[leeK9]

im building a small wankel rotary project for my ME course

im trying to code up the best way to mill out the housing shape....

i was planning on just following X and Y co-ord but it will leave a jumpy jagged edge i think ?

maybe there is a pocket code i can use that allow be to input my parameters and follow the shape to its constraints?

below is the excel spreadsheet for the codes....360 x and 360 y points.....

[keebler303]

You should use arc segments (G2, G3) wherever you can. The control will interpolate the arcs as precisely as the machine is capable. If you cannot create the entire shape from arcs, I'd suggest CAM.

[leeK9]

the shape follows a function....its not really as arc or radius that can be meausred.....

i basically have 360 points that i can traverse through on a G01 and take the middle section that is left with a circular pocket or something

[miljnor]

the shape follows a function....its not really as arc or radius that can be meausred.....

i basically have 360 points that i can traverse through on a G01 and take the middle section that is left with a circular pocket or something

Well that may be true but when you establish a min max error (ie + - .005) I am betting that the pocket can be described as several arcs with tangential connections.

I have made prototypes for wankle motors in the very distant past and NONE of the drawings I received were functions.

My bet is there is an allowable deviation from the equation (deviation from perfect) and that is what you need to determine.

[keebler303]

A 1 degree resolution is going to give you a faceted pocket. If you are stuck on using linear moves, I'd suggest solving your equations at .1 or even .01 degree intervals. The length of your linear moves should be on par with the resolution of your machine to get the truest representation of your profile.

Using all linear moves your code is going to be thousands of lines long and you may run into a blocks/second processing problem. You can get virtually the same shape using much longer arc segments and have maybe only a hundred lines for the entire profile.