Voron V2.4 Belt Path Diagram and Tension Guide
V2.4 Mechanical 搭建
Voron V2.4 的皮带系统是其运动系统的核心。正确的皮带布线、张紧和对齐对于实现 V2.4 著称的打印质量至关重要。本指南涵盖您所需的一切:皮带类型、按构建尺寸划分的精确长度、布线图、使用 Hz 方法的张力目标值,以及常见皮带路径错误的故障排除。
皮带类型与规格
Voron V2.4 使用 GT2 齿形同步带。根据构建目标,有两种常见选择:
- GT2-6mm(标准): The default specification for all V2.4 builds. 6mm wide, fiber-reinforced neoprene or polyurethane. Suitable for normal printing speeds up to 150-200mm/s with reasonable accelerations.
- GT2-9mm(升级): Used in high-speed or high-acceleration builds. The wider belt reduces belt stretch and resonance at the cost of slightly higher moving mass on the gantry. Requires 9mm-compatible pulleys and idlers — you cannot mix 6mm and 9mm components.
For most builders, starting with 6mm皮带 is the right call. Move to 9mm only if you are running a lightweight toolhead (Stealthburner with CW2, or a Bowden-based setup) and pushing accelerations above 8000mm/s2.
按构建尺寸划分的皮带长度
V2.4 有三种标准构建尺寸。皮带长度在不同尺寸间差异显著。始终将皮带剪得比所需稍长——您可以修剪多余部分,但无法添加材料。
250mm 构建
- X轴(龙门架):约1500mm 总长(每侧750mm)
- Y轴(运动系统):约2000mm 总长(每侧1000mm)
300mm 构建
- X轴(龙门架):约1800mm 总长(每侧900mm)
- Y轴(运动系统):约2500mm 总长(每侧1250mm)
350mm 构建
- X轴(龙门架):约2000mm 总长(每侧1000mm)
- Y轴(运动系统):约2700mm 总长(每侧1350mm)
这些是近似值。在裁剪前,务必用绳子或柔性卷尺测量实际皮带路径。精确长度取决于您的电机安装位置、惰轮位置和张紧系统设置。
皮带路径布线
V2.4 在 X 轴和 Y 轴上均采用闭环皮带配置。每个轴都有自己的皮带环,环绕电机滑轮,穿过龙门架,并通过惰轮返回。
X 轴(龙门架)布线
X 轴皮带驱动工具头托架沿龙门架横梁左右移动。皮带从安装在龙门架左后角的 X 电机开始。它向前布线至龙门架前惰轮,环绕后返回工具头托架(在此处夹紧),然后返回电机滑轮。齿面始终朝向滑轮。
Y 轴(运动系统)布线
V2.4 使用两条 Y 皮带——框架两侧各一条——通过一根轴由单个 Y 电机驱动。Y 电机安装在框架后部中央。轴向左和向右延伸,每端驱动一个滑轮。从每个滑轮开始,皮带沿型材向前布线,环绕前惰轮,沿型材底部返回,并循环回滑轮。龙门架夹紧在每条 Y 皮带的上段。
皮带方向与滑轮对齐
皮带方向简单但容易出错:齿面必须朝向滑轮。光滑的背面应接触任何平面或轴承惰轮。一个常见错误是将皮带齿面安装在光滑惰轮轴承上——这会导致噪音、振动和加速磨损。
滑轮对齐检查清单
- 电机同步轮: Must be parallel to the extrusion face. Use a machinist square or digital caliper to verify the pulley face is not tilted. A misaligned motor pulley will cause the belt to ride to one side and rub against the flange.
- 惰轮: Should spin freely with no axial play. The belt should sit centered on the idler bearing. If the belt rides to one edge, shim the idler mount with washers.
- 龙门同步轮: On the X-axis, the gantry-mounted pulleys must be coplanar — any twist will introduce uneven tension and cause the toolhead to bind during travel.
快速对齐测试:手动将工具头或龙门架移动至其完整运动范围。皮带应一致地跟踪,不会摩擦滑轮法兰或型材边缘。
按构建尺寸划分的张力目标值(Hz 方法)
在V2.4上设置皮带张力最可靠的方法是频率(Hz)法。像拨动吉他弦一样拨动皮带,使用智能手机应用(如Gates Sonic Tension Meter或任何频率分析仪)测量共振频率。
Target frequencies for a 300mm构建 with6mm belts:
- X-axis: 100-120 Hz
- Y-axis: 110-130 Hz
For 250mm构建, reduce targets by approximately 5-10 Hz due to the shorter belt span. For 350mm构建, increase targets by about 5-10 Hz. Larger spans need slightly higher tension to achieve the same stiffness.
If using 9mm皮带, multiply the frequency targets by approximately 1.15 — the wider belt is stiffer and resonates at a higher frequency at equivalent tension.
常见皮带路径错误
- 皮带摩擦型材边缘: The most common issue. If the belt contacts the sharp edge of a 2020 or 2040 extrusion, it will fray quickly. Add a printed belt guard or reposition the belt path with spacers.
- 皮带在惰轮处扭转90度: The belt must enter and exit each idler in the same plane. A twist introduces torsion that causes uneven wear and can shed belt dust into the motion system.
- 皮带路径未与框架平行: The belt run between pulleys should be parallel to the extrusion it runs alongside. A diagonal belt path puts side loads on the gantry and causes binding.
- 皮带长度不一致(Y轴): The left and right Y belts must be the same length. Unequal lengths cause the gantry to rack (twist) as it moves forward and back. Always cut both Y belts at the same time from the same spool.
皮带磨损迹象与更换
即使完美对齐,皮带也会随时间磨损。每打印500小时检查一次皮带。出现以下任一情况时需更换:
- 边缘磨损起毛: Loose fibers along the belt edge indicate rubbing or misalignment.
- 齿面松散纤维: The tooth surface should be clean and crisp. Fuzzy teeth mean the belt is wearing against the pulleys.
- 扁平点或釉化: Shiny, smooth patches on the teeth indicate slipping or overheating.
- 皮带背面裂纹: Usually caused by running the belt over too-small idler pulleys (below the minimum bend radius).
更换间隔: Every 2000-3000 print hours for standard GT2-6mm belts under normal use. High-speed or high-acceleration builds may need replacement as often as every 1000-1500 hours. Always replace belts in pairs (both X and both Y) together.
皮带张紧步骤
- 将工具头移至构建体积中心,以均衡每个皮带环两侧的张力。
- 稍微松开电机安装螺栓——刚好足以让电机在其安装槽中滑动。
- 通过将电机拉离皮带路径来施加张力。使用均匀的压力——不要一侧比另一侧用力更猛。
- 对于 Y 轴皮带,两侧施加相同张力。一侧更紧的龙门架会扭曲并导致层移。
- 拧紧电机安装螺栓时保持张力。如有扭矩扳手请使用——M3电机安装螺栓的典型扭矩为1.5-2.0 Nm。
- 使用Hz方法检查张力。在最长自由跨距的中点拨动皮带。
- 调整并重复操作,直至频率处于目标范围内。
- 张紧后,执行完整的Y轴和X轴运动范围检查。倾听是否有摩擦声、咔嗒声或卡滞现象。
维护计划
- 每100小时: Quick visual inspection. Look for belt dust, rubbing marks, or fraying. Pluck to check tension.
- 每500小时: Full inspection. Clean belts with isopropyl alcohol and a lint-free cloth. Check all pulley set screws.
- 每1000小时: Remove belts and inspect thoroughly for hidden wear. Check idler bearings for smooth rotation.
- 每2000-3000小时: Replace belts regardless of visible condition. Belts fatigue internally even if they look fine.
维护良好的皮带系统是V2.4能月复一月打印出精美作品,还是逐渐产生劣质结果的关键区别。在构建时花时间确保皮带路径正确,并持续做好维护——你的打印质量会因此受益。