Machsupport Forum

G-Code, CAD, and CAM => G-Code, CAD, and CAM discussions => Topic started by: bm1400 on December 29, 2007, 05:08:34 AM

Title: crank shaft
Post by: bm1400 on December 29, 2007, 05:08:34 AM

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

Title: Re: crank shaft
Post by: Chaoticone on December 29, 2007, 10:07:29 PM

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

Brett

Title: Re: crank shaft
Post by: bm1400 on December 30, 2007, 05:38:17 AM

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

mick

Title: Re: crank shaft
Post by: bm1400 on December 30, 2007, 05:44:02 AM

cheers

Title: Re: crank shaft
Post by: Graham Waterworth on December 30, 2007, 09:24:41 AM

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

Graham.

Title: Re: crank shaft
Post by: bm1400 on December 30, 2007, 11:52:24 AM

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

Title: Re: crank shaft
Post by: Graham Waterworth on December 30, 2007, 01:46:52 PM

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

Graham.

Title: Re: crank shaft
Post by: Graham Waterworth on December 30, 2007, 02:43:56 PM

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.

Title: Re: crank shaft
Post by: bm1400 on December 31, 2007, 04:40:37 AM

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

mick

Title: Re: crank shaft
Post by: Graham Waterworth on December 31, 2007, 08:55:11 AM

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.

Title: Re: crank shaft
Post by: bm1400 on December 31, 2007, 10:40:07 AM

thank you so much ill give it a go in the morning if my head isnt to bad cheers & all the the best to you ;D