r\problem with sketch in solidworks 2007

[brianklein]

I'm having trouble creating a ratchet wheel with a OD of 1.25 and a groove diameter of 1.055 with eighteen V like teeth. since there are eighteen teeth each tooth is going to be 10 degrees evenly distance apart (the space between teeth is also 10 degrees . the problem is that does solidiworks have a easy way of revolving the sketch around if you have a angle fragment of the part, like i have in the zip file (under the title ratchet 4). I tried using centerlines at angles to produce the ratchet wheel but it keeps changing the dimesions of the OD in groove depth diameters, as well as the V teeth were not aligned properly on the angle dimensions. For instance when a mirrored the second tooth from the first which was drawn between 5 degrees and 15 degrees. however when i made a 20 degree centerline to mirror the V tooth into the second position, it did NOT align the V tooth between 25 degrees and 35 degrees. and the endpoints of the mirrored object were at an angle of less than 40 degrees (roughly 39.95 ). When i changed that number to 40 degrees, it then changed the 20 degree centerline to a number 19.789. I just want to construct a 18 tooth ratchet wheel that the teeth are in a 10 degree angle as well as the spaces between them.
can anyone help??? And is there a way to place the eighteen teeth without using centerlines???

[DareBee]

does solidiworks have a easy way of revolving the sketch around if you have a angle fragment of the part

Yes - very very easy.
Circular sketch pattern

[brianklein]

how can i access the circular sketch function for Solidworks 2007???

[Kiwi]

This may help.

[JerryFlyGuy]

Personally I don't use the sketch pattern very often.. I find doing 1 cut and then patterning the cut to be faster and less cluttered .. and easily adjustable as well..

J

[tnik]

I'll agree with Jerry..

I've had better luck with changing a feature pattern vs. changing a sketch pattern.

When using a sketch pattern and having to make adjustments after, sometimes I would have to add extra relations, or play with the existing to get what I wanted. Usually with a feature pattern, I can make changes easily.