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--- docs:blackbox-x32:connect-rc-servo [2022/08/22 18:16]
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+++ docs:blackbox-x32:connect-rc-servo [2025/04/01 18:30] (current)
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 ===== 3.3.6 BlackBox X32 RC Servo =====
+You can connect a RC Microservo directly to BlackBox:
-OpenBuilds BlackBox provides a way of using an RC servo to raise/lower a pen, in Pen Plotter type applications
+=== Important note on current (amperage): ===
-NB: Advanced functionality, requires you to install a custom version of GrblHAL
+Please note the BlackBox can only supply around **250mA** for powering micro servos etc.\\
+If you want to use a more heavy duty servo that may pull more than 250mA it would be recommended to use an external power source for the servo, otherwise you might damage the BlackBox
+=== Wiring ===
+OpenBuilds BlackBox provides support for using an RC servo to raise/lower a pen, in Pen Plotter type applications, or other imaginative uses
+{{:docs:blackbox-x32:servo_2.6.png?600}}
+=== Configuration ===
+Make sure to set $33=50 in grblHAL settings (CONTROL > Grbl Settings Tab > Scroll down to $33 Spindle PWM Frequency > Set the value to '50' and Save
+TIP: Set $33=50 (PWM frequency), $34=5, $35=5 and $36=10 to generate a "standard" PWM signal: 20ms repetition rate, 1 - 2ms pulse length range. You may decrease $34 and $35 to output a shorter pulse than 1ms at min, and increase $36 to get a longer pulse than 2ms at max.
+For most standard RC Servos that have moves 180 degrees when $34 and $35 are set to 2 and $36 to 15 - resulting in a 0.4 - 3ms pulse witdh range.
+{{:docs:blackbox-x32:servo-pwm-freq.png}}
+=== Calibration ===
+OpenBuildsCONTROL includes a tool to calibrate the Pen Up / Pen Down positions of your Servo. Please perform this step prior to trying out the Pen Up / Down values, and also note down the S-Values as advised by the Calibration Tool to use in your CAM setups later on.
+Go to Wizards and Tools > Calibration > Calibrate Servo Pen Up / Down:
+{{:docs:blackbox-x32:servo-calibration.png}}
+=== Pen Control Buttons ===
+When $33 is set to 50hz, CONTROL will enable the Pen Up / Pen Down Buttons you can use to test you servo, check Pen Down positions to ensure your pen is touching the writing surface, etc
+{{:docs:blackbox-x32:servo-buttons.png}}
-{{:docs:blackbox-x32:servo_2.6.png?600|}}

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