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NC Pros and Cons

acgarcia
Looking to get into PC-Dmis NC. We currently use Renishaw touch probes to locate parts. Never used them for actual measurements.

Some info:

I'm a CMM guy, not a machinist, is that a problem for NC?
The machinists we do have tend to crash the machines a lot.
Trying to reduce or eliminate human qc steps.
Make small and large parts for oil and gas industry.
Tightest tolerance would be 0.0005in.
Mostly steel, some brass and aluminium.
Machines are Haas mills and Mori multi turning centers. Mori Lathes, 1 Toshiba large boring mill.
Don't know if I need 3, 4 or 5 axis NC Options.
What if I what a singe probe and a star probe?

I got some info from our sales person but I'm still looking for other info. Seems to be cheaper than buying another CMM. We are buying new CNC mulit turning centers like ever other month now. Most of which have tooling carousels with plenty of free space. One purchase came with a renishaw probe that uses radio frequencies. A mori person was here setting it up to locate the part. I asked her about actual measurements and reporting but she didn't know about that side of it.

Any advice or input would be appreciated.
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  • I got some info from Hexagon last week and we did a webex demo today. I invited 2 of our machine programmers, they were excited. It looks like it can help them eliminate some manual work as well. Seems promising. Just to answer some of my original questions.

    No you don't have to be a machinist. NC actually turns your CMM code into G-code that gets input into the machining program.
    If the machine crashes, recalibrate the probes.
    You can have more than one probe in the machine, just like a CMM.
    NC can use renishaw probes, or upgrade to hexagons.

    You can inspect a feature like a circle and based on the deviation, automatically offset the machine cutting tool for the next part to be closer to nominal.
    No manual alignments, use the CNC machine coordinates until you dcc align to the part.
    Its works like a server with up to 10 machines on 1 seat. We are probably going to start with 1 and then work our way up. A tech has to install pcdmis on each machine to get the machine parameters and such.
    You can use variables, assignments, and print reports just like a CMM.
    No annual calibration. all accuracy relies on calibration artifact.

    A have a few more technical questions and I'll post as soon as I get them answered.
  • in reply to acgarcia
    Hexagon sells their version of machine probes in case you didn't want to use or have a Renishaw probe.
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