CharlieWorton

I'm the originator of this thread, and I did solve the problem. I'm using a Chinese Prusa clone printer, and it has been incredibly troublesome. I have replaced or modified virtually everything on the machine. During one of these repair episodes, I inadvertently swapped the X and Y motor actuator leads. This resulted in the mirroring activity I originally described. Signals intended for the X stepper motor were being sent to the Y stepper motor, and vice versa. When I discovered and rectified my mistake, the issue went away. My advice would be to check your wiring, and make sure that you haven't made the same mistake I did. When I win the lottery, I will purchase an Ultimaker. Until then, I'm stuck in 3D hell with a printer that spends most of its life broken. As it currently is, with issues unrelated to this thread. Hope this helps - Charlie

Hi, GR5! The printer is a Chinese Zonestar printer, essentially a stainless steel frame Prusa design. Software is (I believe) Marlin, running on a Melzi board. Here's a link: https://www.aliexpress.com/item/Upgraded-Quality-High-Precision-Reprap-Prusa-i3-3d-Printer-DIY-kit-with-2-Rolls-Filament-free/32342171432.html This link shows the current model; mine is about 2 years old, and has the older Melzi board. The strange thing is, it worked fine for quite a while, and has only started to print backwards in the last 6 months or so. (I don't use it a lot.) So, in the beginning, it did work well, which leads me to believe that I've inadvertently set a switch to the wrong setting. I can't imagine a hardware failure causing this. BTW, the reversed print printed properly. So, somewhere in the slicer or the printer, a horizontal mirror image is being asked for and created. I just have no clue how this might have happened. Thanks for your help! >Charlie

I've encountered the strangest problem ever. I generated a small cap for an accessory lens I own, and I labelled the cap with the phrase '2X Barlow Lens' using the text function in 123Design (Yeah, I know. I haven't switched over yet.) The cap printed fine, but the text was completely reversed - a mirror image. I found the option to generate a mirror image of the .STL file in Cura (4th screen button down on the left hand side) and when I clicked that, I was able to duplicate on screen what had actually printed. I now have a print of that reversed image coming off the printer. But... what the heck? Is there some setting in the printer setup file I might have messed up? Has anyone else had this problem? It just seems so bizarre, that the printer will spring to life, and generate a perfect, exact mirror image of what I asked it to print. Thanks for any help you can provide... >Charlie