[moldmker]

....if you turn on adaptive roughing in either Pocket the roughing paths go off on an unscheduled excursion....

It works....you just have to give the tool some elbow room.
Put your roughing tool down to 1mm and recompute.

[SBC Cycle]

It works....you just have to give the tool some elbow room.
Put your roughing tool down to 1mm and recompute.

That's probably a better way of putting it. I backed the tool down to 1MM and it worked for me as well. 4mm slot with 3mm tool and 0.2mm side allowance doesn't even begin to allow enough room for the Adaptive Rough to do it's job.

The toolpath is odd and I would report it to BobCAD development. Unless BCC staff can chime in and explain why it would wrap around the outside of the profile. Although the tooling or toolpath choice is poor for the job the move outside the pocket is concerning.

I believe the problem lies in the default value for the "smoothing" of the Adaptive Rough when using 2D-Pocket. There really should not be a crash here but I think some default values are coming in to play here and messing it up.

[magicniner]

It works....you just have to give the tool some elbow room.
Put your roughing tool down to 1mm and recompute.

That's a positive and helpful response, many thanks. There does seem to be a % of tool width for a slot out through an edge below which Adaptive will will nip out the back and get up to no good, I have a job in planning where narrow slots from the edges join with larger internal channels and I'll now know to test with adaptive and either turn it off or split the job if the same issue arises.

Why would you use Adaptive Roughing when the size of the endmill is already 75% of the width of the slot?

Excellent point!
And the answer is that as a beginner like many others I'm following tutorials and Training Professor Videos. The Open Pocketing tutorial I watched checked the adaptive box without mentioning in what situations it might be better left unchecked, now I know

JSYK,advanced rough/adaptive rough,,,is a ROUGHING tool path.

JSYKIK Yes, the two pockets have roughing passes leaving 0.1mm followed by a finishing pass. Nowhere in BobCad Cam Help does it mention that where Adaptive is used and the tool to work clearance on your job is a bit close you might get funny things happen, in fact there's no entry under Adaptive and the entry for Pocket is a sketch of one specific V-Carve instance rather than a useful reference on the parameters and options for Pocketing.

This file has lots of issues.If you not really making it,I'll pass.

I'm not really surprised, all I did was import the solid and Extract Edges to a new layer. Then Profile went fine then Pocket went funny, until I divined that Adaptive will do funny things if selected where not strictly needed there was no point in any further work. I'll probably work it through now, tidy it up and cut one as it's proving a good learning excercise, just a quick mention of any issues you spotted would have been much appreciated BTW.

Because there is no entry in Help for Adaptive Roughing, and only an example for V-Carve Pocketing in help under Pocketing, if this saves someone else an hour or more's buggering about trying to resolve an undocumented issue then that's great, and pretty much the point of posting ;-)

- Nick