VSS Stepper Motor
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VSS Stepper Motor 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 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 RoHS complient In Focus phytron VSS 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 series is completely manufactured in Germany. You have special requirements? We are pleased to develope a tailored design for your application. 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 • Protection class IP 20 • Standard connection: 4-lead parallel (option: series or 8-lead) • Outgassing holes to avoid pockets of trapped gas 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! • VGPL precision planetary gear or Harmonic Drive gear • Thermocouple type KTC/ Pt100 resistor sensor • Resolver • Double shaft 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. 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 2015 April Extreme. Precision. Positioning.

Extreme phytron VSS 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 on...

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 motors are primarily designed for use in vacuum. Although the components of the magnetic circuit are basically protected against corrosion,...

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 torque)?...

Stepper Motor VSS 19 to VSS 126 Lg6 Option: radial J Dimensions / Electrical and Mechanical Characteristics Electrical Characteristics Loads Mass Rotor inertia Detent torque Inductivity/ Phase Resistance/ Phase VSS Standard 200-steps 4 lead 3) parallel Mechanical Characteristics Preferred options: HV and UHVG in small quantities are available from stock Holding torque in bipolar mode with parallel windings, two phases on at rated current 3) other step resolutions on demand (with different mechanical characteristics!) 2) Shaft diamter tolerances: VSS 19 to 26: -0.005 to -0.009; from VSS 32:...

Stepper Motor with VGPL Gear Shaft VPGL 16 22 26 32 Dimensions Dimensions in mm Gear Stepper motor

Mechanical Characteristics Gear back1)5)6)7) lash Stepper motor Axial load Efficiency at full 3) load Gear inertia in grease-lubricated operation short time operation, frequency of the start-stop-movements < 1000 per hour (otherwise please consider the shock factor) applies to FV, HV, UHVG for type reduced backlash applies to FV, HV, UHVG for type low backlash applies to UHVS, UHVC type standard backlash VPGL 16 is applied only for type standard backlash

Stepper Motor with Resolver 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 fine, high and ultra high vacuum. Kapton leads, 500 mm long Sense of Rotation Positive when CCW seen from leads outlet red/white Secondary (Cosine) Primary (Reference) Ref+ Ref– Cos+ Cos– Sin+ Sin– Secondary (Sine) Motor with resolver RO3620...