I’ve had my K2+ for a few months now, and have pushed over fifteen kilograms of filament through it. I’ve recently taken a job prototyping some parts for a company and my issue is the dimensional accuracy of my prints. I do have a wonky Z screw on one side of my machine, but when I reached out to Creality support, they seemed to dismiss the issue and simply sent me replacement brackets that ride on the Z screws and guide rods, which the build plate attaches too. Any help would be greatly appreciated.
My print contains a series of 11.5mm holes (as seen in the attached image) but my finished prints are coming out 10.95mm to 11.02mm. I have run all of the onboard calibration and I am at a loss as to what my next steps should be in correcting this issue.
most (all?) filament expands (more like spreads) as it is laid down. I work mostly in PLA and I see this on my prints all the time. There are some settings in the “Quality > Precision” section of the prep menu’s to help compensate for this. take a look at the setting “X-Y hole compensation”. That might be able to help you out.
in the picture, it looks as if the measurement tool is not accounting for perspective. I don’t use that tool. All I can offer is the observation
X-Y-hole compensation is the way to go here I think. Holes coming out too small is very common in 3D-prints and half a milimeter is a pretty normal range but easy to compensate for. At least depending on how tight you need the tolerances of course. Although to be honest, if you need super tight tolerances, you’ll have to spend time not just generally calibrating the printer but calibrating for the specific model you want to print and should think about whether 3D-printing is really the right manufacturing technique…
My solution to produce most tight fitting holes is to use a 0.1 mm increment drill bit set. I have a set that goes from 0.5 to 10mm. I usually print holes 0.2 mm overside and then depending on the type and thickness of material I use drill bits 0.1 to 0.3 mm oversize. My set is used exclusively for plastic as the bits need to be kept razor sharp otherwise they just force their way into the holes which just expand and then shrink back when the bits are removed. I also have a set of adjustable hardened steel reamers sized from 6 to to 32mm which I have employed occasionally. These and drill bits don’t always work in awkward situations but they cover most of what I do.
