Hi Todd,
I'm the not an expert and I have no idea about the cutting speeds or depth of
cut but here's one idea for you. Generated by AlibreCAM (Unsupported MecSoft
VisualCAM) you can program a hole profile to have tabs that hold the middle
piece.
I created a 5"x5" piece 1.75" thick. Created
It seems like a slotting tool path would be the way to go. Tabs to hold the
center in place has been suggested but it could be accomplished also with
the masking tape and super glue method:
https://www.youtube.com/watch?v=e-coDYZCmEw
On Tue, Feb 28, 2023 at 4:26 PM Robin Szemeti via Emc-users <
I need to mill about a 3.75" hole through a piece of aluminum about 1.75"
thick. What is the best strategy to accomplish this on a cnc mill. Is it best
to us a pocketing strategy and mill out the entire hole from the center out, or
would it be better to use some kind of cutting strategy and
You could use a slotting strategy and tabs (at the bottom) to retain the piece
if you wanted to save the material. Then cut the tabs out by hand. Optionally
do another finish pass after manual removal if the wall surface matters. But
I’d probably just use an adaptive strategy to turn it into
On 2/28/23 16:47, Matthew Herd wrote:
You could use a slotting strategy and tabs (at the bottom) to retain the piece
if you wanted to save the material. Then cut the tabs out by hand. Optionally
do another finish pass after manual removal if the wall surface matters. But
I’d probably just
I'd mill it down do within 1 or 2 mm of the bottom of the material and then
swap to a smaller cutter to remove just the outer of the thinner material
and leave 3 supporting tabs. Remove the centre piece by hand and then do
a single full depth cleanup pass.
I do this a lot when routing sheet MDF
A few comments/questions:
Is this a one-off job? If so your time is more valuable than the possible
recovery of a usable scrap of aluminum. Besides, do you have a use for a 1.75x3
chunk of aluminum?
The stock is 1.75 thick. That means an endmill with a stickout of 2 inches or
more. A small
A 20mm cutter will be fine, with a 16mm to remove the final bit of skin and
be safely away from the plug, leaving some tabs.
On Wed, 1 Mar 2023 at 01:36, wrote:
> A few comments/questions:
> Is this a one-off job? If so your time is more valuable than the possible
> recovery of a usable scrap
What is the value of a possibly damaged 20mm carbide endmill versus the value
of a 2.5 inch diameter 1.75 inch long plug of aluminum?
-Original Message-
From: Robin Szemeti via Emc-users
Sent: February 28, 2023 8:51 PM
To: Enhanced Machine Controller (EMC)
Cc: Robin Szemeti
Subject:
