Packaging Details
- Unit Type:piece
- Package Weight:0.1kg (0.22lb.)
- Package Size:10cm x 10cm x 10cm (3.94in x 3.94in x 3.94in)
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Product Name: LV 8729 drive module
Send a new design of large heat sink
product manual:
LV8729 driver module, 128 subdivision, in order to meet the needs of customers with high plot motherboard driver needs, and research and development of ultra-quiet plug-in drive module, the use of simpler, is to create a quiet environment for the printer the best choice.
Product Specifications:
Overall dimensions: 1.5mm * 2.0mm (same as A4988 and DRV8825)
Maximum drive current: 1.8A (factory default 0.8A)
Maximum voltage: 36V (usually 12V)
Support subdivision: 1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128;
Product Technology: Four-layer PCB board
Shipping list:LV8729 module * 1, (heatsink + sticker) * 1
Product weight: 5g
Use tips:8729 drive pin is blue on one side, black on the other side, corresponding to the color of the socket on the main board, to improve the user experience.
Features:
1. In 64 subdivision or 128 subdivision can have a good ultra-quiet effect;
2 working voltage: 6V-36V, the recommended voltage is 12V;
3. The maximum current of 1.5A, the default is 0.8A;
Subdivision: 1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128;
5. Must add heat sink, making the heat dissipation betterPlease be sure to match the use of large fan-assisted cooling).
Tip:Please confirm the direction before power on, then reverse will damage the chip
Subdivision setting table:
Motherboard subdivision jumper from left to right are M1, M2, M3. Jumper cap plugged in as High, jumper cap removed as Low, the specific settings as shown below:
After a long period of testing, using the 64 sub-best.
Drive current algorithm and regulation
1. Drive current algorithm: i = Vref / 0.5, the default Vref about 0.4v, so the default current of 0.8A, the maximum current of 1.5A!
2. Vref measures the voltage at Gnd and the middle of the potentiometer as shown below;
3. Be sure not to connect the motor voltage measurement, or easy to burn drive;
4. Measuring voltage should be connected to the power, do not just connect the USB power supply.
5. Adjust the drive potentiometer, be sure to slightly adjust the potentiometer, measured again after the transfer, to avoid the current caused by excessive drive burn;
6. clockwise to increase, counterclockwise to reduce;
LV8729 enhancedCoolingprompt:
To consider the issue of heat, LV8729 uses a four-tier PCB overall cooling,At the same time the chip comes with heat sink, the default 1A drive current, driven by the LV8729 larger subdivision,For 3D printer\`sStable operation, any motor drive module is to take the initiative to heat, such as the installation of fans, hanging cooling bracket, to the motherboard Ben big fan and so on.
The shop uses raspberry pi series electronic components and 3D printer accessories
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