OpenBuilds Documentation

OpenBuilds BLOX provides support for using an RC servo to raise/lower a pen, in Pen Plotter type applications, or other imaginative uses

Make sure to set grblHAL settings (CONTROL > Grbl Settings Tab

$33 Spindle PWM Frequency > Set the value to '50' and for most standard RC Servos that have moves 180 degrees set

• $33=50
• $34=2
• $35=2
• $36=15

$34/35/36 sets up the timing - resulting in a 0.4 - 3ms pulse witdh range that suits most standard servos 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.