Accuracy issue here.
Just printed an industrial part today with Anycubic Green resin for a client. Surface quality is superb. It's a 0.3 thick, 2cm wide, 6cm long piece printed with 45 degree and good supports underneath. I know the supports were good because it's a quite thin piece and the top/down face came as flat as they're supposed to be and it can be mount to an existing part (also 3d printed previously by a high-end nylon-metal powder SLS machine from Shapeways) perfectly.
The issue is the length is somehow extended more than 1mm strong, which is absolutely too much for industrial assembly. I re-checked the dimensions from the file and re-printed it again but the length is still more than the correct value. (There's actually an exactly same part printed by the SLS machine as well so it's easy to compare them two, and the SLS one turned out to be much more accurate)
Any thoughts about this? I know some resin printers have good accuracy/tolerance (usually marked as %) on X and Y axes but didn't do a good job on the Z axis. Is that the case on Photon? Is it the machine issue and happens on all resins with similar distortion or does it differ resin by resin?
Either way, is there any test print files available to test the accuracy on each single axis so we can compensate them before the prints?
Appreciate all of your thoughts and input. Cheers.
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