Voron Belt Tension Guide — Get Perfect Tension Every Time

校准 Mechanics Belt Tension

Belt tension is the single most impactful mechanical adjustment on any Voron printer. Get it right and your prints will be crisp, dimensionally accurate, and ghost-free. Get it wrong and you'll chase problems — ghosting, layer shifts, VFAs, and even skipped steps — that no amount of software tuning can fix. 最后更新：2025年5月。

本指南涵盖在Voron上设置完美皮带张力所需的一切：推荐方法（频率计、张力计和经典的“拨弦测试”）、每个Voron型号的精确频率目标、逐步调校步骤以及维护计划。无论您是组装新的V0.2还是维护运行多年的V2.4，都能在此找到正确方法。

前提条件： Your printer should be fully assembled with belts installed on the correct pulleys. If you're still in the build phase, see our calibration guide for the full sequence of setup steps.

为什么皮带张力很重要

Voron上的皮带是电机与运动部件之间唯一的机械连接。它们将步进电机的力、位置和加速度指令传递到工具头和龙门架。如果张力不正确，会出现以下问题：

• 过松： Ghosting (ringing) on vertical surfaces, especially near corners. Layer shifts under high acceleration. Dimensional inaccuracy — your printer will "round off" sharp corners. The belt may skip teeth on the pulley during rapid direction changes.
• 过紧： Stepper motor bearing noise and premature wear. Increased friction and drag. Possible stepper driver overheating. Reduced belt lifespan — over-tensioned GT2 belts develop 微裂纹 and fail at the teeth.
• 张力不均（左 vs 右）： Gantry racking on V2.4 — one side leads the other. Skewed prints — rectangles come out as parallelograms. Binding on Z movement on Trident.

The goal is a narrow "goldilocks zone" where the belt is tight enough to transmit force without stretch, but loose enough to allow smooth movement. For Voron printers, this zone is approximately 2-3 N/cm of tension, which corresponds to a specific frequency when the belt is plucked like a guitar string.

方法一：频率计/张力计（最准确）

最可靠的方法是使用专用皮带张力计或频率测量。皮带张力与拨动时皮带共振频率的平方成正比，因此测量频率可得出精确的张力值。

硬件选项

• Gates Sonic Tension Meter（型号 507C）： The gold standard. ~$400 retail — pricey, but common in Voron community tool libraries. Measures frequency and displays tension directly in N/cm or Hz.
• 通用 Klipper 兼容张力计： ~$20 on AliExpress. Plugs into your SBC via USB and uses the BELT_TENSION_GAUGE Klipper macro. Works well, cheaper, and integrates with your Klipper dashboard.
• 智能手机频率分析应用： Free. Apps like "Spectroid" (Android), "SignalScope" (iOS), or even "GuitarTuna" (Hz mode) can measure the belt's pluck frequency accurately.
• Gates Carbon Drive 应用： Free for iOS/Android. Designed for bicycle belts but works perfectly for GT2 belts on Voron printers.

中国直购提示： The generic USB tension gauges on AliExpress cost $15-25, compared to $50-80 from US retailers. They use the same MEMS microphone technology as the expensive units. If you're sourcing parts for your build, grab one. Check our parts page for recommended AliExpress links.

使用智能手机应用（Spectroid方法）

这是最易上手的方法，且几乎与专用仪表一样准确。以下是逐步操作：

1. 下载频率频谱分析应用（Android 的 Spectroid 非常出色且免费）
2. Home your printer (G28) and move the toolhead to the centre of the build plate
3. 将手机放置在皮带跨度中部附近——最长无支撑段
4. 在跨度中心用力拨动皮带（如弹吉他弦）
5. 观察应用程序频谱显示——你会看到皮带基频处出现明显峰值
6. 记录频率值 (Hz)。重复3次并取平均值
7. 对照下方目标频率

重要提示： Hold the phone close to the belt but don't touch it. Pluck with consistent force — too soft and the peak is weak, too hard and you get harmonics that confuse the reading. A good pluck produces a clean, single peak on the spectrogram.

每个Voron型号的推荐皮带频率

这些频率假设使用标准GT2皮带（X/Y轴宽度6mm，齿距2mm）以及Gates或兼容Gates的皮带。数值因皮带材料和打印机尺寸略有差异。

Z 轴皮带重要说明（V2.4）： The Z axis belts should be tensioned the same as the X/Y belts (110-130 Hz range for the short Z loop). Uneven Z belt tension causes the gantry to rack horizontally. Use the same pluck method on each of the four Z belt loops and ensure all four are within 5 Hz of each other.

方法二：手感法（良好近似）

如果没有频率应用或张力计，“手感法”在您培养出感觉后效果出奇地好。经验丰富的Voron构建者仅凭手感即可将张力调整到正确值的10%以内。

• 吉他弦测试： Pluck the belt at its longest span. It should produce a low, clean tone — think the lowest string on a cello, not a guitar. If it sounds like a rubber band, it's too loose. If it has a high-pitched twang like a violin, it's too tight.
• 偏转测试： Press on the belt at the midpoint of the longest span with moderate finger pressure. The belt should deflect about 3-5mm (about 1/8 to 3/16 inch). If it deflects more than 8mm, tighten. If it deflects less than 2mm, loosen.
• 扭转测试： Grasp the belt at the midpoint and try to twist it. A correctly tensioned belt should twist about 45-60° with moderate force. If it twists 90°+ easily, it's too loose. If you can barely twist it at all, it's too tight.

这些是粗略指标。在通过频率法调校后将其用作验证，或在没有工具时作为起点。

逐步皮带调校步骤

每次需要调整皮带张力时，请遵循以下步骤：

1. 归零打印机： Run G28 to set the toolhead to a known position. Move the toolhead to the centre of the build plate so both X and Y belts have their longest unsupported span.
2. 松开张力螺丝： On the Voron, belt tension is adjusted by screws on the idler pulley mounts. Loosen them just enough to allow the belt end to slide — don't fully remove them.
3. 调整皮带末端： Pull the belt tail through the tension screw to increase tension. Push it back to decrease. This is a micro-adjustment process — small movements make a big difference.
4. 张紧并测量： Tighten the tension screw and pluck the belt. Measure the frequency. Adjust, retighten, and measure again. Repeat until the frequency is in the target range.
5. 检查左右张力是否相等： For each axis, both belts must have nearly identical tension. Measure both sides. If one side is 5 Hz higher than the other, the gantry will rack during fast moves. Adjust the tighter side down to match the looser side.
6. 重新归零并重新检查： Run G28 again. Sometimes belt tension shifts after a homing cycle (especially on V2.4 where the gantry lifts). Measure both axes again and verify targets.
7. 打印测试件： After tensioning, print a 20mm calibration cube at high acceleration (8,000 mm/s²). Check for ghosting on the vertical faces. If you see ghosting, re-check belt tension on that axis.

专业提示： Mark the position of your tension screws with a sharpie or paint pen after finding the sweet spot. This makes it easy to return to the correct tension after replacing belts or performing maintenance.

皮带更换——何时及如何操作

Voron 皮带使用寿命很长（正常使用2-3年），但也会磨损。在以下情况更换它们：

• You see 可见齿面磨损 — rounded or broken teeth on the belt surface
• The belt has 边缘磨损起毛 or loose Kevlar/carbon fibres
• 无法维持目标频率——皮带无法保持张力，从张紧螺丝处滑脱
• The belt has micro-cracks at the tooth roots, visible under bright light
• 打印质量下降且其他校准均正常

正品Gates皮带与通用皮带

Gates PowerGrip GT2 are the official recommended belts for Voron printers. They use a proprietary rubber compound with Kevlar tensile cords that maintain tension over years. A genuine Gates belt costs about $15-25 for a roll of 5m from US retailers, or 中国直购价8-12美元 on AliExpress.

通用 GT2 皮带（通常标注为"GT2-6mm"）售价 $3-5，但有显著缺点：橡胶质量较低，负载下拉伸更大；齿形不一致导致振动；使用寿命较短。我们的建议：从中国直购渠道购买正品 Gates 皮带。$8-12 的价格仅比通用皮带略贵，性能与 $25 的美国版本完全相同。

如何识别假冒Gates皮带： Look for the "Gates" logo embossed on the belt surface every 300mm. Real Gates belts have a slightly textured rubber surface (not smooth). The teeth should be cleanly cut with no flashing. If the price seems too good to be true ($2-3), it's a generic belt in a Gates-style package.

皮带张力维护计划

皮带张力并非一劳永逸。它会因多种原因随时间变化：

• 初始磨合期（前50小时）： New belts stretch slightly as the Kevlar cords settle. Check and re-tension after your first 50 hours of printing.
• 温度变化： Rubber expands and contracts with temperature. If your enclosure hits 60°C+ during ABS printing, belts will loosen by 5-10 Hz. Tension at printing temperature, not cold.
• 季节变化： Ambient temperature swings of 20-30°C between summer and winter can shift belt tension noticeably. Check tension at the start of each season.
• 正常磨损： After 500+ hours, belts may need a minor adjustment (2-5 Hz). If you're adjusting more than 10 Hz after 500 hours, the belts are wearing out and should be replaced.

快速检查流程： Every time you change filament or recalibrate, pluck each belt once. If it sounds different from last time, measure the frequency. A 30-second check prevents hours of troubleshooting later.

皮带张力问题故障排除

• 皮带频率正确但仍有残影： Check for loose pulley grub screws — the pulley may be slipping on the motor shaft. Also check that the belt isn't rubbing against a sharp edge (extrusion corner, printed part).
• 皮带无法保持张力： The tension screw may be stripped, or the belt tail isn't caught properly. Remove the belt, inspect the tension mechanism, and reinstall. If the belt has stretched beyond the adjustment range, replace it.
• 皮带一侧明显比另一侧紧： This causes gantry racking. Loosen the tighter side and tighten the looser side to match. Re-measure both sides. A 5 Hz difference is acceptable; 10+ Hz will cause print artifacts.
• 高速运行时皮带发出"嗖嗖"声： The belt teeth are catching on the idler pulley. Check for A/C idler bearings (the Voron community recommends F695-2RS bearings). Lubricate or replace if rough.
• 频率读数不稳定（两次拨动间差异超过10 Hz）： The belt may be hitting a zip tie or cable chain. Make sure the belt's unsupported span is clear of obstructions. Also check that the belt isn't running at an angle against a pulley flange.