topic Re: Make Sharp Corners in Turning in HSM Support Forum

Make Sharp Corners in Turning

Steinwerks — Fri, 01 Sep 2017 19:22:31 GMT

So I'm trying to eliminate arcs in rough turning toolpaths and did notice an option under the Compare & Edit dialogue called Make Sharp Corners. I expected this to work as it does in milling, but it seems to have zero effect. This would make the code at the machine much simpler for the operator to make adjustments on or just following the coded toolpath.

This has Make Sharp Corners turned on:

Re: Make Sharp Corners in Turning

BjoernJohnsson — Mon, 04 Sep 2017 09:36:16 GMT

Hi Neal

I have created a ticket for this issue, with the reference CAM-8283.

Björn Johnsson

Sr. Software Engineer for HSM CAM

Re: Make Sharp Corners in Turning

scottmoyse — Fri, 08 Sep 2017 09:53:36 GMT

I'd like to see that setting in the passes tab.. not just in compare and edit.

Re: Make Sharp Corners in Turning

Steinwerks — Fri, 08 Sep 2017 12:06:40 GMT

I agree! So I made an idea: https://forums.autodesk.com/t5/hsm-ideas/make-sharp-corners-in-turning/idi-p/7364455

Re: Make Sharp Corners in Turning

Lonnie.Cady — Fri, 08 Sep 2017 21:26:33 GMT

The make corners sharp is already exposed in the Fusion turning UI. So I would think the plan was to expose if in the HSMWorks UI also at some point. Not that it works in Fusion either.

Re: Make Sharp Corners in Turning

scottmoyse — Fri, 08 Sep 2017 21:37:58 GMT

I believe it should only work with in control or wear compensation turned on. But I haven't tested this in turning.

Re: Make Sharp Corners in Turning

Lonnie.Cady — Fri, 08 Sep 2017 21:49:42 GMT

not sure how it was intended but should work regardless of compensation IMO. However it does not really matter to me as it is a setting I don't use. I don't see the advantage of that setting in the work I do. Would be interested in know its use.

Other software I use has the option to do it either way but it is controlled by the angle between the intersecting lines.

Re: Make Sharp Corners in Turning

scottmoyse — Fri, 08 Sep 2017 21:48:58 GMT

If it works like it does in milling (it only applies to internal square corners). Then it would be pointless with In Computer comp. In that case it shouldn't show in the UI. I'll have a look later.

Re: Make Sharp Corners in Turning

scottmoyse — Fri, 08 Sep 2017 21:49:00 GMT

If it works like it does in milling (it only applies to internal square corners). Then it would be pointless with In Computer comp. In that case it shouldn't show in the UI. I'll have a look later.

Re: Make Sharp Corners in Turning

Lonnie.Cady — Fri, 08 Sep 2017 21:57:11 GMT

We must be talking about 2 different setting. Keep corners sharp in milling is for outside corners and is under "outer corner mode"

Minimum cutting radius controls internal corners in Milling.

In turning it should turn to a point allow the TNR to stop contacting the part before moving in the new direction.

Re: Make Sharp Corners in Turning

scottmoyse — Fri, 08 Sep 2017 22:00:58 GMT

Nope.. Make Sharp Corners is what I'm taking about. It's a different setting from the corner mode you are referring to in milling. Make Sharp Corners is a checkbox that only appears when you switch away from In Computer comp, and it doesn't have a tooltip.

Re: Make Sharp Corners in Turning

scottmoyse — Fri, 08 Sep 2017 22:01:00 GMT

Re: Make Sharp Corners in Turning

Lonnie.Cady — Fri, 08 Sep 2017 22:17:47 GMT

I see, but I believe what @Steinwerks is wanting is it to work like the outer corner mode "make corner sharp"

I could be wrong and he is wanting something else. Like I said I don't have an opinion either way I guess. Provided sharp edges end up sharp even when tool rolls around corner I don't really care.

Make corner sharp the way it is implemented in milling does not make much sense in turning IMO. I assumed the current make corner sharp in turning was basically an outer corner mode for turning.

Re: Make Sharp Corners in Turning

scottmoyse — Fri, 08 Sep 2017 22:21:14 GMT

It makes sense for people with controllers which have issues comping arcs inwards when the arc radius is close to the tool radius... It also forces the resulting radius from the tool/insert to be exactly that, instead of a 'comped' radius.

Re: Make Sharp Corners in Turning

Lonnie.Cady — Fri, 08 Sep 2017 22:29:17 GMT

then how would that pertain to the image @Steinwerks posted? make corner sharp is exposed regardless of the comp setting in fusion turning.

I guess I have have been fortunate enough to never run in to the issues you describe, so I will leave it to those that do.

Re: Make Sharp Corners in Turning

Steinwerks — Fri, 08 Sep 2017 23:25:35 GMT

I guess to clarify I would expect it to make corners sharp as the corner condition, same as in milling. As stated in the original post, it is to simplify the code to get as clean and unfettered a toolpath as possible.

I said it right in the initial post: trying to eliminate arcsin roughing passes

Re: Make Sharp Corners in Turning

scottmoyse — Fri, 08 Sep 2017 23:56:47 GMT

Yeah I understand... but that setting isn't meant to do what you think it's meant to do... either way, it doesn't work. It should only show up in the UI, when In Control, Wear, or Inverse Wear is selected. You can see its the same parameter in Fusion Turning Profile as it is in 2D Contour:

You can also see the correct behaviour for this setting if you use it with 2D Contour. In the image below you can see it appearing and disappearing... its the same in Fusion 2D contour, I just checked. What you are after for Profile is the setting in the drop-down menu, which I highlight in the green box. Make Sharp Corners and the values in that drop-down do totally different things.

This is the effect of the Make Sharp Corner setting in 2D Contour. Also note that the external corner remains an arc, because the drop-down setting is the default "Roll around corner".

It doesn't work in Turning Profile... because it doesn't do this.... although the internal corners are sharp anyway in turning profile, because it isn't applying the comp rad... at least it isn't with Tip Tangency set for the insert definition.

Re: Make Sharp Corners in Turning

Steinwerks — Sat, 09 Sep 2017 14:48:41 GMT

Well that's just a bizarre thought pattern. Like "Corner Slot" in CamWorks.

Re: Make Sharp Corners in Turning

BjoernJohnsson — Mon, 11 Sep 2017 09:08:11 GMT

The behavior from this setting is what Scott Moyse is describing, it is for keeping inner corners sharp when using in control or wear compensation.

We are considering adding a setting for sharp outer corners in turning. The reference CAM-8283 can be used to track the new feature for sharp outer corners.

Björn Johnsson

Sr. Software Engineer for HSM CAM

Re: Make Sharp Corners in Turning

scottmoyse — Mon, 11 Sep 2017 10:05:13 GMT

@BjoernJohnsson wrote:

The behavior from this setting is what Scott Moyse is describing, it is for keeping inner corners sharp when using in control or wear compensation.

We are considering adding a setting for sharp outer corners in turning. The reference CAM-8283 can be used to track the new feature for sharp outer corners.

Björn Johnsson

Sr. Software Engineer for HSM CAM

@BjoernJohnsson please can you create a couple of tickets for this 'Make Sharp Corners' setting in turning, because it's not working. The first issue is it shouldn't show in the UI when comp is set to In Computer... second, activating 'Make Share Corners' has no impact on the toolpath because the internal corners are already square in turning... possibly because compensation isn't working correctly.

And please, make sure that the 'sharp outer corners' is implemented consistently with the UI on the milling side.