My latest print, 90% OK.

[lee websterParticipant @leewebster72680]

At least this time everything printed. I changed some of the settings on my printer, I increased the time for each layer to be "cooked" by the uv light, and also the amount of time between printing each layer and I slowed down the raising of the build plate to counter the effects of suction under the plate as it is raised. Two hours later I had a build plate with all 4 prints on it. They had printed OK, but the surface of the prints that had the supports on was very rough. Some parts had 4.1mm holes in them to bolt to other parts. A 4mm set screw was a snug fit. 2 of the parts had a flange that was supposed to locate in a third part. The flange was too big and will have to be filed to fit. I might do away with the flange in another print and use dowels instead.

I am now wondering how accurate a resin 3D printed part should be?

[lee websterParticipant @leewebster72680]

[BazyleParticipant @bazyle]

A resin print can be very accurate since the resolution in x&y is set by the pixels in the screen that provides the exposure so is a few thou. This should also make things very repeatable even if you have used some calibration factors. The z axis is dependent on the lift mechanism but should be calibrate-able to just a few thou.
However you can get 'growth' by over exposure as light from exposing layer No2 also can expose some more resin around layer No1. There are some settings to allow for this. You can also get some under-exposed resin redissolving and most common is inadequate washing before final post print curing putting extra material into crevices and corners that are hard to wash.

[lee websterParticipant @leewebster72680]

Hi Bazyle,

Thanks for the pointers. I will have a look at my settings to see I can alter them again, I was just relieved to actually get a full build plate!

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