i am trying to make a crank for a small 4 stroke engine i have drawn up the crank with rino and when i try to generate the g code in rhinocam it is cutting the crank part off & leaving a spindle in the centre can anyone help

Can you post a pic.?  You know what they say, a picture is worth a thousand words.

Brett

hi thanks for the reply i hope you can throw some light on this

mick

cheers

Are you trying to make it on a lathe or a mill?

Graham.

i am trying to make it on a taig mill with a 4th axis i have posted the code that rhino cam is producing im just toataly lost

Email me a .iges file of the part and lets have a look at what can be done.

Graham.

Looking at the NC code you posted it looks like you are roughing from the wrong side, rotate the datum onto the opposite face and work from that side.

Graham.

here is the .iges file you requested i do appreciate you time & helping a novice in this area

mick

Ok, this is how I would do the first op.

Datum is on left hand end for X axis.

Y and Z axis are on indexer centre line.

Using a 1/8" end mill.

I would try it on a bit of wood or plastic first.

Material is 1.375 square or round, by length of job plus what ever length you need to clear the indexer with the head.

Graham.