requirements, customized nuts, precision grinding, and optional reverse bi-directional (nutation) mechanisms. Implement compact and efficient linear actuation.
How to solve: Miniature ball screw helps robots and automatic assembly equipment achieve high-precision, stable, and repetitive linear motion in extremely small spaces. Improve action accuracy and stability.
Efficiency improvement/cost savings: Compared to sliding or pneumatic solutions, it is more efficient and consumes less energy. No need for frequent lubrication and maintenance, reducing the total lifecycle cost.
Advantages: small size, light weight, high precision, high efficiency, long lifespan. Johoty’s miniature ball screw is perfect for micro automation devices and micro robots.
High end micro CNC, micro machining machine/EDM/micro drilling machine:
Challenges: Micro machining requires extremely high precision and stability. The traditional mechanical transmission method has machining errors caused by thread errors, friction, backlash, and poor repeatability. It will perform poorly in small trips and high speeds.
The function of the miniature ball screw is to serve as a high-precision linear drive, achieving stability, high efficiency, low friction, controllability, and repetitive positioning. Capable of converting rotation into precise linear displacement, suitable for micrometer level machining.
Johoty’s customization: capable of researching micro machining equipment to customize fine diameter and precision grinding ball screws with a lead accuracy of C3. The screw diameter, length, and nut shape are fully customized according to the machine design requirements. Provide long-term lubrication and enclosed structure to reduce pollution and wear.
How to solve: Achieve stable, repeatable, and high rigidity micrometer linear displacement through high-precision driving. Miniature ball screw can effectively improve machining accuracy and consistency.
Efficiency improvement/cost savings: reduce processing errors, defect rates, and rework, and extend equipment lifespan. Shorten the debugging and maintenance cycle, and improve the unit time qualification rate.
Advantages: high rigidity, high precision, low friction, long lifespan, and adaptability to micro machining requirements. The miniature ball screw is very suitable for high-end micro machining machines.
Microscope stage, liquid processing platform, sample positioning system:
Challenges: Requires high-precision and smooth linear and positioning motion. The structure should be compact, low-noise, and have a long lifespan, with high requirements for repeatability and stability. Traditional sliding guides or screws often suffer from friction, wear, positioning errors, and backlash.
The function of a miniature ball screw is to provide high efficiency, low friction, smooth rolling, high repeatability, and the ability to withstand certain pushing and pulling forces. Suitable for precise linear movement in laboratory automation equipment.
Johoty customization: Johoty customizes the screw diameter/length according to the instrument structure, with precision grinding, suitable lubrication/dust-proof design, and nut shape. Balancing space, precision, and lifespan.
How to solve: Ensure accurate, smooth, and vibration free sampling, movement, and positioning every time, and significantly reduce maintenance requirements.
Efficiency improvement/cost savings: Reduce data errors or repeated experiments caused by mechanical errors and jitter. Extend equipment life cycles, reduce maintenance and your device replacement costs.
Advantages: High precision, high reliability, low noise, long lifespan, low maintenance, suitable for laboratory equipment with high requirements for stability and repeatability.
Fine tuning of control surfaces, antenna positioning, and small cabin structure adjustment in aerospace systems:
Challenges: Aerospace equipment requires high reliability, high repeatability, high strength, low friction, and lightweight. Space, weight, and maintenance costs are all very sensitive.
The function of a miniature ball screw is to provide rolling friction, low energy consumption, high mechanical efficiency, high load-bearing capacity, positioning accuracy, and repeatability. It becomes an ideal solution in systems with limited space/weight and high reliability requirements.
Johoty’s customization: Customize miniature ball screws based on aerospace component size limitations. Advanced materials and lubrication/sealing can adapt to vibration, temperature, load, and lifespan requirements.
How to solve: Provide stable, reliable, repeatable, high-precision linear motion. Adapt to changes in vibration, temperature, and load to ensure system performance and lifespan.
Efficiency improvement/cost savings: Reduce maintenance/replacement frequency, lower downtime costs and safety risks caused by mechanical failures. Improve system reliability and lifespan.
Advantages: Balancing lightweight, high strength, high precision, high efficiency, and reliability. Johoty’s miniature ball screw is a reliable transmission solution in aviation/aerospace systems.
Electronic, semiconductor, optical automated assembly lines/precision assembly equipment:
Challenges: Fast assembly line speed, high repeatability, strict positioning requirements, compact space, high stability and lifespan requirements. Ordinary lead screws, cylinders, and small linear motors may not be ideal due to friction, insufficient load, low efficiency, and short lifespan.
The function of the miniature ball screw is to provide high mechanical efficiency, low friction, high load, repeated positioning, and low backlash. Suitable for assembly operations with high frequency, high precision, and small space.
Johoty’s customization: Combining assembly line equipment design, providing miniature ball screws suitable for beat speed and force requirements. Including screw diameter, lead, precision grinding, nut and lubrication scheme, durability design.
How to solve: Ensure accurate, consistent, stable, and fast assembly of each miniature ball screw, and reduce maintenance/downtime frequency.
Efficiency improvement/cost savings: Increase assembly line capacity and yield rate, reduce rework and defective products. Reduce maintenance frequency and extend component lifespan.
Advantages: high efficiency, high precision, high lifespan, adaptability to high-frequency repetitive operations, low maintenance. Suitable for industrial automated assembly lines.
CMM,Coordinate measuring machine, precision scanning table, precision testing/measuring table:
Challenges: Measurement equipment requires extremely high stability, repeated positioning accuracy, low friction, no looseness, and long-term stable operation. Any small backlash, friction, or deformation can lead to measurement errors or repeated deviations.
The function of miniature ball screw: The ball screw provides a smooth, repeatable, low backlash, high rigidity, and high-efficiency linear motion. It is an ideal transmission mechanism for precise translation, positioning, and scanning of measuring equipment.
Johoty’s customization: Customize diameter, lead, length, and precision grinding to C3 for CMM and measuring platforms. Also, provide high rigidity nuts, precision lubrication/sealing, and customized screw end machining to match the design of the measuring platform.
How to solve: Ensure that the measuring table can be repeatedly and stably positioned, moved, and zeroed every time. Eliminating the influence of mechanical errors on measurement results, improving measurement accuracy and reliability.
Efficiency improvement/cost savings: Reduce the time for repeated measurements and recalibration caused by errors, and improve measurement throughput. Reduce maintenance, calibration frequency, and equipment downtime costs.
Advantages: high precision, high repeatability, high rigidity, low backlash, low friction. Meet the stability and accuracy requirements of rigorous measuring equipment.
Advantages of Johoty’s Miniature ball screw
System-level positioning certainty brought by the lead accuracy of miniature ball screw
Engineer’s Challenges:
- Need to achieve μm level positioning within a limited range of travel. In the system error budget, mechanical transmission error is often the largest and most unstable part.
- The servo loop needs to repeatedly compensate for pitch errors, backlash, and stick slip, with a long debugging cycle and difficulty in replicating across different models.
Verifiable advantages of Johoty’s C3 grinding miniature ball screw
- Lead error controlled at 0.008 mm: The cumulative lead error within a specific effective stroke is significantly lower than the C5/C7 level. The mechanical transmission item in the system positioning error budget can be compressed to a smaller proportion.
- Repeated positioning error is more controllable: the combination of grinding stage track and precise pre tightening makes the reverse clearance approach zero. The reverse positioning error mainly comes from servo and encoder, rather than miniature ball screw.
- Interpolation and multi axis synchronization are simpler: when the lead accuracy and linearity of each axis are highly consistent, the control side can use a unified compensation model and parameter library. Reduce the problem of cross axis error asymmetry.
Value to engineers:
- It is easier to close the error budget during the design phase without leaving too much mechanical margin.
- The performance consistency between mass-produced models is higher, reducing the workload of adjusting and calibrating each machine one by one.
- After long-term operation of the system, the attenuation curve of the positioning accuracy of Johoty’s miniature ball screw becomes smoother and more predictable.
Stiffness, dynamic response, and smooth motion of miniature ball screw under miniaturization conditions:
Engineer’s Challenges:
- The equipment is forced to be miniaturized and lightweight, but it still has to withstand high acceleration and frequent start stop. Insufficient stiffness of the shaft system can lead to dynamic tracking errors, vibration, overshoot, and a decrease in the natural frequency of the entire machine.
- When scanning optical, measuring, and life science equipment at low speeds, extremely low speed fluctuations and torque fluctuations are required to avoid motion textures or artifacts.
Advantages brought by the structure and process of miniature ball screw
- High contact stiffness track geometry design: precise control of contact angle and groove shape through grinding processing, and stable elastic contact area formed by rolling elements under pre tension. Maintain sufficient axial stiffness under small diameter conditions.
- Suitable for small diameter pre tightening: Suitable double/single nut pre tightening and pre tightening force can be selected for specific shaft diameter, lead, and load conditions. Achieving an engineering balance between stiffness, friction, and heat generation.
- Low torque fluctuation and low-noise motion: The grinding track and precisely graded ball bearings make the actual rolling pitch error smaller. The torque and speed fluctuations are lower than those of ordinary turning/rolling grade ball screws, which is conducive to smooth movement at ultra-low speeds.
Value to engineers:
- In micro linear actuators, precision platforms, and multi degree of freedom stages, increasing the natural frequency of the system and reducing the settling time after positioning.
- At highway checkpoints Pick&Place、 Reduce the risk of vibration and structural resonance in microfabrication.
- Reduce the interference of mechanical noise on measurement signals during low-speed scanning, exposure, or detection processes.
Engineering flexible customization of dimensions, pre tightening, materials, and surface technology for miniature ball screws
Engineer’s Challenges:
- The actual design space is limited, requiring non-standard lengths, non-standard leads, special end processing, or specific nut shapes.
- Vacuum, cleanroom, high humidity, high corrosiveness, or the need for non-magnetic materials make it difficult to fully match a universal catalog.
- The requirements for lifespan, efficiency, and stiffness vary on different axes and workstations. I hope to configure accurately according to the working conditions, rather than being forced to use standard miniature ball screws.
Advanced features that can be reflected by flexibly customizing the miniature ball screw are:
- Size and lead customization: Supports non-standard shaft diameter, lead, stroke length, and end processing while ensuring C3 accuracy. Easy to integrate directly into existing mechanical structures without the need to add too many intermediate couplings or supports.
- Pre-tightening and backlash control design: Different pre tightening amounts and contact angle combinations can be selected based on the axial load spectrum, operating frequency, and expected lifespan. Each miniature ball screw can operate within a reasonable range of stress and stiffness.
- Material and surface treatment options: Choose the appropriate steel grade, ball bearing material, and coating/surface treatment based on rust resistance, corrosion resistance, low magnetization, and resistance to particle contamination. Meet environmental adaptability while maintaining C3 accuracy.
- Matching design of lubrication and sealing: According to the requirements of stroke, posture, and cleanliness, match the appropriate lubrication scheme and sealing structure. Helps ensure long-term stable operation under high-precision baselines.
Value to engineers:
- Reduce structural compromise, stiffness damage, or unnecessary complex assembly caused by compromise with standard components.
- Realize refined configuration under multiple operating conditions on the same platform, reducing the technical risks of platform based design.
- Improve the replicability and maintainability of new models from miniature ball screw prototypes to mass production.
Predictive advantages of lifespan, reliability, and data-driven traceability of miniature ball screws:
Engineer’s Challenges:
- Clear life indicators L10 and MTBF need to be provided for the entire machine. If the batch consistency of rolling transmission components is poor and the fatigue life distribution is highly dispersed, it will seriously affect the system reliability evaluation.
- In medical, semiconductor, testing and measurement industries, failure modes must be interpretable and traceable in order to be included in risk control and compliance documents.
The advantages of Johoty’s miniature ball screw in this regard:
- The fatigue life stability brought by grinding process: the controllability of track surface roughness, hardening layer depth, and residual stress state is higher. Making the contact stress distribution closer to the theoretical model makes fatigue life prediction more reliable.
- Batch consistency and traceability: Effective production batch management, measurement data recording, and detection of lead errors, stiffness, and preload. Engineers can calculate lifespan and design redundancy based on real data.
- Failure modes are easier to model: the main failures of grinding grade miniature ball screws are mostly concentrated in material fatigue, lubrication failure, and contact damage caused by contamination. Noise, vibration, and precision attenuation trajectories can be monitored and modeled more easily, making them easier to incorporate into predictive maintenance strategies.
Value to engineers:
- It is easier to incorporate the L10 lifespan and failure probability of the miniature ball screw into the overall reliability model, rather than relying on empirical coefficients.
- Clear structured and data supported arguments can be provided in risk assessment and compliance documents.
- A quantifiable foundation has been reserved for subsequent online monitoring, status diagnosis, and predictive maintenance.
FAQ
Engineer’s Challenges:
Miniature ball screws with diameters less than 6.00–12.00 mm often suffer from insufficient torque, stiffness fluctuations, and difficult-to-control radial runout, leading to reduced lifespan and compromised positioning repeatability, posing a persistent challenge for engineers.
Johoty’s Solutions:
- Multi-point contact ball circulation path design enhances the effective load-bearing area.
- Nut—Raceway Matching Angle Optimization Algorithm, Reducing Local Contact Fatigue.
- The C3 grinding process controls the ball circulation clearance to achieve high torque transmission at small sizes.
Results:
- The torsional rigidity is 15–30% higher than that of traditional counterparts of the same diameter.
- Contact fatigue cycles are significantly prolonged, making it suitable for applications such as medical robotic arms, aerospace precision positioning, and other scenarios involving confined spaces + long service life.
Engineer’s Challenges:
In microscopes, optical alignment platforms, or semiconductor inspection systems, repeatability errors are typically not the issue of the first positioning but rather cumulative errors caused by long-term micro-wear. Users are most concerned about parameters appearing excellent initially but drifting after a year of use.
Johoty’s Solutions:
- Control the uniformity of ball level distribution to prevent localized point contact fatigue.
- Ultra-precision grinding spiral trajectory reduces the impact of ball return.
The nut preload force and trajectory angle are co-designed to delay repeated positioning deviations.
Actual Performance:
Rrepeatability error remains stably within the μm range over the long term.
Precision degradation trend curve is linear and predictable, facilitating system-level compensation design.
Values: Engineers no longer need to rely on trial and error or excessive redundancy to confirm the platform’s precision lifecycle.
Engineers’ Challenge:
Issues often arise in high-speed medical imaging equipment, semiconductor handling platforms, and precision inspection machinery. Under conditions of frequent acceleration and deceleration with concentrated heat sources, thermal expansion causes amplified actual positioning deviations in miniature ball screws, making it difficult to ensure consistency between theoretical and measured accuracy.
Johoty’s Solutions:
Johoty employs a C3-grade grinding raceway, micron-level nut preload setting, and a combination of thermally stable steel. Johoty’s miniature ball screw achieves:
- Actual machine maintains a lead error of ≤0.008 mm/300 mm.
- Constant ball trajectory machining process reduces the micro-fluctuations of the raceway. The positioning error of the miniature ball screw does not accumulate with increasing speed.
- Thermal displacement compensation curve is available, and Johoty’s miniature ball screw facilitates software-level temperature correction in the controller.
Results: The positioning accuracy under high-speed operation no longer relies on mechanical compensation but is inherently built into the structural precision of the miniature ball screw.
