Print Time Estimation wrong

[spooner777 0]

When I print a part with Cura and it tells me a print takes 1:50h. It usually takes twice as long. I am at 83% right now and it already printed for 2:40h. Why is that?

 

[illuminarti 18]

Daid can say for sure, but I think it's because it doesn't take into account acceleration factors which mean that the average speed for every move is lower than the nominal print speed - and for short segments it can be quite a lot lower.

Kisslicer allows you to specify what acceleration you are using, in order to better calculate print times. It's not perfect, but it's usually pretty close.

 

[Daid 304]

Illuminarti is spot on here. The times calculated in Cura do not account for acceleration, which can cause anything between a 20% and a 100% error. It's pretty hard to estimate printing times, unless you fully simulate the machine (which I might do some day, if I have one of those mad-coding days)

 

[spooner777 0]

Illuminarti is spot on here. The times calculated in Cura do not account for acceleration, which can cause anything between a 20% and a 100% error. It's pretty hard to estimate printing times, unless you fully simulate the machine (which I might do some day, if I have one of those mad-coding days)

 

I am disappointed Daid.

 

[pablobell 0]

So Daid if you just multiply the estimated time by 1.6, the estimation error will be about +-30% or less. I am assuming the uncorrected calculated times are always less than the actual ones, as it happens with NetFabb.