Read this manual thoroughly before use. 儿童 must operate the machine under adult supervision at all times to avoid co接触危险部件，避免受伤。
During operation, keep all body parts away from the ball outlet, friction wheels, co连接杆等旋转部件保持距离，防止高速出球或机械运动造成伤害。
Reserve at least 3 meters of unobstructed space for installation and placement. The floor must be level (calibration with a level is recommended) to avoid trajectory deviation or machine tipping due to tilting.
确保电源接口与机器匹配's rated voltage. Secure the power cable with an anti-trip sleeve to prevent power outages or equipment damage caused by pulling.
Avoid using the machine outdoors in sandy, rainy, or snowy conditions to prevent moisture damage and accelerated compo部件磨损。
If abnormal odors, smoke, or noises occur during operation, immediately press the emergency stop button and disco再连接电源。请由专业nal technicians—do not disassemble it yourself.
After use, always turn off the power switch and unplug the power cord to ensure the machine is fully powered off.
Compo件组装：垂直拉出球斗，将其与定位ning posts on the main body, ensuring a secure fit on all four sides. For machines equipped with a ball collection net, open the latches, slide the net's square holes over the machine head, insert the pins into the support frame, attach the ends of the side nets to the net f框架固定到网球网附近，并用橡皮筋绑紧。
Position Calibration: Normally place the machine at the center of the court b底线能力。's angle until the landing point is accurate.
功率's output plug into the machine's jack, ensuring a tight connection. Co将适配器安全连接到电源插座，并检查线缆无破损或裸露电线。
锁定机器's casters to prevent movement during operation. When moving the machine, lift it gently to avoid dro防止倾倒或碰撞。
Adjust the distance between the serving machine and the court according to training needs. For standard training, maintain a distance that prevents balls from going out of bounds.
功率ntrol panel will turn red, and the mode and position indicators will light up simultaneously. The system loads factory default parameters (upper wheel speed 5.0, lower wheel speed 1.0, serving frequency 50 balls per minute).
Start Serving: After adjusting the desired parameters, press the "On/Pause" button on the control panel. The indicator will turn from red to green, and the machine will start serving. Press "On/Pause" again to pause (indicator returns to red) and press o再次按下即可恢复。
Shutdown Process: First press "On/Pause" to stop serving. After all mechanical parts have completely stopped, turn off the main power switch and unplug the power cord.
发球频率调节（30-99 球/分钟）
Press the "发球频率" button on the control panel. The corresponding digital display will flash. Use the ▲/▼ keys (or rotating knob) to adjust the value—long-pressing allows quick adjustment. A higher value means faster serving.
The system automatically co5 秒后确认参数nds of inactivity, or you can press "发球频率" again to confirm manually. Adjustments are allowed in both running and paused states. Beginners are advised to start with 30-40 balls per minute and gradually increase as they gain proficiency.
旋转与速度调节
旋转选择：在定点或随机模式下，按下“旋转选择”按钮可在上旋与下旋模式间切换（对应nding indicator lights up). The digital display shows the last used speed parameter. Some models support sidespin and mixed spin, with 36 gradient adjustments for spin intensity via multi-position switching.
Speed Adjustment: Press the "Upper Wheel Speed" or "Lower Wheel Speed" button. After the digital display flashes, adjust the value (0.5-9.9 levels) using the keys or knob, with 0.1 increments per level. A higher value indicates faster spin speed. The built-in gyroscope compensates for spin attenuation in real time to ensure serving stability.
发球模式设置
Fixed-Point Mode: Press the "Fixed-Point Mode" button (indicator lights up) and select the landing point using the 1-9 horizontal position keys. Press the "On/Pause" button to start continuous serving to the selected point. This mode is ideal for basic skill refinement and fixed-movement training, allowing users to focus on mastering specific strokes without adjusting to variable landing points.
Random Mode: Press the "Random Mode" button to switch between full-court (middle green light), right half-court (right red light), and left half-court (left red light) options. It supports random landing at 1-9 horizontal points, making it suitable for improving reaction speed and adapting to real-game rhythms by simulating unpredictable oppo连续多拍训练。
Mixed Random Mode: First select either full-court or half-court random mode, then press the "Random Long/Short Ball" button (indicator lights up). After startup, the machine combines horizontal randomness with long/short ball variations, providing advanced tactical training that enhances comprehensive playing abilities and prepares users for complex game scenarios.
Custom Mode: Press the "Custom Mode" button to select Program P1 or P2. Enter fixed-point mode to set speed, frequency, and trajectory parameters, then press the "Edit" button and use the position keys to set up to 32 landing points. Press "Custom Mode" again to save the program. O启动后，发球机按编辑好的轨迹发球，提供个性化训练，针对特定技能突破或定向练习需求定制。
参数设置：使用低速，发球频率 30-40 球/分钟（4-5 秒nds interval), fixed landing points in forehand or backhand comfort zones, and mainly topspin balls to reduce difficulty and build confidence.
Training Content: Focus on fixed-point hitting practice, emphasizing proper backswing, body rotation, and follow-through movements, with a focus on returning to the center line after each hit to maintain positioning. Incorporate small-range moving hitting (1-2 meters left/right landing changes) to practice adjustment steps and footwork coordination. Add alternating forehand and backhand receiving drills to enhance judgment and transition ability between strokes.
参数设置：调至中高速，发球频率 50-70 球/分钟（2-3 秒nds interval), and increase landing point variations along with spin combinations (alternating topspin and backspin) to challenge existing skills and promote growth.
Training Content: Practice line control by hitting cross-court or down-the-line shots to fixed landing points, refining accuracy and shot placement. Focus on depth control, targeting the area within 1 meter of the baseline to develop consistent power and precision. Incorporate "two-point to one-point" and "one-point to two-point" footwork training to improve movement efficiency, and add forward-backward moving hitting (advancing for short balls and retreating for deep balls) to enhance court coverage.
Parameter Settings: Enable full random mode (random speed, spin, and landing points), set the serving frequency to 70-90 balls per minute, and activate the mixed spin function to replicate the complexity of real matches.
训练内容：进行“发球+接发球”模拟练习：自抛发球后回击发球机发出的球's serve, mimicking actual game opening sequences. Practice continuous hitting with random landing points to enhance adaptability and decision-making under pressure. Allocate 70% of training time to targeted weak point training (such as backhand improvement) to address specific deficiencies. For tennis-specific skill development, include net volley and smash practice to strengthen offensive capabilities at the net.
Cleaning: After powering off the machine, wipe the body with a soft dry cloth or a damp cloth with neutral detergent to remove dust and dirt. Regularly clean the friction wheels to eliminate oil contamination, which can reduce friction and affect serving performance. Periodically inspect the ball channel to remove debris and water, ensuring unobstructed ball flow and preventing jams.
Component Replacement: The friction wheels have a service life of approximately 500,000 hits. Replace them promptly if wear or surface smoothness causes weak serving or unstable landing points. Regularly check springs and drive belts for signs of looseness or damage, and repair or replace them as needed to maintain mechanical functionality.
Storage Requirements: For long-term non-use, disassemble and fold the ball collection net to save space. Store the machine in a dry, well-ventilated area, avoiding moisture, direct sunlight, or heavy pressure that could damage components. Power on and run the machine for 5 minutes mo每月进行，防止部件老化，确保重新启用时运行顺畅。
Weak Serving: Possible causes include loose or unstable power connections, over-tightened, worn, or low-tension serving wheels, and blocked ball channels. To resolve this, check and secure the power connection, adjust the serving wheel tension, replace worn wheels, and clear any debris or water from the ball channel.
Unstable Landing Points: This issue may stem from worn or loose friction wheels, tilted machine placement, or unbalanced trajectory adjustment. 地址 it by replacing or adjusting the friction wheels, recalibrating the machine to ensure it is level, and adjusting the base trajectory knob to maintain co两侧高度保持一致。
控制面板红灯闪烁ntrol Panel/Shutdown: Internal malfunctions or blocked pipelines are common causes. Power off the machine and inspect the ball channel to clear obstructions. If the issue persists, co请联系售后服务寻求专业nal inspection and repair.
偶nal Double Ball Discharge: A faulty machine head spring is typically responsible. Have the spring replaced by professional technicians to ensure proper ball feeding and prevent double discharges.
Balls Going Out of Bounds/Netting: Improper distance between the machine and the court or incorrect trajectory adjustment may cause this. Adjust the machine spacing to the appropriate distance and turn the trajectory knob left to increase the ball arc or right to decrease it, depending on the issue.
电源灯亮但控制ntrol Panel Unresponsive: A blown fuse is the most likely cause. Replace the fuse with one of matching specifications to restore control panel functionality.
