VID29 Series Data Sheet - Guy Carpenter

DESCRIPTION 

VID29 Series Stepper Motor 

© 2006 Data Instrumentation Technology Limited. 

Email: vid.info@wellgain.com | Website: www.vid.wellgain.com 

Type:VID29-XX/XXP 

Revision:1 

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VID29-XX and VID29-XXP series is a precise stepping motor of patent design, with gear 

reduction ratio 180/1, mainly used in dashboard instrumentation or other digital indicator 

equipments, to transfer digital signals directly and accurately to analog display output. 

Driven by 2 sequent logic pulse signals in 5V-10V, the output shaft can reach stepping angle 

resolution 1/12°. The angular speed can reach more than 500Hz. 

The new and modern design makes high efficiency, high position accuracy and extremely robust 

gear system. The special gear shape is helpful to decrease friction and noise. It chooses special 

material for each component to increase liability and safety for the motor. 

FEATURES 

- Wide working voltage: 5~10V. 

- Low current consumption: less than20mA, 5V, 2X100mW. 

- Wide working temperature: -40~105℃. 

- Extremely robust construction: Ф30mm X 7.6mm. 

- High μ-step resolution: 1/12°. 

- Directly driven by a μ-controller. 

TYPICAL APPLICATION 

signals CPU 

motor 

driving 

circuit 

0 

10 

20 

display 

perfect combination of digital accuracy and analog facility 

30

STEP DEFINITION AND ROTOR MOVEMENT 




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VID29-XX and VID29-XXP series motor are driven by 2 sequent logic pulse singnals. Its work 

diagram is as following: 

Pulse sequence 

Full 180 。 

U L 

U R 

Partial 60 。 

+5V 

0 

-5V 

+5V 

0 

-5V 

1 2 3 4 5 6 1 2 3 4 5 

micro 15 。 

Full Step Partial Step 

One cycle 

Gear ratio 1/180 

UL 

1 

2 3 

Rotor Gears Motor Output 

In order to make motor run more stable and decrease the noise, micro stepping technology is 

recommended. The micro pulse sequence which is more precise and near to sine wave, which 

could drive motor with 1/12º micro step of the pointer. The diagram is as following: 

Pulse sequence 

Voltage in 

coil 

+5V 

0 

-5V 

1 2 3 4 5 6 1 2 3 4 5 

Full Step Partial Step 

One cycle 

4 

UR 

Micro Step 

For more details about the micro stepping driving signals, please see specified files.

ABSOLUTE MAXIMUM RATINGS 

Driving voltage (Ub)..............…………………………...........10V 

EMI tolerance (1 kHz;AM 80%; 100 kHz - 2 GHz) ....….......80 V/m 

Solder temperature (10 sec).........………………....... ....... ...260ºC 




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ELECTRICAL AND MECHANICAL CHARACTERISTICS 

Tamb=25ºC, In micro step mode @ Max. voltage 4.2V, unless other specified. 

Parameter Symbol Test Conditions Min. Typ. Max Units 

Electrical Characteristics 

Operating Temperature Ta -40 105 ºC 

Coil Resistance Rb 260 280 300 Ω 

Operating Current Im fa=200Hz 15 20 mA 

Start-Stop Frequency fss JL=0.2x10 -6 kgm 2 125 Hz 

Maximum Driving 

Frequency 

Mechanical Characteristics 

fmm JL=0.2x10 -6 kgm 2 600 Hz 

Dynamic Torque M200 

fa=200Hz 1.0 1.2 1.4 MNm 

M400 

fa=400Hz 0.7 0.85 1.0 mNm 

Static Torque Ms Ub=5V 3.5 4.0 mNm 

Equivalent Motor Inertia 

@ Output 

Jm 

4.225 

E-7 

Gear ratio 180 :1 

Kgm 2 

Step size in full step mode 1 Degree 

Step size in partial step 

mode 

Step size in micro step 

mode 

Noise 

Others 

1/3 Degree 

1/12 Degree 

Backlash 0.5 1.0 Degree 

Noise Level 

SPL 

@ 100 °/sec 

@ 200 °/sec 

@ 400 °/sec 

34 

41 

44 

dBA 

dBA 

dBA 

Angle of Rotation fl Motors with internal 315 Degree

Force allowed on the 

pointer shaft: 

Axial force (push) 

Axial force (pull) 

Perpendicular force 

Imposed acceleration 

Fa 

Fa 

Fq 

Note: fa – full-step frequency JL – Load inertia 

Stop 

TYPICAL TORQUE AND NOISE 

Torque in micro step driving mode, @ Max voltage Ub= 4.2V 

Noise in micro step driving mode, @ Max voltage Ub= 4.2V 



αp 


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Unit: Unm. 

150 

70 

12 

1000 

Unit: dB. 

N 

N 

N 

Rad/s2

PIN CONNECTION 

Schematic 

Schematic 

SUGGESTED INSTALLATION 




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The VID29 can be easily installed. The four contact pins can be soldered on PCB circuits. If the 

application is subject in very strong vibrations, screws might be necessary. 

Installation Diagram 

VID29-XX Pin Connection 

4 

3 

Front Mount 

VID29-XXP Pin Connection 

1 

2 

Front Mount 

1 

2 

4 

3 

4 

3 

1 

2 

Rear Mount 

Rear Mount 

1 

2 

4 

3

APPLICATION HINT 




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The parameter of the pointer: 

Min Typical Suggested 

MaxValue(*) 

Size: 50mm 80mm 

Weight: 2.5g 10g 

Inertia moment: −7 

2 

2× 10 kgm 

20× 10 kgm 

−7 

2 

Unbalance: 0.01mNm 0.025mNm 

DRIVING PULSE AND CONTROL CIRCUIT 

Partial-Step Driving Mode 

In partial-step driving mode, the motor can be directly driven by a standard logic voltage level with 

less than 20mA current consumption. The bit-time sequence determines the turning direction of 

the motor. The time sequence diagram is as following: 

Driving Pulse in Partial Mode 

Bit Map 

Contact 1 

Contact 2,3 

Contact 4 

Coil Voltage U L 

Coil Voltage U R 

1 

0 

1 

0 

1 

0 

Pulse Sequence 

0 

0 

1 2 3 4 5 6 1 2 3 4 5 

1 

2 

4 

3 

Clockwise (for VID29_xxP) 

Counterclockwise (for VID29_xx) 

Counterclockwise (for VID29_xxP) 

Clockwise (for VID29_xx) 

U L 

U L 

VID29_xxP 

VID29_xx 

U R 

U R 

4 

3 

1 

2

Driving Diagram in Partial Mode 

VDD 

GND 

U L 

μ-Step Driving Mode 

1 2 3 4 



U R 


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In μ-step driving mode, the motor can be driven by a current-level sequence. A μ-step is a 0.083º 

of pointer. The driving pulses consist of many different current level pulse sequences. The μ-step 

provides the pointer shaft continuous, smooth movement. 

Example of driving Pulses in μ-step Mode 

Pulse () i 

Pulse ( i+ 4) 

20 

16.67 

13.33 

10 

6.67 

3.33 

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 

3.33 

6.67 

-Step1 

-Step2 

10 

13.33 

16.67 

20 

Step6 Step5 

Step4 

Drivering pulse for micro-step(Current amplitude=16.07mA) 

Step3 

Current Left in the left coil 

Current 

Right 

in the right coil 

Step2 

Step1 

-Step3 

i 

-Step4 

-Step5 -Step6 

In general the peak amplitude should be between 12.9mA and 16.07mA.

1 

2 

U L 

VID29_××P 

U R 

ACCELERATION PROCESS 

4 

3 

Clockwise( VID29_××P) 

CounterClockwise(VID29_××) 

CounterClockwise(VID29_××P) 

Clockwise(VID29_××) 



4 

3 

U L 


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VID29_xx 

In most of the VID29-XX applications, the angular range of the instrument dial is less than 300°. 

This allows to using mechanical stop to define the zero position. Generally the pointer will be 

reset to the zero position at each time power-up process. 

In power-up process, to quickly drive the pointer onto his initial stop position without creating 

visible and audible jitter of the pointer, we suggest a frequency acceleration process to speed 

up VID29 step motor till a high speed. Below is an example: 

100000 

80000 

60000 

40000 

20000 

speed of rotor 

deg/sec 

500 

400 

300 

200 

100 

speed of 

pointer 

deg/sec 

Acceleration phase 

Star-stop frequency 

10 20 30 40 50 60 

5 10 15 20 25 30 

1000 3000 4000 6000 

Final speed 

U R 

1 

2 

Time (ms) 

angle of pointer 

angle of rotor

RELIABILITY TEST 

Temperature Cycle Test 

- Low Temperature: -40°C±2°C 

- High Temperature: +105°C±2°C 

- Dwell time: each for 1 Hrs 

- Transfer Time: 1.5 hrs 

- Cycle times: 50 cycles total 300hrs 

- Cycle mode: see right graph.. 

- Motor Status: running 

- Reference standard: IEC60068-2-14. 

Thermal Shock Test 

- Low Temperature: -40°C±2°C 

- High Temperature: +105°C±2°C 

- Dwell time: each for 0.5hrs 

- Transfer Time: within 30s 

- Cycle:100 Cycles total 100hrs 

- Motor Status: non-running 


Humidity Test 

- Temperature:+65°C±2°C 

- Humidity:95±2%RH 

- Duration:144 Hrs 



High Temperature Test 

- Temperature: +105°C±2°C 

- Duration:168 Hrs 



Low Temperature Test 

- Temperature: -40°C±2°C 

- Duration: 48 Hrs 






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Mechanical Vibration Test 

- Pulse shape: sine pulse form 

- Range of frequency: 10Hz~ 

200Hz(logarithm sweep) 

- Sweep cycle: 300 sec. 

- Direction: X,Y axis 

- Duration:8 hrs /each Direction 

- Acceleration: 6 g 


- Reference standard: IEC60068-2-6 

Mechanical Shocking Test 

- Height: 1.2 m 

- Direction: X/Y 


- Reference standard: IEC68-2-62

PACKING SKETCH MAP 

Tray for 100 stepper motors VID29 

Material : PP 

Weight : Tray 

1x210g=210g 

Motors 100x7g=700g 

Total = 910g 

Stack for 1000 motors VID29: 

Material : 11Trays (including Cover) 

strappedtogether with plastic band 

Weight : Trays 10x910g=9100g 

Cover tray 1x210g=210g 

Plastic strap 2x15g=30g 

Total = 9340g 

Master-carton for 1000 motors VID29: 

Material : cardboard 710g/m 

Weight : Master-carton 1x900g=900g 

PE bag 2x50g=100g 

Production 1x9340g=9340g 

PE 4x60g=240g 

Total 10580g 

A cardboard of motors 10580g 

Plastic strap 2x15g=30g 

Total 10620g 




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VID29 Series Data Sheet - Guy Carpenter

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