G84 seems to be stuck in peck mode

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G84 seems to be stuck in peck mode

Postby Derek » Sat Sep 16, 2017 4:00 pm

No QX.XX in the code but it still pecks. Change G84 to G33.1 and it works as expected. Version 1.2044

Thanks
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Re: G84 seems to be stuck in peck mode

Postby cncdrive » Sat Sep 16, 2017 4:09 pm

Hi Derek,

I looked in the documentation and the Q parameter is modal in the G84.
Our document says:

"If the Q parameter is not programmed then the tapping cycle is executed from a single pass, except if the Q parameter was previously defined, then the previous Q value will be used, because the Q parameter is modal."

I will look up how it is done in other controllers, because G84 is not part of the RS274NGC g-codes standards, it is not a very standard code, so I can only look into other controllers documentations and make comparions, but I think we already did this when we implemented it and probably the Q was modal in other controls is why it was done this way in the UCCNC too, but to make sure I will look this up again soon...
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Re: G84 seems to be stuck in peck mode

Postby Derek » Sat Sep 16, 2017 4:18 pm

Does G80 clear it because I tried that.
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Re: G84 seems to be stuck in peck mode

Postby cncdrive » Sat Sep 16, 2017 4:27 pm

Good question, I don't remember that, will have to check it, but I'm not at home at the moment, can check it only on Monday.
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Re: G84 seems to be stuck in peck mode

Postby Vmax549 » Sat Sep 16, 2017 9:33 pm

Being that the Q(peck) in G84 is not a standard option for G84 it should not be modal.

Just a thought, (;-) TP
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Re: G84 seems to be stuck in peck mode

Postby cncdrive » Sat Sep 16, 2017 10:17 pm

Maybe we should just remove the Q parameter?
I mean if it is not standard ... is it useful at all for anybody?
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Re: G84 seems to be stuck in peck mode

Postby Derek » Sat Sep 16, 2017 11:08 pm

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Re: G84 seems to be stuck in peck mode

Postby Vmax549 » Sun Sep 17, 2017 12:31 am

I stand corrected (;-) but the Q should be cancelled with a G80.

Actually I just looked again in the fanuc manual and there was no Q param in my manual but that does not mean much (;-)

But it still a very usefull parameter and function AND SHOULD BE INCLUDED IN uccnc. The Idea is to make UCCNC do functions that others should have as well but don't.




(;-) TP
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