I got the arcdroid all setup, did the calibration, it was out by about .7mm on the x and .2-.3mm on the y. Good enough. However checking the points on the calibration triangle and drawing a line, they were at a right angle but a little askew from the axis on the screen. I did some test cuts, then a couple circles and they were ovals. So I decided to recalibrate, thinking maybe I had thrown something off. I cannot get anywhere near an accurate calibraition. I went through the proceedure at least a dozen times or more and not only does the stylus appear off screen sometimes after homing but now if i check the points on the calibration triangle for the 313mm measure, it's somewhere between 20 and 50mm off in the x and between 3 and 20mm off in the Y after each calibration. And now drawing a line, it's really askew from the grid, as one would expect with it being off so much.
I tried to download the firmware off the website to see if a reload would help it but apparently the download link only opens a new windws to the site. (I know reloading firmware has fixed 3D printer problems for me in the past.) Maybe there is a hard reset function hidden somewhere?
Anyone else have any problems with the calibration?