A drawing apparatus based on a robotic arm includes a bracket, a driving device located on the bracket and a robotic arm connected to the driving device, wherein the driving device consists of two speed-reducing stepper motors, one speed-reducing stepper motor being provided with an upper arm, a tail end of the upper arm being hinged to an auxiliary arm, a tail end of the auxiliary arm being hinged to a drawing arm, the other speed-reducing stepper motor being hinged to a lower arm, a tail end of the lower arm being hinged to the drawing arm, and a head end of the upper arm and a head end of the lower arm being connected through a torsional spring.
展开▼
