Hello!
first of all I am not sure if this is the right place to post this so apologies if it isnt and ill delete it.
I recently gotten a vintage HP draftpro DXL 7575A plotter and ive been trying to get it to work on my windows 10 machine.
It has a serial RS-232-C port on the back and im using a serial rs-232 to usb converter to connect it to my PC.
But when i use the terminal to send commands I receive nothing.
I installed and reinstalled the drivers of the converter. and confirmed it worked because i shorted the RX and TX pin and i got a feedback loop.
The plotter itself also isnt the problem because everything on it works. the demo plot works fine and so do all the buttons.
so it must be a connection problem. and thats where im stuck.
the code im sending is HPGL which is easy to send a few commands.
the code:
IN;
SP1;
PA2000,2000;
CI500;
which means it initialises the plotter, picks pen 1, goes to coordinates 2000,2000 and draws a circle.
I checked the manual if i put the DIP switches in the right spot and the BAUD rate is correct
manual: HP Computer Museum
I also added some pictures of the back and the cable im using.
Thanks for reading all of this!
Damnub