Tnx for that !
Now, I am only looking for the costs related to the printer if it is effectively printing 50% of all time available for, well three years.
Costs per part will of course include this rate, multiplied by the time the part is on the printer. Other cost wil be added, like material costs, design costs etc.
So, for me its currently only the hourly rate that matter.
I see these elements
Price of the machine minus remaining value after effective usage (E2k)
Period of effective usage, like 3 years (3 x 8.765hrs)
% effectively used time for printing, like 50% (pretty high for an Ultimaker I guess, but let's start with this; 3 x 8.765 x 50%=13.150hrs)
Reservartion for repais, incl sapare parts (E1.000?)
Power costs (I prefer to use an average value here and invclude it in the hourly rate, in stead of relating this to what is actually printed; it's easier calculating; E 0,50/hr?)
...