12 Replies Latest reply on Feb 20, 2015 6:32 AM by John Stoltzfus

# dimensioning holes in an arc

I have a 45, 90 and 180 degree arc with holes every 15 degrees. I used the circular pattern to put the holes in but when I try to dimension them in the flat pattern it says it cant dimension to them (only to holes or arcs).

I understand that the holes are placed in at the angle but in the flat how can I dimension to them.

I can figure out the arc length and place them in using the fold / unfold command but for each of the 45, 90 and 180 I have 4 different radius to use in a design table.

that's alot of calculations for a bunch of holes in a flat pattern.

Any ideas

• ###### Re: dimensioning holes in an arc

I don't know what edges or vertices there are for the holes in the flat pattern, but maybe you can sketch horizontal and vertical construction lines across the center of each hole and dimension to those lines. Maybe you'll be able to snap an endpoint to the top center, side center, bottom center etc.

• ###### Re: dimensioning holes in an arc

That is what I started to do but I have about 30 holes per size and 4 flats per drawing..it should be easier that sketching 120 things on a drawing...

1 plus for Inventor on this one.

• ###### Re: dimensioning holes in an arc

Steven,

In the part file add a 3d sketch and then show the sketch in the drawing and dimension from there

• ###### Re: dimensioning holes in an arc

I tried that you cant ordinate dimension to them plus if you use regular dimensions it grabs coordinate points not the center.

You also cant add center marks to the holes.

• ###### Re: dimensioning holes in an arc

Steven,

You might try to turn on temporary axis, dimension to the temp axis, the dimensions should stay after temp axis are turned off.

• ###### Re: dimensioning holes in an arc

temp axis are not shown in a circular pattern in the flat pattern.

• ###### Re: dimensioning holes in an arc

There has to be an easy way..if not that is sad..

• ###### Re: dimensioning holes in an arc

Model the part flat, then add bends. The holes should be round in the flat pattern.

• ###### Re: dimensioning holes in an arc

I received a responce from the Tech Support of our re-seller...basically you cant. The only work around is to make the original holes smaller than I want then in the flat pattern convert the hole to construction and redraw the holes on the center of the smaller hole.