Support to Optimization path functions - siemens 840D

igor · 2017-01-13 12:18:00

Hello everybody!

It would be great if in the next Vericut rev, it supports siemens path optimization functions (like G642 / G645 / COMP and others).
We use these functions to gain cycle time because the machine controls calculate a "new path" by rounding the original path in the nc-program. But as the machine follows a different path, sometimes the surface isn't totally machined, and since vericut does not support these functions, the simulation flies without any problem.

Does anyone know how to handle this topic? I think cgtech should add this support in the next rev cause it's a big problem if we can not predict this issues before the machine runs, however this is consequences of calculations, then vericut is able to do the same.

Thanks a lot!

Verifun · 2017-01-21 00:31:00

Igor,

Sinumerik NCK use high performance compressor and curve fitting algorithms to make the changes in the toopalth. Besides the geometrical changes in the motion, they mess with jerk and acc/de-acc settings in the control. Something you cannot emulate reliably in a software. You need the mechanics.

VERICUT probably support such commands when commanded by Siemens VNCK. When you have this module, in a simplistic explanation, VERICUT G-Code To APT parser no longer commands the motions, but instead, VNCK tells VERICUT how to move. It´s not that simple but for the sake of explanation, this is how it works basically.

So I doubt the regular verification package will offer this because this is immensely tied to the control settings, the parameters from the machine, its mechanics, etc.

Although Siemens and CGTech have a technological partnership, I don´t think Siemens or any other CNC vendor would share their smoothing algorithms and technology with a software partner. It takes years of R&D to develop such technology. And it is different for each control out there. CGTech has to focus in making their solutions comprehensive and reliable for most of the users.

Not saying you won´t get it because I don´t know their roadmap... But I´d say the odds are low for this one in the regular Verification license.

But you could check with CGTech Brazil the price tag for a VNCK license... and double check if it can mimic those functions when used with VERICUT.

By the way: As you work for a machine OEM and frequently wants to use very advanced functions of the Sinumerik control, the VNCK license is a good answer for your needs. CGTech has to license it from Siemens, and you have to tell it ALL the parameters and settings the real control uses. Your entire ARC file + more I think. The VNCK is indeed the same kernel the real control uses, so it behaves exactly like the real one.

Prepare your wallet... Boa sorte!

Last edited by Verifun (2017-01-21 00:35:04)

igor · 2017-03-24 18:50:13

Hi Daniel

Thank you for the suggest.
I have already talked with the people here about this topic, but as you know, it not cheap.
Even though I doubt about Cgtech reach this point of accuracy, I sent this to them and now I am waiting a feedback.

Tanks again!

DaveF · 2017-08-29 22:32:51

Hi Daniel,

I am interested in deploying CYCLE832.... the high performance compressor and curve fitting algorithms. As you mention, VNCK lets you load the archive into Vericut. Ideally, the same impulses that will move the axes on the real machine will move the Vericut machine "exactly" the same way.

My question is... are you using VNCK?

I hear there are issues such as getting errors and not being able to reset and continue. And long cycle times. I imagine, the cycle time issue can be overridden with paramaterized feedrates.

Thanks
Dave

VERICUT Users' Forum

#1 2017-01-13 12:18:00

Support to Optimization path functions - siemens 840D

#2 2017-01-21 00:31:00

Re: Support to Optimization path functions - siemens 840D

#3 2017-03-24 18:50:13

Re: Support to Optimization path functions - siemens 840D

#4 2017-08-29 22:32:51

Re: Support to Optimization path functions - siemens 840D

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