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Author Topic: How to make Lathe G83 peck run faster  (Read 4435 times)

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How to make Lathe G83 peck run faster
« on: April 02, 2013, 01:03:57 PM »
I've just brought up a lathe using the 0.057 version of Mach and overall its working well.

One issue I'm having though, with the G83 peck drill command I typically set the peck increment to the drill diameter and the retract height to just above the hole so I can clear all the chips and relube the bit, so typically with a 1/2" drill something like the below:

G83 Z-2.0 Q0.5 R0.2

But unlike my Mach mill, the lathe pecks the hole correctly and rapids out to the retract height but then it feeds back down to restart drilling at the current feed rate, rather than rapiding down to just above the restart depth and then going into feed rate. For deep holes this makes drilling pretty slow.

I saw a mention in a forum posting that there is a Mach config setting for this but I can't find it anywhere, is there a way to turn on rapid moves during the peck re-entry?

Thanks,

Paul T.

Offline RICH

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Re: How to make Lathe G83 peck run faster
« Reply #1 on: April 05, 2013, 07:51:34 AM »
Paul,
Have not done any peck drilling in a long time on the lathe. When i did i didn't use the G83 but rather used the lathe peck
drilling macro (M830?) which can be found in the link below. I think it will address what you have found.

BTW, NFS has a wizard for the lathe that you may want to explore.

http://www.machsupport.com/forum/index.php/topic,15205.msg101682.html#msg101682

RICH
« Last Edit: April 05, 2013, 07:53:42 AM by RICH »
Re: How to make Lathe G83 peck run faster
« Reply #2 on: April 05, 2013, 12:46:04 PM »
Hi Rich-

Thanks for the suggestions. Unfortunately I've got a lot macros I wrote for a previously lathe that use "standard" G83 calls and I was hoping to be able to run those without hacking them up. They do run correctly, just slower than heck because of the slow feed down during the pecks.

I could have sworn a while ago I saw a mention in a forum post that this feed down characteristic can be set with a Mach setting.

Did I imagine this or does this setting really exist? Perhaps (and unfortunately) its only accessible in the mill configurations.

Thanks,

Paul T.
Re: How to make Lathe G83 peck run faster
« Reply #3 on: April 05, 2013, 03:26:55 PM »
Hi Paul,

I am pretty sure there is no setting for this.

Please read the changelog ( last entry ) it is solved in 0.62

Alex


 
Re: How to make Lathe G83 peck run faster
« Reply #4 on: April 05, 2013, 04:15:53 PM »
me again,

just see its not solved. The G83.1 ( high speed peck drill ) is running now,

but not the G83 what you want.


If you like risk  ;D you may want to give the attached cycle ( modified by me ) a try.

On your OWN RISC, NO GUARANTEE at all. It should be running fine. BUT WHO KNOWS?

Rename it to M1083.m1s and place it to your lathe profile macros folder.


Alex

Offline Hood

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Re: How to make Lathe G83 peck run faster
« Reply #5 on: April 05, 2013, 05:06:59 PM »
Seems to be working fine in the test I have done with your macro Alex :)
Hood
Re: How to make Lathe G83 peck run faster
« Reply #6 on: April 05, 2013, 05:15:58 PM »
Hi Hood,
thanks.
Should be free from issues I hope.
Took me two weeks that "damn" thing  ;D

Alex

Offline Hood

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Re: How to make Lathe G83 peck run faster
« Reply #7 on: April 05, 2013, 05:19:22 PM »
LOL I have often looked at macros with the intent of altering them but usually give up before I start as I know I am crap at VB ;D
I have done modifications to a few but very basic mods only.
Hood
Re: How to make Lathe G83 peck run faster
« Reply #8 on: April 05, 2013, 05:20:47 PM »
 :D ;D

Alex
Re: How to make Lathe G83 peck run faster
« Reply #9 on: April 05, 2013, 09:36:24 PM »
Alex, your revised version fixed the issue for me, thanks a ton for sharing that. I owe you a cold one (or hot one, whatever you prefer).

Paul T.