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There are at least 3 factors that make parts slightly different size than the positioning of the nozzle. These have to do with elasticity of liquid PLA and also shrinkage issues. Also over and under extrusion - especially on the first layer.
It would really nice to see your part.
Anyway, the experts here all do the same thing when they need precision:
They print a part, then measure it just like you did. Then they ADJUST THE STL to compensate. So if a wall is off by .5mm they move it by .5mm.
Then print it again WITH ALL THE SAME SETTINGS. Especially temperature and print speed.
This seems like extra work. But you will find that particular sized shapes will shrink different amounts. For example a circle will tend to pull inwards more if it is a vertical hole. But less on exterior surfaces. When you change color of PLA the adjustments all change.
With experience you will eventually be able to compensate the correct amount on the first try each time.
You may think CURA should do all the compensation for you but it's difficult as simply changing your fan setting or nozzle temperature or bed temperature will change the needed adjustments. Also changing color of PLA.
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gr5 1,871
There are at least 3 factors that make parts slightly different size than the positioning of the nozzle. These have to do with elasticity of liquid PLA and also shrinkage issues. Also over and under extrusion - especially on the first layer.
It would really nice to see your part.
Anyway, the experts here all do the same thing when they need precision:
They print a part, then measure it just like you did. Then they ADJUST THE STL to compensate. So if a wall is off by .5mm they move it by .5mm.
Then print it again WITH ALL THE SAME SETTINGS. Especially temperature and print speed.
This seems like extra work. But you will find that particular sized shapes will shrink different amounts. For example a circle will tend to pull inwards more if it is a vertical hole. But less on exterior surfaces. When you change color of PLA the adjustments all change.
With experience you will eventually be able to compensate the correct amount on the first try each time.
You may think CURA should do all the compensation for you but it's difficult as simply changing your fan setting or nozzle temperature or bed temperature will change the needed adjustments. Also changing color of PLA.
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