Hi, I am sure I do not understand something essential about the for loop in OpenSCAD. Here is my little code: //Parameters for the cool air ducts cadductsn = 4; //Number of cool air ducts caddiamo = 3; //Outer diameter of cool air ducts caddiami = 2; //Inner diameter of cool air ducts cadlength = 40; //Length of cool air ducts caddist = 12.5; //distance of cool air ducts from x-axis pcoolairducts = 27.5; // Module onecoolairduct module onecoolairduct(){ rotate([0,90,0]) translate([caddist,0,0]) linear_extrude(cadlength,center=true,convexity=10) difference(){ circle(r=caddiamo/2); circle(r=caddiami/2); } } // Module coolairduct module coolairduct(){ for(i=[1:cadductsn]) rotate([360/cadductsn,0,0]) onecoolairduct(); } My expectation was that I will get four of these pipes with 90 degree rotation to each other. I see only one. What am I doing wrong? Thanks ahead, Infocean -- Sent from: http://forum.openscad.org/

On 24.03.21 05:48, infocean via Discuss wrote: > rotate([360/cadductsn,0,0]) I suspect that should read: rotate([90*i,0,0]) ciao, Torsten.

Yes, you are right . rotate([i*360/cadductsn,0,0]) Thanks for looking at it! -- Sent from: http://forum.openscad.org/