Re: [CAD_CAM_EDM_DRO] Inserts in the home shop

stratton@... wrote:

> >
> > Hello Friends,
> > In a home shop it depends on your expectations of the finished
> > part AND on your machine if inserts are useful.
> > A wobbly machine will kill every insert within seconds. so that
> > obviously
> > becomes very expensive!
>
>
> Was there something seriously wrong with your machines?

Hello Chris and list,
Yes it was, but that is a story 11 years ago. ( I ordered and paid for a rebuilt machine
and got delivered a wreck where the full main electric box was full of chips so the rest and the
electric wiring of the control of the hydraulic copier torn out)
The insert braking was due to the following points that may effect more than one in the list.
:
The chuck bearings where loose!

The self adjusting nut of the transversal slide lost the screws that kept it together so the
backlash was unpredictable. It varied from 0,1 to 1 mm in diameter.

The gib in the chariot was loose.
The surfaces of the tool post and lift plate were so worn that the whole assembly
started to bend when you did a cut.

> If I were to use HSS steel for everything I would be forever
> sharpening - so I use carbide for steel and cast iron and hss for
> aluminum and brass.
>
> Chris

So do I. But as you see first the machine has to be tuned up to get stiffness.
Good Luck
Sven Peter



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