Re: [Emc-users] Feeds and speeds

Wed, 19 Feb 2020 10:04:27 -0800 


> -----Original Message-----
> From: Jon Elson [mailto:[email protected]]
> With soft aluminum, the key is to take light cuts and keep
> the feedrate up.  The problem is that when the metal is
> warmed even a little, it gets MUCH softer.  So, you want to
> keep the cut moving along as fast as possible to not allow
> heat to build up in one spot.  Coolant can also help with
> this.  Thick pieces of aluminum can draw the heat away, so
> it is less of a problem.
> 
> 6061-T6 (or -T651) cuts great, 5052 or 1100 is much trickier
> in this regard.
> 
> Jon
And soft castings from scrap aluminium like extruded old window frames is a 
challenge unto itself.  I too use WD-40 for that.  Been thinking of just using 
a spray bottle with kerosene.  Supposed to be just as good and much cheaper.
John Dammeyer



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