I’ve finally finished the build and have successfully carved a few items, a couple where super intricate and took ~3 hours. The xyz took it like a champ. It’s nice to finally see some success after a few months of headaches (not xyz related; I had to get my garage ready, build a new table and working on it almost daily for a few hours at a time (sometimes late into the night)
Anyway, I am super happy with the results thus far with the exception of some variation in the depth of cut. On most of my pieces there is usually one side where the depth is slightly shallower than the other side. Its most prevalent in the X direction but the Y also suffers (although no as much).
I have checked for square and it is a little off to the order of 2mm across the 1500mm bed. I figured, 1-2mm across 1500mm is really not going to be noticeable especially considering most of my work pieces are going to be in the order of 3-500mm at most. For all intents and purposes, my straight edge looks spot on. The only way I can tell is by measuring with a 0.5mm gradation ruler at each extremity.
I have also noticed that there is a little slack in the z-axis. This one was the most difficult to get square but it is. There just seems to be some play in the axis more than I would like.
I have uploaded some shots of my electronics box and the problem carves.
Any ideas? Do i need to surface my waste board?
I am using Vectric Aspire for CAD/CAM and UGCS to upload the gcode. I am using a 60deg 6mm v-bit and my depth of cut is 0.7mm. I ave tried a simple fusion 360 generated gcode piece as well as a sample shapeoko test pattern and I have the same issue.
I can provide more info re GRBL settings and cut speeds but I don’t think they are relevant here?
Some differences (my machine)
- I have stiffened the X-axis using MattWheeler’s method using 10 bolts evenly spaced across the 1500mm length.
- I have a 1500mm bed in both x and Y directions
- my wasteboard is 16mm laminated MDF (cant find bare MDF at the right size which is 1500x1500!)
- the wasteboard is supported by 4 (not 3) shorter extrusions (see pic) - and a $&# load of threaded inserts which were punched, drilled, countersunk and threaded!
- I have a customised electronics box that houses my AIO and power supply. It has a top mounted IEC connector with fused switch and emrgency stop button and top mounted SUNON 240V fan blowing out. I also have a 40mm fan blowing in in addition to the 40mm fan blowing on the AIO (I dont think this affects it but just in case the info is here)
I still have a bit of cleanup to do but so far I’m pretty happy with the results. Let me know if you want some more pics of the build and ill create a dedicated post.
Thanks in advance