I use version 1.8 software for printing. The new version software saves a mount of time because the software "knows" where the print is in the build area. Instead of doing a complete cycle (full movement in x direction), the vat goes half cycle or less. The phenomenon is also described by Robert Howle viewtopic.php?f=24&t=2786. Actually I quote a lot from his words.
Our problem is the tolerance for our parts is less than 10 um, the change of the vat moving pattern (from full movement to perhaps half movement) has impact on the printed parts. I attach two photos of the printed groove with 150um width. The groove is printed from the bottom to the top, so the photo shows different lays of groove. It can be observed that the "shift" of the layer appears on every 30 layers. When the printer begins to print the first 30 layers, the groove is straight. When printing another 30 layers, the groove totally shift 50um on one side. In the next 30 layers printing, the grooves becomes straight again. I have a feeling the phenomenon has something to do with the new feature of software saving time control.
I was wondering if I can turn off the time saving control of the software for the price of more printing time, so that the vat can do full movement for each cycle.
Another solution might be using the previous software without the time saving feature. Does anyone could let us know where to obtain the old version software? Thank you for help in advance.