k...@gmail.com wrote:
> There is a bit of talk on some machine shop forums, arguments perhaps, that
> retrofitting a machine is a waste of time.
> And that it's time and money well spent to just buy a good used
> machine and move on with making money with it.
> Any comments on this from the list?
>   
Depends.  If you are a production shop with orders to fill, and no in-house
controls people, then this is likely true.  if you have the in-house 
expertise
(or local people who have that expertise at much less than $1000 a day)
then it may not be true.  Yes, some of these retrofits can become a can
of worms, especially when you try to cheap out and re-use old parts
that may not be in the best shape.  The old controls develop all sorts
of bad connections and failing components.  And, the first time you
do a retrofit, there is a learning curve, that is certainly true.

But, once you are past that learning curve, the second retrofit
will come MUCH easier.  Also, you will be able to fix the machine
yourself when something fails, and afford to keep spare parts
on hand.  Compare prices for many of these retrofit parts against
Fanuc spares and service people's hourly rates, and you might
start to see what we are talking about, here.

Jon

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