Drop a drawing or picture here

Polar Plotter

Open picture or · ·

No drawing yet · or paste one (Ctrl+V)

Size 100% Turn 0°

Darkness

How dark a pixel must be to count as ink. Starts at the best split for this picture.

Chrome or Edge, plotter plugged in by USB. Connecting restarts the Arduino, so set center again each time.

…

Move Pen Step

Text

Pattern

Calibrate

Settings

Drawing width mm Pen speed mm/min Pen up Z Pen down Z Center gap mm Line gap mm

Fixes drawings when the pen's line misses the platter center. Negative = other side.

Space between spiral rings or hatch lines.

Reverse rotation

For drawings that come out mirrored.

Show pen-up moves

Picture style

Outlines: the pen goes around each dark shape.
Centerlines: for line drawings, each line drawn once.
Spiral: one line from the center, wiggling where dark.
Hatch: crossed lines shade photos; darker gets more.

Test files

If the circle closes and the spoke is straight, the machine is fine. Start with G92 X0 Y0 Z0, pen on the center.

Plotter console

For GRBL settings like $$ or $101=29.6. Connect first.