Hi Dan,
Which milling machine is difficult to say. It depends on a load of things
(as you know) but about controllers i can tell you one thing: look at the
block cycle-time:
For instance:
When you want an accuraccy of 0.01mm (normal in tooling) then the avarage
distance between two "NC-points" (from point A to the following point B) is
about the same: 0.01 mm. When you have a controller with a block cycle time
(the time to process a NC-line (called a block)) of 2ms (normal in
controllers) then the machine isn't capable to have a feedrate higher then
0.01mm / 2 ms = 0.01 m / 2s = 0.005 m / s = 0.3 m/min
isn't high speed or fast at all. So when the manufacturere tells you that
they can get a feedrate of 20 m/min look very good at the controller.
In most of the cases is the controller the last bit of the machine: I think
it is one of the first pieces to look at. Especially at 5-axiis in which a
controller is asked for a lot of calculations
Once again : look very very very good at your controller
Bye from Holland
Jan Willem Gunnink
> -----Oorspronkelijk bericht-----
> Van: Dan Davis [SMTP:skater32@post1.com]
> Verzonden: woensdag 28 oktober 1998 10:53
> Aan: rp-ml@bart.lpt.fi
> Onderwerp: 5 axis CNC Machining Centres
>
> Hello,
>
> We are looking to purchase a high end 5 axis machining
> centre. What models do you recommend? We are looking for a
> table size of about 1 meter sq., 20 tools, fastest speed and
> feed available.
>
> Also, which controller is recommended?
>
> Thanks in advance.
>
> For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
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