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Step 24Pen lift servo
If you fasten a little servo motor to the gondola, you can use it to lift the pen off the page. There are two servo connectors on the motorshield, if you connect up SER1, then this will respond to commands sent to the machine. I just use the control horn to poke through the gondola and lever against the surface.
The commands can be issued manually by using # or ~ to raise or lower the pen. This is not very subtle, but it works well enough to prevent the pen from leaving a big bleedy mark at the end of the drawing. These commands are automatically added to the beginning and the end of the queue when you do a drawings.
The commands can be issued manually by using # or ~ to raise or lower the pen. This is not very subtle, but it works well enough to prevent the pen from leaving a big bleedy mark at the end of the drawing. These commands are automatically added to the beginning and the end of the queue when you do a drawings.
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