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KevinOConnor
2025-01-17 00:05:15 +00:00
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zh-Hant/Measuring_Resonances.html
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</li>
<li class="md-nav__item">
<a href="#configure-lis2dw-series" class="md-nav__link">
Configure LIS2DW series
<a href="#configure-lis2dw-series-over-spi" class="md-nav__link">
Configure LIS2DW series over SPI
</a>
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選擇 max_accel
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<a href="#unreliable-measurements-of-resonance-frequencies" class="md-nav__link">
Unreliable measurements of resonance frequencies
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</li>
<li class="md-nav__item">
<a href="#configure-lis2dw-series" class="md-nav__link">
Configure LIS2DW series
<a href="#configure-lis2dw-series-over-spi" class="md-nav__link">
Configure LIS2DW series over SPI
</a>
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選擇 max_accel
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<a href="#unreliable-measurements-of-resonance-frequencies" class="md-nav__link">
Unreliable measurements of resonance frequencies
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<h1 id="_1">共振值測量<a class="headerlink" href="#_1" title="Permanent link">&para;</a></h1>
<p>Klipper has built-in support for the ADXL345, MPU-9250 and LIS2DW compatible accelerometers which can be used to measure resonance frequencies of the printer for different axes, and auto-tune <a href="Resonance_Compensation.html">input shapers</a> to compensate for resonances. Note that using accelerometers requires some soldering and crimping. The ADXL345/LIS2DW can be connected to the SPI interface of a Raspberry Pi or MCU board (it needs to be reasonably fast). The MPU family can be connected to the I2C interface of a Raspberry Pi directly, or to an I2C interface of an MCU board that supports 400kbit/s <em>fast mode</em> in Klipper.</p>
<p>Klipper has built-in support for the ADXL345, MPU-9250, LIS2DW and LIS3DH compatible accelerometers which can be used to measure resonance frequencies of the printer for different axes, and auto-tune <a href="Resonance_Compensation.html">input shapers</a> to compensate for resonances. Note that using accelerometers requires some soldering and crimping. The ADXL345 can be connected to the SPI interface of a Raspberry Pi or MCU board (it needs to be reasonably fast). The MPU family can be connected to the I2C interface of a Raspberry Pi directly, or to an I2C interface of an MCU board that supports 400kbit/s <em>fast mode</em> in Klipper. The LIS2DW and LIS3DH can be connected to either SPI or I2C with the same considerations as above.</p>
<p>When sourcing accelerometers, be aware that there are a variety of different PCB board designs and different clones of them. If it is going to be connected to a 5V printer MCU ensure it has a voltage regulator and level shifters.</p>
<p>For ADXL345s/LIS2DWs, make sure that the board supports SPI mode (a small number of boards appear to be hard-configured for I2C by pulling SDO to GND).</p>
<p>For MPU-9250/MPU-9255/MPU-6515/MPU-6050/MPU-6500s there are also a variety of board designs and clones with different I2C pull-up resistors which will need supplementing.</p>
<p>For ADXL345s, make sure that the board supports SPI mode (a small number of boards appear to be hard-configured for I2C by pulling SDO to GND).</p>
<p>For MPU-9250/MPU-9255/MPU-6515/MPU-6050/MPU-6500s and LIS2DW/LIS3DH there are also a variety of board designs and clones with different I2C pull-up resistors which will need supplementing.</p>
<h2 id="mcus-with-klipper-i2c-fast-mode-support">MCUs with Klipper I2C <em>fast-mode</em> Support<a class="headerlink" href="#mcus-with-klipper-i2c-fast-mode-support" title="Permanent link">&para;</a></h2>
<table>
<thead>
@@ -1940,6 +1954,11 @@
<td align="left">-</td>
<td align="left">AT90usb646, AT90usb1286</td>
</tr>
<tr>
<td align="center">SAMD</td>
<td align="left">SAMC21G18</td>
<td align="left">SAMC21G18, SAMD21G18, SAMD21E18, SAMD21J18, SAMD21E15, SAMD51G19, SAMD51J19, SAMD51N19, SAMD51P20, SAME51J19, SAME51N19, SAME54P20</td>
</tr>
</tbody>
</table>
<h2 id="_2">安裝指南<a class="headerlink" href="#_2" title="Permanent link">&para;</a></h2>
@@ -2195,10 +2214,15 @@ sudo apt install python3-numpy python3-matplotlib libatlas-base-dev libopenblas-
</code></pre></div>
<p>Next, in order to install NumPy in the Klipper environment, run the command:</p>
<div class="highlight"><pre><span></span><code>~/klippy-env/bin/pip install -v numpy
<div class="highlight"><pre><span></span><code>~/klippy-env/bin/pip install -v &quot;numpy&lt;1.26&quot;
</code></pre></div>
<p>Note that, depending on the performance of the CPU, it may take <em>a lot</em> of time, up to 10-20 minutes. Be patient and wait for the completion of the installation. On some occasions, if the board has too little RAM the installation may fail and you will need to enable swap.</p>
<p>Note that, depending on the performance of the CPU, it may take <em>a lot</em> of time, up to 10-20 minutes. Be patient and wait for the completion of the installation. On some occasions, if the board has too little RAM the installation may fail and you will need to enable swap. Also note the forced version, due to newer versions of NumPY having requirements that may not be satisfied in some klipper python environments.</p>
<p>Once installed please check that no errors show from the command:</p>
<div class="highlight"><pre><span></span><code>~/klippy-env/bin/python -c &#39;import numpy;&#39;
</code></pre></div>
<p>The correct output should simply be a new line.</p>
<h4 id="configure-adxl345-with-rpi">Configure ADXL345 With RPi<a class="headerlink" href="#configure-adxl345-with-rpi" title="Permanent link">&para;</a></h4>
<p>First, check and follow the instructions in the <a href="RPi_microcontroller.html">RPi Microcontroller document</a> to setup the "linux mcu" on the Raspberry Pi. This will configure a second Klipper instance that runs on your Pi.</p>
<p>通過執行<code>sudo raspi-config</code> 后的 "Interfacing options"菜單中啟用 SPI 以確保Linux SPI 驅動已啟用。</p>
@@ -2257,7 +2281,7 @@ pin: adxl:gpio23
</code></pre></div>
<p>通過<code>RESTART</code>命令重啟Klipper。</p>
<h4 id="configure-lis2dw-series">Configure LIS2DW series<a class="headerlink" href="#configure-lis2dw-series" title="Permanent link">&para;</a></h4>
<h4 id="configure-lis2dw-series-over-spi">Configure LIS2DW series over SPI<a class="headerlink" href="#configure-lis2dw-series-over-spi" title="Permanent link">&para;</a></h4>
<div class="highlight"><pre><span></span><code>[mcu lis]
# Change &lt;mySerial&gt; to whatever you found above. For example,
# usb-Klipper_rp2040_E661640843545B2E-if00
@@ -2482,6 +2506,8 @@ max_smoothing: 0.25 # an example
<p>so that it can calculate the maximum acceleration recommendations correctly. Note that the <code>SHAPER_CALIBRATE</code> command already takes the configured <code>square_corner_velocity</code> parameter into account, and there is no need to specify it explicitly.</p>
<p>如果您正在重新校準整形器，並且建議的整形器配置報告的平滑度與您在之前校準期間得到的幾乎相同，則可以跳過此步驟。</p>
<h3 id="unreliable-measurements-of-resonance-frequencies">Unreliable measurements of resonance frequencies<a class="headerlink" href="#unreliable-measurements-of-resonance-frequencies" title="Permanent link">&para;</a></h3>
<p>Sometimes the resonance measurements can produce bogus results, leading to the incorrect suggestions for the input shapers. This can be caused by a variety of reasons, including running fans on the toolhead, incorrect position or non-rigid mounting of the accelerometer, or mechanical problems such as loose belts or binding or bumpy axis. Keep in mind that all fans should be disabled for resonance testing, especially the noisy ones, and that the accelerometer should be rigidly mounted on the corresponding moving part (e.g. on the bed itself for the bed slinger, or on the extruder of the printer itself and not the carriage, and some people get better results by mounting the accelerometer on the nozzle itself). As for mechanical problems, the user should inspect if there is any fault that can be fixed with a moving axis (e.g. linear guide rails cleaned up and lubricated and V-slot wheels tension adjusted correctly). If none of that helps, a user may try the other shapers from the produced list besides the one recommended by default.</p>
<h3 id="_10">測試自定義軸<a class="headerlink" href="#_10" title="Permanent link">&para;</a></h3>
<p><code>TEST_RESONANCES</code> 命令支持自定義軸。雖然這對於輸入整形器校準並不是很有用，但它可用於深入研究打印機共振並檢查皮帶張力等。</p>
<p>要檢查 CoreXY 打印機上的皮帶張力，請執行</p>