Butterfly

This is another one derived from data for the sandplotters at Sisyphus Industries.
https://sisyphus-industries.com/
The first time I did it I started it going, watched the first part and then went off to work in the yard.
It drew a little bit too big.

So I shrunk it by 10%.

I made videos of both of them. Since this is just drawing the path and not stopping to draw circles it only takes about an hour to draw either one so it appears to move much faster than in previous videos. It is actually sped up by the same amount as the longer videos on previous days.
I also see that I need to cover the window next to the doodler when I film these during the day time.

This one is Amazing

This one has 6680 x,y points. It fills the memory of the Arduino board to 96%. It took an hour and a half to draw. Here is the timelapse.

I used a different drawing technique for this one. I took one step forward, two steps back and two steps forward each time. Due to the way the doodler works the pen doesn't always repeat so that made some of the lines thicker than others. I got the data for this pattern from the exchange forum for these drawing machines:
https://sisyphus-industries.com/

Tumbling Blocks

This one is for my quilt friends.

Here is a faster time lapse.

Here it is a little slower.

I broke it

I was plotting the other day and all of a sudden the pen scooted off the board and hit the wall.

One of the bobbins that wind up the fishline had broken it's glue joint.
I got a new bobbin and glued it back on with JB Weld.

Then I ran a couple of calibration plots to see how well it worked.

The diagonal lines are the result of the bobbins not being centered on the motor shaft. There are lines at right angles to the left motor that I didn't fix but very few at right angles to the right motor. Comparing these to ones that I made back in March I think I did a better job of centering the bobbin this time.