# MaalonDrive® HighAcc 8mm – Type 1

The MaalonDrive® HighAcc 8mm – type 1 micro servo actuator is driven by a DC motor with rated voltage of 12V and integrated encoder with a resolution of 100 pulses per rotation.

Exceptionally dynamic and yet absolutely reliable, the micro positioning system is equipped with a zero-backlash MaalonDrive® gear with reduction ratio of 160:1.

By means of the preloaded ball bearings on the output shaft, the customer application can be directly connected.

### Benefits

1) High repeatability

2) Lifetime lubrication

3) Preloaded ball bearing

4) Easy controllability

5) Zero backlash with optimised fit between speed and resolution

### Technical parameters

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.

**Nr.**

**Parameter**

**Symbol**

**Value**

**Properties**

P-003

Ratio

i

160 : 1

P-004

Self-locking

ja

P-008

Repeatability unidirectional

15 arcsec

P-009

Repeatability bidirectional

20 arcmin

P-010

Accuracy

14 arcmin

P-011

Transmission accuracy

28 arcmin

P-012

Resolution

0.0225 °

P-013

Torsional stiffness

2.29

^{Nm}/_{rad}
P-014

Lost motion

15 arcmin

P-015

Backlash

0 arcmin

P-016

Rated torque

T

3 mNm

P-017

Peak torque

T

6 mNm

P-018

Momentary peak torque

T

20 mNm

P-021

Rated input speed

n

10000 rpm

P-022

Maximum input speed

n

23000 rpm

P-023

Rated output speed

n

62.5 rpm

P-024

Maximum output speed

n

143.75 rpm

P-026

No-load starting torque

T

45 μNm

P-027

No-load running torque

T

30 μNm

P-028

Rated running torque

T

345 μNm

P-034

Lifetime for rated operation

500 h

P-035

Radial backlash output shaft

0 μm

P-036

Axial backlash output shaft

0 μm

P-037

Radial stiffness

c

0.87 N/μm

P-038

Axial stiffness

c

18.5

^{N}/_{μm}
P-039

Max. radial load on output shaft (non-operating, constant load)

F

20 N

P-040

Max. radial load on output shaft (non-operating, impulsive load)

F

5 N

P-041

Max. radial load on output shaft (operating, constant load)

F

3 N

P-042

Max. radial load on output shaft (operating, impulsive load)

F

3 N

P-043

Max. axial load on output shaft (non-operating, constant

F

64 N

P-044

Max. axial load on output shaft (non-operating, impulsive load)

F

20 N

P-045

Max. axial load on output shaft (operating, constant load)

F

185 N

P-046

Max. axial load on output shaft (operating, impulsive load)

F

66 N

P-055

Moment of inertia

I

412 * 10

^{-4}gcm^{2}
P-056

Weight

m

7 g

P-057

Min. permissible ambient temperature (non-operating)

T

-20 °C

P-058

Min. permissible ambient temperature (operating)

T

-20 °C

P-059

Max. permissible ambient temperature (non-operating)

T

85 °C

P-060

Max. permissible ambient temperature (operating)

T

65 °C

**Motor data: DC-Motor RE 8 12V 0.5W**

P-100

Motortype

DC

P-102

Maximum speed of motor

n

23000 rpm

P-104

Speed constant of motor

Kn

1340

^{rpm}/_{V}
P-106

Stall torque of motor

T

0.925 mNm

P-107

Torque constant of motor

Km

7.11

^{mNm}/_{A}
P-108

No-load current of motor

I

4.44 mA

P-110

Max. continuous current of motor

I

86.5 mA

P-111

Rated voltage of motor

U

12 V

P-112

Phase resistance of motor

R

92.2 ohm

P-113

Inductance of motor

L

0.606 mH

P-114

Amplitude BEMF of motor

U

0.746 mV/rpm

P-118

Max. coil temperature of motor

T

85 °C

P-119

Thermal resistance of motor between coil and housing

R

_{th1}
22

^{K}/_{W}
P-120

Thermal resistance of motor between housing and air

R

_{th2}
48

^{K}/_{W}
P-121

Thermal time constant of the coil of the motor

τ

_{w1}
2960 ms

P-122

Thermal time constant of the housing of the motor

τ

_{w2}
21300 ms

**Encoder data**

P-201

Impulses per revolution of encoder

100

P-202

Channels of encoder

A, A\, B, B\

P-203

Frequency range of encoder

f

100 kHz

P-204

Operating voltage of encoder

U

5 ±0.2 V

P-206

Output current of encoder

I

5 mA

P-207

Signal/phase shifting of encoder

90±45 °

**Material information**

P-900

RoHS compliant

ja

P-901

Lubrication of output bearing gearbox

Asonic GLY32

P-903

Lubrication of gear component set

Molykote BR 2 plus

P-908

Material of gear component set

NiFe

P-909

Material of output bearing gearbox

1.4108 DIN EN

P-911

Material of bearing motor

Sintered bronze

P-912

Material of gearbox output side

1.4305 DIN EN

P-914

Material of motor housing

Steel, black coated

### Graphs

P-029

P-019