THC disable when crossing over existing kerf?

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motoguy
Posts: 107
Joined: Sun May 01, 2016 12:02 am

THC disable when crossing over existing kerf?

Post by motoguy » Wed Jul 12, 2017 7:09 am

I'm curious if it would be possible for Sheetcam to disable THC when crossing an existing kerf. I'm assuming this is a geometry issue on the Sheetcam side, and not a post/THC/table controller issue?

I ran into an issue today, using loops on corners. The torch would loop out for the cut, and then dive as soon as it crossed the existing kerf on the way back into the part geometry. I've had other situations where it would be nice for Sheetcam to disable THC on existing kerf as well (think thin cuts, maybe 2x kerf width or less).

motoguy
Posts: 107
Joined: Sun May 01, 2016 12:02 am

Re: THC disable when crossing over existing kerf?

Post by motoguy » Wed Feb 21, 2018 9:16 pm

bump. Thanks!

jacky elliott
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Re: THC disable when crossing over existing kerf?

Post by jacky elliott » Wed Mar 28, 2018 2:43 am

Hey motoguy, not sure about the other situations but looping corners is an easy fix. Just use a path rule on corners. Set up your code to shut of thc prior to the corner and come on after.

jacky elliott
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Joined: Mon Mar 05, 2018 12:19 pm

Re: THC disable when crossing over existing kerf?

Post by jacky elliott » Wed Mar 28, 2018 2:46 am

here is an example
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Les Newell
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Re: THC disable when crossing over existing kerf?

Post by Les Newell » Wed Mar 28, 2018 5:29 pm

Detecting when you cross the kerf is a tricky one. This could theoretically be done with a new path rule type but path rules don't know the cut direction so you would end up with the rule triggering twice for every crossing. Say for instance you have one loop. It would trigger as you enter the loop and again as you exit it.

SeanP
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Joined: Wed Oct 23, 2013 9:50 am

Re: THC disable when crossing over existing kerf?

Post by SeanP » Sun Apr 01, 2018 8:23 am

Don't forget about action points as well, they work great for those areas that don't fit into rules, easy enough to use.

motoguy
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Joined: Sun May 01, 2016 12:02 am

Re: THC disable when crossing over existing kerf?

Post by motoguy » Fri Apr 06, 2018 3:46 am

SeanP wrote:
Sun Apr 01, 2018 8:23 am
Don't forget about action points as well, they work great for those areas that don't fit into rules, easy enough to use.
I have to agree with this. I've been running my table 2+ years, and was unaware of "action points" until recently. They were GREAT for situations that would fall outside of normal rule sets for whatever reason.

motoguy
Posts: 107
Joined: Sun May 01, 2016 12:02 am

Re: THC disable when crossing over existing kerf?

Post by motoguy » Fri Mar 22, 2019 12:28 am

Came back to this to ask the same question, "re-discovered" action points again...need to give those a shot!

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