I am using Inkscape with a UScutter SC 801. I am able to plot fine (practicing with a pen), but my very last point at the end of the plot -it does not lift the pen, but instead draws the line back to the origin.

I am trying to get this all straight before using a razor.

milesteg

Do you mean that the plotter is drawing a line that you did not draw in Inkscape? Maybe there's some option for the plotter? Maybe it's always expecting a closed path?

Hello,
I have exactly the same problem, and I started to read the code of the extension, modifiying the HPGL end code... Which doesn't work.
One surprising thing : when I show the "debug code", I copy/paste the HPGL output & send it directly to the plotter, there is NO more going-back-to-origin-with-plotter-down line !

I'm not so far, I have to found where in the code the "send command" is done.

I'll put my solution here & send it to the code repo too.

Rgds

Hello, I checked the code sent by Inkscape to the Plotter via a virtualSerialPort & the HPGL code exported (and sent manually via a cat command).
They are exactly the same.
So, the problem should come from pySerial implementation ... Investiagation continues.

Thanks for the info and for keeping us updated

Is this for Exensions menu > Export > Plot ?

yes & it's near the same as the "export HPGL" format...

I found something : the extension menu uses the "plotter.py" code, that add an extra "PU,0,0;IN" code. If you remove that, I think it will work. I had to test next week (my plotter is at my fablab ...)