THC Velocity lock and void lock

mariusl
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08 Sep 2020 17:03 #181301 by mariusl

THC Velocity lock and void lock was created by mariusl

Can someone please elaborate for me on the THC Velocity lock and the Void lock. How do they think and how do I control their behavior?

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Marius

www.bluearccnc.com

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tommylight
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08 Sep 2020 20:23 #181316 by tommylight

Replied by tommylight on topic THC Velocity lock and void lock

THC Velocity lock = lock the THC if the feed rate during cutting goes below a set point, normally happens on corners when the velocity has to be lowered to keep with the acceleration constraints. Can be set in the GUI as a percentage of the feed rate.
Void lock = lock the THC if the voltage goes up very quickly during cutting inside a preset time period, normally happens when crossing a previously cut line on the material. This is done to prevent the torch going to low and hitting the material.

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mariusl
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08 Sep 2020 20:58 #181320 by mariusl

Replied by mariusl on topic THC Velocity lock and void lock

Thanks Tommy, I think I have it. My problem must be with Void lock as I dont recall setting any parameters for that but the option is on.

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Marius

www.bluearccnc.com

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rodw
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08 Sep 2020 21:16 #181323 by rodw

Replied by rodw on topic THC Velocity lock and void lock

I think the void lock is still a work in progress. Its a method to disable the THC when a massive and rapid spike in voltage occurs when the torch crosses a void.

I've got close but have not revisited it for a long time. Generally, good part design and nesting avoids the issue so it sounds good in theory but is protecting against a condition that rarely occurs in practice.

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phillc54
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08 Sep 2020 23:21 #181334 by phillc54

Replied by phillc54 on topic THC Velocity lock and void lock

mariusl wrote:
Thanks Tommy, I think I have it. My problem must be with Void lock as I dont recall setting any parameters for that but the option is on.

Void lock was working for me at default values last time I tested it. If you want to disable it then uncheck the checkbox and save the parameters.

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mariusl
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09 Sep 2020 06:36 #181373 by mariusl

Replied by mariusl on topic THC Velocity lock and void lock

rodw wrote:
I think the void lock is still a work in progress. Its a method to disable the THC when a massive and rapid spike in voltage occurs when the torch crosses a void.

I've got close but have not revisited it for a long time. Generally, good part design and nesting avoids the issue so it sounds good in theory but is protecting against a condition that rarely occurs in practice.

I agree, one should take care in nesting the parts. I don't think the system should correct bad job creation. Although it could come in handy if a straight cut is made to clean up remainder material.

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Marius

www.bluearccnc.com

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rodw
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09 Sep 2020 07:16 #181384 by rodw

Replied by rodw on topic THC Velocity lock and void lock

mariusl wrote:

I agree, one should take care in nesting the parts. I don't think the system should correct bad job creation. Although it could come in handy if a straight cut is made to clean up remainder material.

Yes sheet severing and cutting a hole in heavy plate when the slug drops away are the two use cases I want it for.

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mariusl
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09 Sep 2020 10:53 #181410 by mariusl

Replied by mariusl on topic THC Velocity lock and void lock

rodw wrote:

mariusl wrote:

I agree, one should take care in nesting the parts. I don't think the system should correct bad job creation. Although it could come in handy if a straight cut is made to clean up remainder material.

Yes sheet severing and cutting a hole in heavy plate when the slug drops away are the two use cases I want it for.

Especially if you are using lead ins and outs. The slug drops before the lead out cut is complete and causes the ARC_OK signal to be dropped.

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Marius

www.bluearccnc.com

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mariusl
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17 Sep 2020 12:08 #182533 by mariusl

Replied by mariusl on topic THC Velocity lock and void lock

Just been talking to a customer and realized that there is a very important use for Void Lock. It is used when one does chain cutting on a job and it is not always possible to route the cut path to miss a previous kerf.
Please keep this feature!!

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Marius

www.bluearccnc.com

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tommylight
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17 Sep 2020 12:11 #182534 by tommylight

Replied by tommylight on topic THC Velocity lock and void lock

mariusl wrote:
Just been talking to a customer and realized that there is a very important use for Void Lock. It is used when one does chain cutting on a job and it is not always possible to route the cut path to miss a previous kerf.
Please keep this feature!!

I am pretty sure it is staying there, just did not have the chance to give it a thorough test and report back to Phill .

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