Command : circle

[chuankaia]

mapdl.clear()
mapdl.prep7()

k0 = mapdl.k("", 0, 0, 0)
k1 = mapdl.k("", 1, 0, 0)
carc0 = mapdl.circle(k0, 1.75, k1)
a0 = mapdl.al(*carc0)
mapdl.lplot(background="w", color="y", line_width=5, show_bounds=True, cpos="zy")

When drawing a circle parallel to the zy-plane, an error occurs, which prompts: Axis and start points are colinear with the center point. But when you draw circles parallel to the xy plane or the xz plane, there's no problem, such as:

k0 = mapdl.k("", 0, 0, 0)
k1 = mapdl.k("", 0, 1, 0)
carc0 = mapdl.circle(k0, 1.75, k1)
a0 = mapdl.al(*carc0)
mapdl.lplot(background="w", color="y", line_width=5, show_bounds=True, cpos="zy")

Is this a bug, or is there a grammatical error in my writing

[mikerife]

Hi @chuankaia
I transferred this question to the Discussions as the behavior is expected. For a circle in the ZY plane the PZERO keypoint needs to be defined as well. See the MAPDL help on the circle command here.

The commands needed are then:

mapdl.clear()
mapdl.prep7()

k0 = mapdl.k("", 0, 0, 0)
k1 = mapdl.k("", 1, 0, 0)
k2 = mapdl.k("", 0, 1, 0)
carc0 = mapdl.circle(k0, 1.75, k1, k2)
a0 = mapdl.al(*carc0)
mapdl.lplot(background="w", color="y", line_width=5, show_bounds=True, cpos="zy")

Mike

[chuankaia]

Thank you for your answer, the problem has been solved
Best wishes