PhillipM
Posts: 37
Joined: Mon Jul 31, 2017 3:25 pm

[FIXED] Randomise Start Point doesn't work on single perimeters

As above, "Randomise Start Points on Perimeters" doesn't work on single extrusion perimeters - it will start the extrusion in the same place every time, like it's stuck on 'fastest' setting, leading to an unsightly seam or buildup if start/stops aren't perfect (such as with larger nozzles that drool)
woodwinds
Posts: 3
Joined: Mon Oct 30, 2017 3:59 am

Re: Randomise Start Point doesn't work on single perimeters

is this Problem solved?

many thanks for a short answer
gearsawe
Posts: 233
Joined: Sun Sep 10, 2017 11:06 pm

Re: Randomise Start Point doesn't work on single perimeters

Not seeing the problem...Note the retraction is where the stop starts are.
Are you using the cork screw option?
This will not allow random starts.
Random2.JPG
Random1.JPG
PhillipM
Posts: 37
Joined: Mon Jul 31, 2017 3:25 pm

Re: Randomise Start Point doesn't work on single perimeters

Just to bump this as no response - I still can't find a workaround for this:
RandomStartsDontWokr.jpg
PhillipM
Posts: 37
Joined: Mon Jul 31, 2017 3:25 pm

Re: Randomise Start Point doesn't work on single perimeters

Bump, still having problems with this. Mainly on models with single extrusion perimeters.
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dkightley
Posts: 2405
Joined: Tue Mar 10, 2015 4:09 pm

Re: Randomise Start Point doesn't work on single perimeters

Start points have been discussed and proven working on several occasions so there must be something unique with what you are doing.

Can you please attach a factory file for an example where you are having this issue.

Also, what version of S3D are you using??
Doug Kightley
Volunteer at the National Tramway Museum http://www.tramway.co.uk
Railway modeller and webmaster at http://www.talkingtgauge.net
PhillipM
Posts: 37
Joined: Mon Jul 31, 2017 3:25 pm

Re: Randomise Start Point doesn't work on single perimeters

4.0.1 - I've had this issue for a long time, it's very easy to generate in a few files, here's one, perimeters all have the same start points, even without being singles.
Attachments
Subframe Mount Poly.factory
(72.74 KiB) Downloaded 173 times
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dkightley
Posts: 2405
Joined: Tue Mar 10, 2015 4:09 pm

Re: Randomise Start Point doesn't work on single perimeters

There's obviously some interaction between settings coming into play....because if you uncheck the "Print islands sequentially without optimization" I think you'll get what you're wanting.
Doug Kightley
Volunteer at the National Tramway Museum http://www.tramway.co.uk
Railway modeller and webmaster at http://www.talkingtgauge.net
PhillipM
Posts: 37
Joined: Mon Jul 31, 2017 3:25 pm

Re: Randomise Start Point doesn't work on single perimeters

What I'll get is an overheated mess from it slapping two layers of plastic down consecutively on one part.
There's no logical reason that setting shouldn't allow randomised start points.

I have this issue on many similar prints.
djtopper
Posts: 2
Joined: Sat Sep 22, 2018 5:40 pm

Re: Randomise Start Point doesn't work on single perimeters

I'm having this problem too. Doesn't matter if I have "Print islands sequentially" checks or not. Start point doesn't work either way.

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