How to create this compound curve

  • Advertise with us

« back to Designing Woodworking Projects forum

Forum topic by JoelB posted 03-14-2011 04:57 AM 1191 views 1 time favorited 3 replies Add to Favorites Watch
View JoelB's profile


18 posts in 3370 days

03-14-2011 04:57 AM

How would you go about creating one of the arms in the star pattern on this piece? I am thinking about trying to duplicate this for my self and would like your input. I am thinking about building an angled platform to place the piece at an ange on the RAS and then turn the head on the RAS 90 degrees and tilt it too and then pull it through the workpiece. Seems like a lot of trial and error to get the angles right. I plan on making one and then making a mold of it and duplicating it via the mold.

Would love input on this.

Here it is:


3 replies so far

View Loren's profile


10385 posts in 3645 days

#1 posted 03-14-2011 05:23 AM

If you know how to work with molds, carve it out of a soft material. I
wouldn’t bother trying to figure out how to machine it from wood.
From the look of it the curves may be sheet metal.

View TopamaxSurvivor's profile


18269 posts in 3673 days

#2 posted 03-14-2011 05:50 AM

The star patterns are intersecting sine waves. Not quite sure how you are thinking of cutting them.

-- Bob in WW ~ "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View Dandog's profile


250 posts in 2772 days

#3 posted 03-14-2011 05:54 AM

well I would start by making my stock round, build a jig to put it on the table saw. rip cut it into the half-round. Then you just have to sand it or cut on the lathe with the depth stop that matches the contour of the half-round or little less.slap it back, tablesaw with a stop. Crosscut. Put it back, lathe, Do the contour on the lathe then back to the tablesaw crosscut repeat.that would take some serious time. You to find a way to make the contours all the same with the stop that hardest part. You figure that out you got it licked. Metal lathes have a Quill on the opposite end of the chuck. Set the depth stop, you got it.I take check and MasterCard. ;-)
you have to lay out equal increments on the bed of lathe. then you move the quill forward to the thickness of the piece. On the quill should look like the contour. The half-moon shape will develop as that’s cut out.

-- life an woodworking is one big experiment

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics