How do I Draw This

[IanMDalton]

How would I go about drawing this, I can draw a Helix but having trouble sorting the other bits out. Or am I using the wrong software

Cheers

Ian Dalton

[Patchy]

Follow this video, it's about the same way:

https://www.youtube.com/watch?v=HxLBxDofRJ0

[WeTanks · Accepted solution]

Please refer to the attached documnet.

[leeminardi · Accepted solution]

The helix is tapered so you have to take that into account.  There are several ways to construct the shape. Here's how I would do it.

1. create a helix as noted. The 1.84 turns is  360° + 302°/360° I fudged the base radius to get a taper similar to the drawing.
   
2.  Use explode to convert the helix to a spline.  Then with ortho on move the last 3 CVs to make the spline end at the target point (3mm inboard).
   
3. From the front view add a 9 mm vertical line at the end of the spline.  The goal now is to blend the spline into this line.
    
4. Move the end CV down to where you want the radius corner to end.  Note that we now need to make the slope of the end of the spline vertical.
   
5. Using SPLINEDIT  Add two new CVs to spline between the end and second cv.  Move the new second CV using osnap nearest so that it is on the vertical line.  This will ensure tangency between the spline and the line.  Working in the front view adjust the location of the second and third CVs to get a good looking radius.
   
6. Go to the top view and with ortho on adjust the locations of the second and third CVs to get a smooth transition.
   
   
   
7.  Use sweep to create a solid.
   
   

[IanMDalton]

Thank you for this, The helix haven't got a taper just the way it is being viewed but the solution is great cheers

[leeminardi]

@IanMDalton I noticed that the spacing between each wind of the coil is not the 5 mm as required in the drawing.  However, if you divide the coil height of 15.5 by the number of turns 1.84 you get 8.42 and not 5.  I think the drawing may be over constrained.  You could move the coil CVs up or down  to try and yield the 5 mm spacing but I do not think there is a solution that meets all the given dimensions.

[IanMDalton]

Cheers for the info, another quick on how do I do the 58deg 

[JoseMandirigma · Accepted solution]

check @leeminardi solution @IanMDalton , he points out 360degree+302 degree (302=360-58), in terms of revolution this will be 1.8389......1 = 1 revolution (360 degree), 0.8389 = 302degree which get from 302/360. cheers.