Setelah sukses melakukan disassembly driver motor bawaan rel kamera, yaitu ZD-8731, kini kita lihat jauh lebih dalam driver motor tersebut. Seperti pada pembahasan sebelumnya, ZD-8731 ini memiliki IC kontrol utama berupa LV8731 dari On Semi. Datasheet LV8731 sendiri dapat dilihat di link berikut.
Fokus bahasan saya pada artikel ini adalah untuk memahami bagaimana ZD-8731 ini bekerja. Tentu saja, kita memerlukan datasheet dari LV8731 dan datasheet dari ZD-8731. Datasheet dari LV8731 dapat diperoleh dan dibaca dengan mudah. Sedangkan, datasheet dari ZD-8731, sudah mencarinya sulit, bahasanya bahasa China lagi –_-. Datasheet ZD-8731 dapat dilihat di link berikut.
Kita mulai saja pembahasan datasheet produk ini. Dengan bantuan google translate, saya dapat menerjemahkan sedikit-sedikit datasheet ini.
- 1. Features
* High integration and high reliability
* Interface with ultra high-speed optocoupler isolation
* Anti-interference ability of high frequency
* Maximum input voltage: DC 36V (peak)
2. The main function
* Full step, two segments, four segments, sixteen segments adjustable
* Automatic overheat protection
* Linearly adjustable output current limit: 0A-2A
* Automatic semi-flow lock
* Short circuit protection
* Supports offline, enable, lock and other functions
3. Working condition
| Parameter | Minimum | Typical | Maximum | Unit |
| Ambient Temperature | -30 | – | 80 | C |
| Input Voltage (DC) | 9 | 24 | 36 | V |
| Input Frequency | 0 | – | 16000 | Hz |
| Output Current | 0 | – | 2 | A |
| Interface Logic High | 4.5 | 5 | 5.5 | V |
| Interface Logic Low | 0 | 0 | 0.5 | V |
4. Interface Definition
DC Power Supply
* Positive Supply
* Negative Supply
Motor Phase Connection
* A+
* A-
* B+
* B-
Controller Interface Connection
* Direction +
* Direction –
* Offline +
* Offline –
* Pulse +
* Pulse –
On/Off Light Indicator
Current Adjustment
Step Divider Adjustment
5. Wiring Method
a. Common Anode (Common Positive)
R limiting resistor in series
* When Voltage Controller is 5V, interface is directly connected without R.
* When Voltage Controller is 12V, interface is connected through 1K resistor in series.
* When Voltage Controller is 24V, interface is connected through 2.7K resistor in series.
Control Mode
Pulse (-) : Pulse is active high. The controller move the stepper motor when there is a pulse otherwise lock the motor. Pulse (-) will take effect when Enable is enabled.
Direction (-) : High means forward direction, Low means reverse direction.
Enable (-) : High means enabled, Low means disabled.
b. Common Cathode (Common Negative)
R limiting resistor in series
* When Voltage Controller is 5V, interface is directly connected without R.
* When Voltage Controller is 12V, interface is connected through 1K resistor in series.
* When Voltage Controller is 24V, interface is connected through 2.7K resistor in series.
Control Mode
Pulse (+) : Pulse is active low. The controller move the stepper motor when there is a pulse otherwise lock the motor. Pulse (+) will take effect when Enable is enabled.
Direction (+) : Low means forward direction, High means reverse direction.
Enable (+) : Low means enabled, High means disabled.
6. Wiring Example
a. CM30L Low Cost Controller
b. Single Axis Controller
7. Stepper Motor Type
8. Division Settings
| Division | SW1 | SW2 |
| 1 | OFF | OFF |
| 2 | ON | OFF |
| 16 | ON | ON |
| 4 | OFF | ON |
9. Offline Settings
S5 ON: Motor 1 and 2 offline.
S5 OFF: Motor 1 offline
10. Current Settings
This drive built-in current adjustment knob. Turn the knob clockwise to achieve the output current 0A-2A linear regulator.
11. Dimensions
12. Frequently Asked Questions
1. Q: The first use of the stepper drive, how to get started as soon as possible? ?
A: Correctly connect the power supply and motor after only take the pulse signal (first frequency to less than 1K), broken down to 16, the direction and offline vacant, then the motor default after power forward. Correct and then run the test in order to accelerate (increase frequency), the direction of subdivision and offline capabilities.
2. Q: What impact reverse power
A: There may burn drive.
3. Q: The control signal is greater than 5V, you must add a series resistor? ?
A: Yes, or they may burn the driver control circuit interface. ?
4. Q: After working long hours drive enclosure is hot, normal? ?
A: Normal, at room temperature 90 degrees lower case does not affect performance. ?
5. Q: After wiring the power indicator light, but the motor does not turn, what is the reason? ?
A: If the wiring is correct, but still does not turn, a control part of the drive capacity is not enough, this happens more often in the mouth with a microcontroller io direct control. Make sure that the control interface with a drive capability of 5mA?
6. Q: How to determine the definition of the stepper motor four lines? ?
A: The motor any two lines together, then hand tighten the motor resistance, then these two lines are in the same phase, which can be accessed in drive A +, A-; the other two lines are still short resistance, it will be two lines connected to the B + and B-?
7. Q: Want to add some function or do new product development on this drive, and if you can? ?
A: Yes, please contact our
Beijing Maria Times Electric Co., Ltd.
Address: Chongwen District Guangming Road 1.3 billion Hing Building 503
Website: http: //www.sdcq-micromotor.com
Tel: 010-67185922
Fax: 010-87197282-807
Fiuh… selesai juga membaca datasheetnya. Setelah ini kita akan membahas interfacing dengan mikrokontroler.
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