Re: [CAD_CAM_EDM_DRO] Modified G78 pecking ?

G-73 allows you to set a retract amount rather than a full retract
to R level such as in G-83.

----- Original Message -----
From: "turbulatordude" <davemucha@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, August 12, 2002 1:47 PM
Subject: [CAD_CAM_EDM_DRO] Modified G78 pecking ?


> Hi,
>
> G78 calls for a drill pecking that uses a full retract on each peck.
> The holes I am drilling only need to have the drill retract to let
> the chips ride up the drill. The small up then down lets the chips
> out of the hole quite successfully.
>
> Is there a multi-stage peck ? one that would start, approach the
> part, drill, withdraw a little, then continue drilling for the
> pecking cycle, then withdraw fully ?
>
> Something like drill 0.02", withdraw 0.01" the take another 0.02" so
> that the top of the retract was only slightly above the last drilled
> hole and not fully to the start ?
>
> or is my best bet to move the Z to just above the part and peck from
> there ?
>
> My problem is drilling long holes in aluminum with tiny bits. 3/64
> drill into a 1/4 inch plate. it's 6063 aluminum so it's kinda
> sticky, but produces long chips.
>
> Dave
>
>
>
>
>
>
>
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