Well the plot thickens. I did the full bed cut of 9 parts last night from a single sheet and everything was undersized by about 1mm-1.5mm. I sent the machine back to zero, Z up, as I do and shut down. I came back today to run more of the parts in a new sheet and now a part that is 21mm and came out at 19.9mm last nght is coming in at 23mm. It’s a contour cut. Nothing changed over night, same laptop, same everything, same Fusion data. Although I did adjust some of the contour cut settings, nothing that should have widened it, as that wasn’t my intent. I was going to make it work as long as everything was under sized by the same amount.
I am using some truly horrible G1S 1/2" ply from Home Depot. Never again. It’s too much work to design and set things up to cut garbage material. I didn’t know quite how bad this stuff is. I’m actually wondering if the quality of it and potentially some flex in the wood (due to the narrow width of some of my cuts and the poor material quality) may be contributing to it. But if that were the case I wouldn’t expect such consistency across the table either.
I’m really at a loss as to what has happened. I’m going to work my way through the other 5 sets of cuts and see if I can salvage the project at the end. As it was designed to be precise I have my doubts but I need the project done before I can mess with the machine again. Very frustrating.
I did replace the grub screw with an M5. Not sure how I missed that during assembly. I did check my Y axis ones and they are fine, so unclear how the X got so out of whack but it seems better with the M5 in there. Very tight and stable now.
I’m starting to feel like I can’t start any material project without going through a pre-flight checklist of all the major fasteners and adjustments. I’m tempted to partially disassemble the machine and build it back up from the (now updated and very nice) manual. I used Chris’ video the first time, which I found very good, but I can’t help thinking maybe I missed something? Is anyone else finding they have to do a lot of adjusting to maintain consistency even over a few days of use?