can't figure this out.

[Greolt]

unfortunately I am away from home and will be for a while longer so can't post any files / pics,

OK perhaps when you get home we can pick it up again.

Greolt

[MikeUSNRet]

ended up being able to get back home sooner than expected..thankfully....

[Greolt]

Pictures don't show your machining strategy.

Can you post the Crv3d file or if not then the gcode.

Greolt

[MikeUSNRet]

I have zipped up the crv3d file and put it on my dropbox for download here:

https://dl.dropboxusercontent.com/u/191 ... clitho.zip

[Greolt]

OK as best I can tell you machined as shown in the pic and stopped the job part way through when the right hand side of the rectangle was obviously wrong.

Does this sound right?

Your code is about 2.26 million lines. Step over for each pass is 0.0013"

My first thought would be some sort of mechanical slippage. Work holding. Pulley slipping on shaft. Etc.

After that, my next best guess is step and direction signals are not set correctly.

Check your stepper drive specs to see if they trigger on a rising or falling edge and set the high/low active accordingly.

With such a small step over, you have many many rotary axis direction changes in code and it is possible that you are losing or gaining one step on every change.

I would also suggest that you try something with a larger stepover till you get the result you are expecting.

Also use a machining strategy that makes each pass along the rotary axis, not across it.

To see what I mean by that, look at this youtube video. About half way through you can see the machining.



Greolt

[Greolt]

No response. How did you go with this?

Greolt