[Tutor] Pen plotter data format

[Dennis Lee Bieber]

On Sat, 1 Apr 2023 11:21:09 +1000, Phil <phillor9 at gmail.com> declaimed the
following:


>I don't know what format pen plotters normally receive their data in and 
>I'm hoping that someone may know. An Internet search hasn't helped so far.

	What search terms have you tried? Note that most of these use HP-GL
control language, NOT the CNC g-code. If you are trying to create an actual
pen plotter, and not a 3-D printer, writing a parser for HP-GL may be
desirable.


http://support.ricoh.com/bb_v1oi/pub_e/oi_view/0001036/0001036829/view/printer/unv/0125.htm
https://medium.com/quarterstudio/an-intro-to-pen-plotters-29b6bd4327ba
https://chiplotle.readthedocs.io/en/latest/chapters/plotters/index.html
http://sites.music.columbia.edu/cmc/chiplotle/manual/chapters/tutorial/intro.html
<https://www.raspberry-pi-geek.com/Archive/2015/11/A-Python-interface-to-a-large-format-pen-plotter/(offset)/2>

	Note that the absolute minimum command set appears to be: IN
(initialize device -- likely means zeroing the paper position if the paper
also moves), SPn (Select Pen n), PUx,y (Pen Up, move to (x,y)), PDx,y (Pen
Down, move to (x,y)). All sent as ";" delimited text strings (but not
needed as a termination, it seems from the last link).