Rest pocket (Machining) question

[Gazman (Garry Leighton)]

Hi all, I have seen a similar post to my question but no resolve as yet.

I have a rest pocket profile set with 4mm clear and 3.175mm rest, my understanding is that the rest path clears all that the 4mm bit cannot clear.

My preview for the rest path shows all the correct rest clearings but then follows up with a profile pass of the entire profile without ignoring the 4mm clearance setting.

This preview shows part way through the rest operation as I would expect at 2.24

From 2.24 to 5.34 shows what I believe should be ignored, it can’t be a preview glitch as the Gcode shows the entire pass. I’ve stopped the preview early to make my point clearer to visualise.

I’ve tried all sorts of permutations with no success, file attached if anyone is interested.

Rest pocket.mage (127.6 KB)

Cheers

[wanderingtruckie (terry - oval lane creations)]

1. when 1st clicking preview , it says you have no tool paths set
2. you only have a rest pocket operation, you need a pocket operation 1st for a rest pocket to work
3. the profile at the end is offset clearing pattern automatically does outline pass after
5. is this what you were meaning
   
6. v2 Rest pocket.mage (129.1 KB)

[Gazman (Garry Leighton)]

Thanks for taking the time to reply,

@wanderingtruckie

when 1st clicking preview , it says you have no tool paths set

There must be a disconnect of some sort with my file that you have loaded, I have re-loaded my end and it is as I described with an associated tool path. Please see the darkened profiles to show they have been associated with the rest path.

@wanderingtruckie

you only have a rest pocket operation, you need a pocket operation 1st for a rest pocket to work

Yes I understand this but as it happens I get the same result with or without a ‘pocket operation first’ I uploaded the rest operation on it’s own to keep things simple and to hopefully avoid any confusion.

@wanderingtruckie

is this what you were meaning

Unfortunately not but thank you thus far.

[wanderingtruckie (terry - oval lane creations)]

no worries, thats odd, sorry cant be more help , hopefully someone else can shed some light on your issue

[MikeyH (Mike Hembrey)]

Can’t view file becase answering on my tablet, but I an wondering if you are having a tool diameter issue in the narrow parts.

It is hard to diagnose half a program. Can you upload one with all the bells and whistles intact?

[Gazman (Garry Leighton)]

Thanks for your reply, as it happens only this morning I have found the reason behind my frustrations. Funnily enough it was nothing to do with tool sizing’s, in my particular situation it was all down to the offset/raster options in the rest settings.

Up until now I had the rest set to ‘offset’ which resulted the desired rest operation but then it would run a full profile pass of all the selected shapes when I only wanted the rest path, and the run a separate profile pass to finish.

I changed the rest option from offset to raster with no outline and BINGO, all ran as I would have expected….question now is….this is my first use of a rest operation but is there something wrong with the rest settings?

UPDATE.

After a bit more playing around with the rest settings it would seem I’m not as mad as I thought.

I have now tried this a dozen times and every time it’s the same for me….

I go into the rest settings, it comes up with ‘offset’ by default giving this preview (I’ve stopped the pass half way through to show the rest followed by profile pass which is not what I wanted)

Now if I toggle from offset to ‘raster no outline’ then I get this (What I expected)

NOW….if I go into the rest settings again and toggle back to ‘offset’ I get this. Hoorah!

All as clear as mud

[Gazman (Garry Leighton)]

UPDATE.

After a bit more playing around with the rest settings it would seem I’m not as mad as I thought.

I have now tried this a dozen times and every time it’s the same for me….

I go into the rest settings, it comes up with ‘offset’ by default giving this preview (I’ve stopped the pass half way through to show the rest followed by profile pass which is not what I wanted)

Now if I toggle from offset to ‘raster no outline’ then I get this (What I expected)

NOW….if I go into the rest settings again and toggle back to ‘offset’ I get this. Hoorah!

All as clear as mud

[MikeyH (Mike Hembrey)]

@Gazman

All as clear as mud

I have to agree. I was really hoping for the complete file. You are showing the output, but holding back the input.

@Gazman

(I’ve stopped the pass half way through to show the rest followed by profile pass which is not what I wanted)

You make it sound like you are running the Rest pass before the Profile pass.

A CNC “rest pass” (short for rest machining or “remaining stock” machining) is a specialized toolpath operation designed to remove material that was left behind by a previous, larger cutting tool. It is essentially a “clean-up” pass that targets specific areas, such as tight corners or small pockets, that the larger tool could not reach, thereby enhancing efficiency and precision.

[LightBurn (Oz)]

This was a bug that was found and fixed already. Since you’re still using the RC, and not the released version, you’ll still have many bugs that have already been fixed.

(the “offset” pocket method was seeing the “raster” outline option and running it - offset will no longer run the final pass)