Moiré pattern

There are some artifacts showing up in the prints of the delta printer. Depending on the shape of the object they are more or less visible. I printed a flat vertical object, 80 x 80 mm, to be able to see the effect properly:

Most of the time this is no problem, but there may be some ways to tune the printer to minimize the deviations.

Interesting discussion going on on the google forums here.