The invention discloses a 3D printing
system based on a
virtual instrument. An operation method for the 3D printing
system comprises the following steps: initial operation: accomplishing the initial operation of the
system by using a laminated
sequential structure; parameter setting: controlling the upper and lower limits of the
thermal resistance of a heating part by using a circulation embeddedcondition structure, setting an
event structure in a waiting
branch, and editing and modifying the
thermal resistance of the heating part via the
event structure so as to set upper and
lower limit parameters; manual printing: pretreating the system, wherein the pretreatment includes preheating of the system and debugging and setting of the coordinates of a
nozzle at the same time, and performing motor operation,
extrusion motor operation and
temperature control at the same time; and 3D printing: subjecting corresponding 3D object data to layering and
slicing, contour optimization, lamellar
data processing and other treatment so as to obtain corresponding coordinate information, and controlling a triaxial motor according to the coordinate information so as to realize fixed-point layer-by-layer printing and lamination so as to obtain a 3D object. The 3D printing system provided by the invention realizes 3D scanning and printing via LabVIEW, and is fast in the operation speed of programs,easily debuggable in visual
programming and high in printing accuracy.