The linear actuator RasuunDrive® BallScrew 26mm – Type 2 is suitable for very precise positioning applications and offers a maximum travel range of 52 mm. The actuator consists of a stepper motor with encoder, a backlash-free high-reduction-ratio HarmonicDrive gear HFUC-5 and a low-friction ball screw with a diameter of 12mm. Heart of the system is the robust and backlash-free Harmonic Drive® gear with a gear ratio of 100:1. With its 200 steps per revolution and the 500 pulses per revolution offers motor and encoder enough resolution for positioning in the sub-micrometer range. The powerful and backlash-free ball screw with a pitch of 2 mm is directly integrated into the axial, highly rigid bearing of the gearbox output. The spindle bearing consists of 4 tandem X-braced angular contact ball bearings.
1) Flexible integration
2) High axial load capacity
3) Easy controllability
4) Zero backlash with high transmission ratio
5) Step with in the range of nm
The values shown are based on calculations and measurement procedures carried out by Micromotion GmbH, which are carried out according to the current state of the art. Our definitions can be found at www.micromotion-drives.com. For further information please contact sales@micromotion.de.
Properties
x
P-003:The reduction ratio describes the relationship between the input movement and the output movement. With a reduction ratio, the output movement is smaller than the input movement.
Ratio
i
100 : 1
x
P-004:With self-locking, the forces caused by friction are always greater than the applied adjustment forces due to the geometric relationships of the sliding partners. Due to the geometric conditions, the sliding partner in which the force is initiated cannot be moved relative to the sliding parter on which the adjustment force is applied.
Self-locking
nein
x
P-005:The travel range describes the travel range available for the application.
The travel range characteristic describes the characteristic of the travel range as a function of the angular position of the eccentric. It is defined such that at an angular position of 0 degrees, the eccentric is perpendicular to the resulting movement direction and has no deflection in the adjustment direction.
The max. travel range specifies the maximum available travel range of an eccentric kinematics.
Travel range
s
25 mm
x
P-008:The unidirectional repeatability describes the positional uncertainty that arises when repeatedly approaching a setpoint from the same direction with no load.
The repeatability is defined as half of the maximum difference together with a +/- sign.
Repeatability unidirectional
0.3 μm
x
P-012:The positioning resolution refers to the smallest angular change or positional change that can be distinguished by the positioning system.
With eccentric systems, the characteristic of the linearly resulting positioning resolution is described as a function of the angular position and thereby indicates the smallest positional change as a function of the angular position that can be distinguished by the positioning system.
With eccentric systems, it is defined such that at an angular position of 0 degrees, the eccentric is perpendicular to the resulting movement direction.
Resolution
0.1 μm
x
P-013:The torsional stiffness can be ascertained from the characteristic of the hysteresis curve of a gear.
The torsional stiffness is defined as the slope of the hysteresis line and describes the elastic torsional angle of the output shaft as a function of a torque.
The hysteresis curve is determined by subjecting the output to load while the input is blocked with a clockwise and an anticlockwise torque and the corresponding angular displacement measured.
Torsional stiffness
270 Nm/rad
x
P-015:The backlash can be determined from the course of the hysteresis curve of a gear or mechanical transmission system. The backlash is defined as the range in which the course of the hysteresis curve is vertical, i.e. there is a change in angle or position without changing the torque or force. The hysteresis curve is determined by loading the output with a clockwise and counterclockwise torque or force when the drive is blocked and measuring the associated angular torsion.
Backlash
0 μm
x
P-016:Rated torque or rated force is defined as the torque or force at which the service life is achieved under rated conditions, i.e., rated speed.
With drive systems, the motor torque may, in some cases, not be adequate for overcoming the running torque of the complete system under rated conditions.
Rated force
F
646 N
x
P-017:The peak torque or peak force is the loading of the components in the drive train, e.g., the teeth of the gears, still below the fatigue strength.
This does, however, result in increased tooth wear, which leads to a reduction in the service life.
With drive systems, the motor torque may, in some cases, not be adequate for overcoming the running torque of the complete system at peak torque or peak force.
Peak force
F
646 N
x
P-018:The momentary peak torque or momentary peak force describes the maximum permissible torque or force that can act on the actuator. If the momentary peak torque or momentary peak force is exceeded, damage or a reduced life time of the actuator cannot be ruled out. With momentary peak torque or momentary peak force, the elastic deformations of the teeth are still small enough that no tooth meshing problems occur and proper function is ensured. The loads do, however, exceed the limit of the fatigue strength. Thus, the number of loads should be minimised. Should it occur once, breakage or failure will not result. With drive systems, the motor torque may, in some cases, not be adequate for overcoming the running torque of the complete system at momentary peak torque or momentary peak force. In drive systems, the motor torque may not be sufficient to generate enough torque to meet the permissible momentary peak torque or momentary peak force. On the other hand, in drive systems, the existing motor torque can be so high that the drive system can exceed the permissible momentary peak torque or momentary peak force and the drive system can be damaged.
Momentary peak force
F
646 N
x
P-023:Rated output speed or rated speed is defined as the speed at which the service life is achieved under rated conditions, i.e., rated torque or rated force.
With drive systems, the motor torque may, in some cases, not be adequate for overcoming the running torque of the complete system at rated speed.
Rated speed
v
0.66 mm/s
x
P-024:The maximum output speed or maximum speed refers to the speed before which mechanical damages occur to components in the drive train, e.g., scoring of the teeth.
With drive systems, the motor torque may, in some cases, not be adequate for overcoming the running torque of the complete system at maximum speed.
Maximum speed
v
2 mm/s
x
P-034:The service life is defined by means of the rated operating point, i.e., rated speed and rated torque, as well as a change of the accuracy characteristics, i.e., unidirectional repeatability, transmission accuracy, lost motion, of less than 10% of the respective catalogue value.
Lifetime for rated operation
7000 h
x
P-035:The backlash can be determined from the course of the hysteresis curve of a gear or mechanical transmission system. The backlash is defined as the range in which the course of the hysteresis curve is vertical, i.e. there is a change in angle or position without changing the torque or force. The hysteresis curve is determined by loading the output with a clockwise and counterclockwise torque or force when the drive is blocked and measuring the associated angular torsion.
Radial backlash output shaft
0 μm
x
P-036:The backlash can be determined from the course of the hysteresis curve of a gear or mechanical transmission system. The backlash is defined as the range in which the course of the hysteresis curve is vertical, i.e. there is a change in angle or position without changing the torque or force. The hysteresis curve is determined by loading the output with a clockwise and counterclockwise torque or force when the drive is blocked and measuring the associated angular torsion.
Axial backlash output shaft
0 μm
x
P-038:Stiffness of the bearing in the axial direction, i.e., elastic deflection of the mounted shaft in the axial direction as a function of the applied force.
Axial stiffness
c
66.9 N/μm
x
P-044:Max. permissible axial load on the output shaft (not in operation, force applied impulsively)
Describes the maximum permissible axial load on the output shaft, whereby the drive is not in operation, i.e., is at a standstill and the force is applied impulsively. Decisive for the determination is the static load bearing capacity of the ball bearings, which, in the impulsive case, corresponds to just one third of Co, as well as the elastic deformation of the output shaft due to the stiffness of the output bearing and the associated position of the dynamic spline.
Max. axial load on output shaft (non-operating, impulsive load)
F
646 N
x
P-055:The moment of inertia specifies a body’s resistance to change its rotational movement.
Moment of inertia
I
27518.5 * 10-4 gcm2
x
P-056:The weight of the drive without cables and plugs.
Weight
m
371 g
x
P-057:Minimum permissible temperature at which the drive may be stored or decommissioned without being impaired or destroyed as a result.
Min. permissible ambient temperature (non-operating)
T
-30 °C
x
P-058:Minimum permissible temperature at which the drive can be operated.
Min. permissible ambient temperature (operating)
T
-20 °C
x
P-059:Maximum permissible temperature at which the drive may be stored or decommissioned without being impaired or destroyed as a result.
Max. permissible ambient temperature (non-operating)
T
80 °C
x
P-060:Maximum permissible temperature at which the drive can still be operated.
Max. permissible ambient temperature (operating)
T
80 °C
Bearing stiffness
cK
144 N/μm
Motor data: Stepper ZSS 25.200.0.6-4Lp
x
P-102:The maximum speed of the motor describes the speed before mechanical damages occur to the commutator, the rotor or the bearing.
Maximum speed of motor
n
6000 rpm
x
P-105:Describes the torque developed by the motor while at a standstill.
Holding torque of motor (unpowered)
T
2 mNm
x
P-109:The phase current that may flow through both phase coils without the motor overheating while at an ambient temperature of 20°C and constant operation.
Rated current of motor
I
600 mA
x
P-111:The rated voltage corresponds to the voltage at which all other rated characteristic values of the motor, particularly the rated current at 20°C, are set, measured and classified.
Rated voltage of motor
U
70 V
x
P-112:The phase resistance describes the ohmic resistance of the coil of a phase at an ambient temperature of 20°C in the steady state.
Phase resistance of motor
R
3.25 ohm
x
P-113:Describes the inductance of the coil of a phase at an ambient temperature measured at 1 kHz.
Inductance of motor
L
1.5 mH
x
P-115:The full step angle of the motor describes the angle at which the rotor turns if a phase is advanced.
Full step angle of motor
1.8 °
x
P-123:Describes the insulation voltage of the motor.
Insulation voltage of motor
U
700 V
Data limit switch
Configuration Limit switches
n.c.
Spindle data: Ball screw – diameter 12mm, pitch 2mm, travel range 50mm
x
P-406:Stiffness of the ball screw, i.e., elastic deflection spindle nut as a function of the applied force.
Stiffness ball screw
c
125 N/μm
Material information
