Move holes on a cylinder?

mrmagne

Hi, 

I have made this cylinder with holes around it and i would like to move the holes in a V shape around the cylinder (mirrored on each side). Now, i have tried to use the dimension tool to try and set a length from the cylinder side wall to the center of each hole, but that is not working.

Any tips for me here? Sure would appreciate it  

konstantin_shiriazdanov

if you may need to place holes along some arbitary path on the cylinder or cone faces then you had to use my Sketch Wrapper featurescript to create the path and Curve Pattern Normal featurescript to keep orientation normal to the surface. If you only need to place holes along helix then you can use Helix command and Curve pattern normal FS. the second way if you need pattern along the helix is to parametrise your hole position by variable and use feature pattern

philip_thomas

@mrmagne - Onshape is a very powerful professional grade 3D CAD platform. Please check out the Onshape learning center for awesome tutorials.
www.learn.onshape.com.

To get you going, here is a quick public document showing what i think you're asking for



https://cad.onshape.com/documents/1f863cbbcea49bed45409618/w/3abb3b92d9cf642a9de9fc28/e/68fe3dd5192ac5bbf4676567

mrmagne

Hi @philip_thomas and thanks for your effort

Your example was not what I was after, sorry if my explanation was poor.

Try visualise a rectangular square with one large V on the whole surface, i then want holes along the whole V, then transform the rectangle to a cylinder. So when the top and bottom of the V meets on the cylinder, i would get two holes on each edge of the cylinder where the top of the V pattern is and one hole in center just below the top holes.

philip_thomas

@mrmange - sorry, no idea what you're describing. How about drawing the pattern unrolled onto a piece of paper. Take a picture with your phone and post it here. It will take 5 minutes to model whatever pattern you draw.

mrmagne

@philip_thomas Hope this drawing helps. 

First image would be if i set the cylinder standing on a table looking right at it. 


Second image would be of the cylinders whole face, looking at it on a rectangular perspective. 

konstantin_shiriazdanov

maybe this is what you need https://cad.onshape.com/documents/1a8f7e70de92072dbfff4cfb/w/ff5687642dac5fc48610ad37/e/53601ded9dc38969532bfd94

mrmagne

Thanks, with some tweaks i think i can use this method. The method is currently to complex for my skill level, but i will study and learn it

mrmagne

If there is an easier way to achieve this, let me know

konstantin_shiriazdanov

if you may need to place holes along some arbitary path on the cylinder or cone faces then you had to use my Sketch Wrapper featurescript to create the path and Curve Pattern Normal featurescript to keep orientation normal to the surface. If you only need to place holes along helix then you can use Helix command and Curve pattern normal FS. the second way if you need pattern along the helix is to parametrise your hole position by variable and use feature pattern