How to override various errors
Posted on 2006-04-29
I have a laser engraver which is basically an hpgl plotter. The plotter came with its own windows based software for designing want you want to engrave AND for driving the engraver. So far, this is working (but their software is limited to pixel based graphics) It is also supposed to work as a stand alone engraver. According to the manual, I should be able to install an hpgl compatible printer driver so that I can "plot" straight from windows apps (As in - I want to plot from a CAD program)
I have tried many plotter, vinyl cutter and engraver drivers, but I always get the same error - "Can not print. Printer is out of paper". Uh, since there is no paper tray in this device, there are no paper sensors.
The engraver itself has few switches. Just a power switch and a laser on button. There are no little swiches on the output card.
Connects to computer via 36pin centronics/25pin cable to parallel port 1 (lpt1)(And have tried LPT2). Computer is P3 600Mh 512 Mb Win 98. I need Windows to run various software, but would consider 2k or XP if that helps.
Here is what I have tried so far:
installed a quality, configurable HPGL driver
LPT1 and LPT2
setting LPT1 to output only - std bidirectional - EPP - ECP
printing from CAD
printing test from driver interface
printing from DOS prompt
printing from DOS
For what it's worth, I periodically connect an inkjet to do test prints and to verify that the ports are really working and both ports print fine.
I am willing to build a "grappler", if I need to override pin12 or any of the status pins, but would prefer to do that with settings on my computer...Besides, i can see how I could force pin 12 low but not sure how to set pin 15 high and curious about Ack and Init ...
The people in China from whom I purchased the engraver say they couldn't get it to work (though it does say that it should in the manual) and that was the end of the support.
Hoping to find a real expert who can help me debug the handshake signals so I can cut some vectors.
I am thinking this is dificult - 500 points - Thanks