VSS Stepper motors in vacuum
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For Applications up to Ultra-high-vacuum Motors for use in vacuum should not only withstand the vacuum (no bursting of air inclusions), they must not contaminate the vacuum either. By selecting suitable materials and optimised conditioning processes phytron VSS/VSH stepper motors are ideally suited for use in a vacuum. Through many years of experience with special materials for use in Space, we have put a focus on materials with minimal molecular outgassing and high heat resistance. This is the prerequisite for a high vacuum quality and genuine measurement results in scientific and medical applications. For exact positioning in vacuum, stepper motors are therefore particularly suitable because they can precisely position even without sensitive feedback providers. Therefore phytron VSS/VSH stepper motors can be used in particularly challenging environmental conditions (radiation, cryo-temperatures and in a modified design even in Space). Since stepper motors do not generate jitter effects while holding a position, this technology is ideal for precisely aligning optical instruments, mirrors, antennas or samples e.g. in high-resolution microscopes, particle accelerators or molecular analysis devices. The VSS/VSH series is completely manufactured in Germany. You have special requirements? We are pleased to develope a tailored design for your application. RoHS complient In Focus High Temperature Radiation Resistance 2-phase stepper motors Holding torques from 3.4 mNm to 13 Nm Diameters from 19 to 125 mm Number of steps 200 (standard) Step accuracy 5% for 1.8° Operating voltage (power stage) Size 19 to 57: 70 VDC Size 80 to 126: 120 VDC • Outgassing holes to avoid pockets of trapped gas Highlights Performance & Lifetime phytron in-Vacuum motors are based on a technology that can also be found in the most challenging projects of our time. From a variety of satellites up to the Mars rover Curiosity: phytron motors drive applications in distant worlds - highly accurate, reliable and durable. Driven within their specification range, high quality components and a proven design make sure: These motors don’t let you down! Cleanliness phytron motors for use in ultra high vacuum (UHV) contain only materials that also meet the requirements of the ECSS (European Space regulations). Thus, each material has a maximum TML (Total Mass Loss) value < 1% and a maximum CVCM (Volatile Mass Losses) value < 0.1 %. You will receive your UHV motor, double-wrapped and vacuum sealed. • VGPL precision planetary gear or Harmonic Drive gear • Thermocouple type KTC/ Pt100 resistor sensor • Resolver • Double shaft Customised solutions • Operating in an agressive environment • Clean room applications to clean room class ISO 5 (acc. to ISO 14644-1) • Motors with spindle Edition 2017 April Extr

Extreme phytron VSS/VSH Stepper Motor Conditioning The combination of high quality materials and a special conditioning process allow minimal outgassing rates. So a vacuum of 10-11 hPa can be achieved depending on the application. For this purpose, individual components of the UHV motors, such as the wound stator, are specially conditioned before installation, so that outgassing materials cannot be deposited in the ball bearings or inside the motor. The fully assembled motor is outgassed by a phytron process at least 200 °C in vacuum chambers. Increased outgassing temperatures are available...

Structure design As is commonly done in high vacuum class all structural elements such as housing, flanges and shafts are made of stainless steel. Outgassing holes in the rear flange also allow rapid evacuation and purging of the motors and make sure that no gas inclusions may occur. All structural elements of the magnetic circuit are basically protected against corrosion. This also allows temporarily handling in normal environment. Handling phytron VSS/VSH motors are primarily designed for use in vacuum. Although the components of the magnetic circuit are basically protected against...

Extreme Configuration guide Duty Cycle Resolution Size / Type Use bigger motor size Use motor with gear Preliminary assessment based on the required torque at max. speed (motor characteristics) and the available installation space. (Note: available voltage limits the max. speed) Select motor size Current > 0.5*IN is only needed for a short time? no Is a full step resolution of 1.8° (200 step motor) enough? (The resolution can be increased by electronic control systems like micro step mode.) Torque at the operating point (max. speed, max. load) at 0.5*IN current (current is proportional to...

Stepper Motor VSS 19 to VSS 57, VSH 80 to VSH 126 Key H I J VSH 80 3 2.5 20 Dimensions / Electrical and Mechanical Characteristics VSS/VSH Standard 200-steps 4 lead parallel3)

Mechanical Characteristics Gear 11 no load 21 center of the shaft 31 in grease-lubricated operation 41 continuous operation 51 applies to FV, HV, UHVG for type reduced backlash 61 applies to FV, HV, UHVG for type low backlash 71 applies to UHVS, UHVC type standard backlash 81 type standard backlash

In comparison to other resolvers with variable differential rotary transformer, the resolvers R02010 and R03620 use a constant air gap. They are less sensitive to eccentricity and magnetic stray fields and can directly be connected to standard resolver-to-digital-(R/D)-converters. The resolver is suitable for the use in ultra high vacuum and cryogenic environment - UHVC2 (4K) class available on request. Kapton leads, 500 mm long Sense of Rotation Positive when CCW seen from leads outlet Ref+ Ref-Cos+ Cos-Sin + Sin- Resolver Specification

Resolver - Encoder Converter The position data converter controls autonomously the resolver sensor and converts the output signals of the resolver to incremental output signals (square wave signal). Resolution: 1024 increments 8 VPP (diff.) Output reference signal: 100 mA max. 10 kHz Input SIN/COS: Resolver transformation factor: Supply voltage: phytron‘s modular phyMOTIONTM controller evaluates the resolver signals directly with the newly developed resolver evaluation module ECMS01. Thermocouple Type K and Resistance Temperature Detektor Pt100 The insulated temperature sensor in phytron...