topic Re: spiral fit arc in PowerMill Forum

spiral fit arc

Anonymous — Tue, 06 Jun 2017 07:30:54 GMT

ist possible in constant z finish to have spiral and fit arc togather in order to have ij format and decrease the number of line

Re: spiral fit arc

iamcdn79 — Tue, 06 Jun 2017 11:18:42 GMT

When you select the spiral option for constant-z the arc fit setting gets turned off so it is not possible unless you make your own rads in your cad.

People like myself have been requesting this feature for years but doesn't get implemented but someone requests the ribbon feature interface and that gets changed right away, go figure

Re: spiral fit arc

Anonymous — Tue, 06 Jun 2017 11:31:11 GMT

I know that but always spcicaly when making holse by canstantz I use feature and helical stratigy its get better result

Sent from my Huawei Mobile

Re: spiral fit arc

johnc4668 — Wed, 14 Nov 2018 16:14:56 GMT

@iamcdn79 @Anonymous Have you heard any news on powermill using arc fit corners on spirals or on steep and shallow yet? Whats your workaround for this right now? thanks

Re: spiral fit arc

iamcdn79 — Wed, 14 Nov 2018 16:39:38 GMT

Last I heard was they are in the process of implementing it by adding an stl model with the necessary larger rads in the background calculation. When that comes out I have no idea.

My workaround is either having to create my own fillets in my cad software. It is painful and tedious at times depending on the complexity of the model or just clear the corners with a smaller tool then go back to the larger tool to finish.

Re: spiral fit arc

johnc4668 — Wed, 14 Nov 2018 16:43:52 GMT

@iamcdn79 Ok cool, i was thinking about splitting the steep and shallow into a constant z and a raster but thats more tool paths and i dont like it arcing on and off all the time and putting lines in walls. Powermill seems to be behind on this feature, we can do this all day long with visi and worknc.

Re: spiral fit arc

M_Hennig — Wed, 14 Nov 2018 17:14:28 GMT

There is a way to arc all corners using a stock model and the "stock engagement" option, BUT you need a really good tight tolerance stockmodel to get it to work decently. Even so, it's still a workaround in my book.

Re: spiral fit arc

johnc4668 — Wed, 21 Nov 2018 13:22:58 GMT

@M_Hennig thanks for this info. Can you send me a screen shot of your stock engagement/ stock model parameters to get the toolpath to arc in the corners?

Re: spiral fit arc

M_Hennig — Wed, 21 Nov 2018 14:20:21 GMT

https://www.youtube.com/watch?v=jryFKj0hW54

Just to be clear, you need a very tight tolerance stock model to get decent results.

Re: spiral fit arc

5axes — Wed, 21 Nov 2018 14:39:41 GMT

https://forums.autodesk.com/t5/powermill-forum/toolpath-s-links-isssue/m-p/7345546#M5714

EDIT TOOLPATH ; HORIZONTAL_COIN_FI 1 0.01 : 1 = Radius value and 0.01= Tolerance

But it works only for non spiral toolpath, Spiral toolpath are automaticaly converted into Z Constant toolpath style.

Sometimes in some special case it's possible to use a pattern but depending of the quality of the original toolpath, it's not always possible to insert an Arc everywhere.