layer set to 0.2, but sometimes it goes 0.19 and 0.21

[edis 0]

I'm having some issues with my printer. Some time ago i've build marlin from:

https://github.com/ErikZalm/Marlin

I'm not sure if there's a problem with the firmware, or with my hardware but if i slice a model and print it i noticed that the layer heights shown on the LCD are not all the same. Some layers varies.

Like this 0.2 -> 0.4 -> 0.59 -> 0.79 -> 0.89 -> 1.1 -> 1.3 -> 1.5 -> 1.69 -> and so on. So does this happens only for me or this is a known issue? At gcode output from slicer, everything looks fine, z is incremented by 0.2mm.

Any ideas?

 

[Daid 306]

Simple rounding error, 0.60 is actually stored as 0.5999999999999999999999999999 internally in the chip, which is displayed as 0.59

Nothing to really worry about.

 

[edis 0]

Thank's that's good to know:)