Hi this is my first post. I apologise in advance if this is a well worn topic but I am new to this site a quick search didn't show up anything relevant. Like many on here, I rely on the accuracy of Festool. For me there has been one notable exception; my Trion PSB 300 EQ jigsaw. I never bonded with this machine. It has mostly sat in its box unused because whatever I tried (FSG blades, new base runner etc) it seemed determined to not cut straight or perpendicular. I was even thinking about buying a Mafell to replace it.
Recently I had to use my jigsaw to make a cut in oak, as nothing else would fit. I installed a new FSG blade, adjusted the carbide guides, pressed in a new splinter guard. It was then that I noticed that the splinter guard sat at a slight angle with the base runner. On further inspection, I found the blade was perpendicular but the base had a twist in one of the forward arms: looking at it from the front, one arm was rotated slightly upwards on the blade side. The base runner and splinter guard had the effect of amplifying this run-out. In addition, the base runner could not sit fully flush at the back due some protruding casting flash. I managed to straighten the front of the base and cleaned off the flash so that the base runner sat flat. I then tested the cut using the guide rails on 18 mm plywood It now cuts straight and perpendicular! Finally!
Recently I had to use my jigsaw to make a cut in oak, as nothing else would fit. I installed a new FSG blade, adjusted the carbide guides, pressed in a new splinter guard. It was then that I noticed that the splinter guard sat at a slight angle with the base runner. On further inspection, I found the blade was perpendicular but the base had a twist in one of the forward arms: looking at it from the front, one arm was rotated slightly upwards on the blade side. The base runner and splinter guard had the effect of amplifying this run-out. In addition, the base runner could not sit fully flush at the back due some protruding casting flash. I managed to straighten the front of the base and cleaned off the flash so that the base runner sat flat. I then tested the cut using the guide rails on 18 mm plywood It now cuts straight and perpendicular! Finally!
