In my collection of low cost materials and processes for value engineering,

3D Printing
,
1

In my collection of low cost materials and processes for value engineering, I came across the news that Isis3D has 20 Micron positional accuracy and costs US$2,199. It is described as low-cost, high-quality desktop 3D Printer. Is it true?

2

“20 micron positioning accuracy” means 50 steps/mm on X and Y, which is not very good at all. For comparison, the Deezmaker machines have 112 steps/mm X/Y resolution (Z resolution is, of course, much higher).

3

It is essentially a MendelMax 2.0 clone, I believe the 20 micron is just referring to the stock Z layer height as this machine should have the standard gt2 belt setup of every other reprap machine.

4

@Brad_Hill Here’s how it’s written: Maximum resolution: 20 μm X and Y; 50 μm layer height

5

yes that is probably true: 20micrometer per step of the motor. This however has nothing to do with print accuracy.
people always get confused about positional accuracy, and print accuracy.
Print accuracy is about the same for all good tuned FFF machines with the same nozzle size and print material.
ig. PLA out of a hot 0.5mm nozzle expands about 80μm.
That is 4x as much as the positional accuracy.